Patent Publication Number: US-11649793-B1

Title: Intake manifold assembly for internal combustion engine system

Description:
TECHNICAL FIELD 
     The present application relates generally to intake manifold assemblies for internal combustion engine systems. 
     BACKGROUND 
     Internal combustion engines combust a fuel to produce energy. An internal combustion engine may include an exhaust gas recirculation (EGR) system. The EGR system provides exhaust gas back to an intake manifold of the internal combustion engine. The intake manifold combines intake air with the exhaust gas from the EGR system and provides the combined air and exhaust gas to the internal combustion engine. As a result, the internal combustion engine combusts fuel in combination with air and the exhaust gas. 
     SUMMARY 
     In one set of embodiments, an intake manifold assembly includes an exhaust gas recirculation system and an intake manifold. The exhaust gas recirculation system includes a venturi with a venturi body. The venturi body includes an upstream cylindrical portion, a convergent portion, a downstream cylindrical portion, and a divergent portion. The upstream cylindrical portion is in exhaust gas receiving communication with a cylinder of an internal combustion engine system and configured to receive the exhaust gas from the cylinder. The convergent portion is contiguous with the upstream cylindrical portion and in exhaust gas receiving communication with the upstream cylindrical portion. The downstream cylindrical portion is contiguous with the convergent portion, separated from the upstream cylindrical portion by the convergent portion, and in exhaust gas receiving communication with the convergent portion. The divergent portion is contiguous with the downstream cylindrical portion, separated from the convergent portion by the downstream cylindrical portion, and in exhaust gas receiving communication with the downstream cylindrical portion. The intake manifold includes an intake manifold body. The intake manifold body includes an air inlet body, an exhaust gas inlet body, and an outlet body. The air inlet body is configured to receive air. The exhaust gas inlet body is in exhaust gas receiving communication with the divergent portion. The outlet body is in air receiving communication with the air inlet body and exhaust gas receiving communication with the exhaust gas inlet body. 
     In another set of embodiments, an internal combustion engine system includes a cylinder head, an exhaust manifold, and an intake manifold assembly. The cylinder head has a hot side and a cold side. The exhaust manifold is in exhaust gas receiving communication with the cylinder head. The exhaust manifold is coupled to the hot side. The intake manifold assembly includes an intake manifold and an exhaust gas recirculation system. The intake manifold has an intake manifold body that is configured to receive air, in exhaust gas receiving communication with the exhaust manifold, and configured to provide a mixture of the air and the exhaust gas to the cylinder head. The intake manifold body is coupled to the cold side. The exhaust gas recirculation system includes an exhaust gas recirculation valve and a venturi. The exhaust gas recirculation valve is in exhaust gas receiving communication with the exhaust manifold. The venturi has a venturi body in exhaust gas receiving communication with the exhaust gas from the exhaust gas recirculation valve and to provide the exhaust gas to the intake manifold, the venturi body coupled to the intake manifold. 
     In yet another set of embodiments, an internal combustion engine system includes a cylinder head, an exhaust manifold, and an intake manifold assembly. The cylinder head has a hot side and a cold side. The exhaust manifold is configured to receive exhaust gas from the cylinder head. The exhaust manifold is coupled to the hot side. The intake manifold assembly includes an intake manifold, an upstream isolator, and an exhaust gas recirculation system. The intake manifold is configured to receive air, receive the exhaust gas, and provide a mixture of the air and the exhaust gas to the cylinder head. The intake manifold is coupled to the cold side. The intake manifold includes an upstream venturi flange having an upstream venturi flange aperture. The exhaust gas recirculation system includes a venturi with a venturi body configured to receive the exhaust gas from the exhaust manifold and to provide the exhaust gas to the intake manifold. The venturi body includes an upstream intake flange having an upstream intake flange aperture. The upstream isolator is inserted within the upstream intake flange aperture. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The details of one or more implementations are set forth in the accompanying drawing and the description below. Other features, aspects, and advantages of the disclosure will become apparent from the description, the drawing, and the claims, in which: 
         FIG.  1    is a perspective view of an example internal combustion engine system including an intake manifold assembly; 
         FIG.  2    is a perspective view of an inlet adaptor of the intake manifold assembly of  FIG.  1   ; 
         FIG.  3    is a cross-sectional view of a portion of the inlet adaptor shown in  FIG.  2    taken along plane A-A; 
         FIG.  4    is another perspective view of the internal combustion engine system shown in  FIG.  1   ; 
         FIG.  5    is yet another perspective view of the internal combustion engine system shown in  FIG.  1   ; 
         FIG.  6    is a top view of an intake manifold of the intake manifold assembly of  FIG.  1   ; 
         FIG.  7    is a cross-sectional view of the intake manifold shown in  FIG.  6    taken along plane B-B; 
         FIG.  8    is a bottom view of the intake manifold shown in  FIG.  6   ; 
         FIG.  9    is a front view of the intake manifold shown in  FIG.  6   ; 
         FIG.  10    is a left side view of the intake manifold shown in  FIG.  6   ; 
         FIG.  11    is a cross-sectional view of a portion of the intake manifold shown in  FIG.  6    taken along plane C-C; 
         FIG.  12    is a perspective view of a portion of the intake manifold assembly of  FIG.  1   ; 
         FIG.  13    is a bottom view of the intake manifold assembly shown in  FIG.  12   ; 
         FIG.  14    is a cross-sectional view of a portion of the intake manifold assembly shown in  FIG.  13    taken along plane D-D; 
         FIG.  15    is a cross-sectional view of the intake manifold assembly shown in  FIG.  13    taken along plane E-E; 
         FIG.  16    is a cross-sectional view of the intake manifold assembly shown in  FIG.  13    taken along plane F-F; 
         FIG.  17    is a rear view of a portion of the intake manifold assembly shown in  FIG.  12   ; 
         FIG.  18    is a perspective view of a portion of the intake manifold assembly of  FIG.  1   ; 
         FIG.  19    is a perspective view of a venturi of the intake manifold assembly of  FIG.  1   ; 
         FIG.  20    is a cross-sectional view of the venturi shown in  FIG.  19    taken along plane G-G; 
         FIG.  21    is a cross-sectional view of the venturi shown in  FIG.  19    taken along plane H-H; 
         FIG.  22    is a front view of the venturi shown in  FIG.  19   ; 
         FIG.  23    is a cross-sectional view of the venturi shown in  FIG.  22    taken along plane J-J; 
         FIG.  24    is a perspective view of an EGR gasket of the intake manifold assembly of  FIG.  1   ; 
         FIG.  25    is a perspective view of an upstream isolator of the intake manifold assembly of  FIG.  1   ; 
         FIG.  26    is a perspective view of an upstream plug of the intake manifold assembly of  FIG.  1   ; 
         FIG.  27    is a perspective view of another internal combustion engine system; 
         FIG.  28    is a perspective view of a portion of the intake manifold assembly of the internal combustion engine system shown in  FIG.  27   ; 
         FIG.  29    is a cross-sectional view of the elbow pipe shown in  FIG.  28    taken along plane K-K; 
         FIG.  30    is a cross-sectional view of a portion of the elbow pipe shown in  FIG.  28    taken along plane L-L; 
         FIG.  31    is a perspective view of an EGR adaptor of the internal combustion engine system of  FIG.  27   ; 
         FIG.  32    is a cross-sectional view of the EGR adaptor shown in  FIG.  31    taken along plane M-M; 
         FIG.  32    is a perspective view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  33    is another perspective view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  34    is another perspective view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  35    is another perspective view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  36    is front view of an EGR gasket shown in  FIG.  27   ; 
         FIG.  37    is a detailed view of DETAIL A in  FIG.  36   ; 
         FIG.  38    is a partially-exploded view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  39    is another partially-exploded view of a portion of the intake manifold assembly shown in  FIG.  27   ; 
         FIG.  40    is front view of an EGR throttle shown in  FIG.  27   ; 
         FIG.  41    is another perspective view of a portion of the intake manifold assembly shown in  FIG.  27   ; and 
         FIG.  42    is a cross-sectional view of a portion of the intake manifold assembly shown in  FIG.  27   . 
     
    
    
     It will be recognized that the Figures are schematic representations for purposes of illustration. The Figures are provided for the purpose of illustrating one or more implementations with the explicit understanding that the Figures will not be used to limit the scope or the meaning of the claims. 
     DETAILED DESCRIPTION 
     Following below are more detailed descriptions of various concepts related to, and implementations of, methods, apparatuses, and systems for providing air and exhaust gas to a cylinder head of an internal combustion engine. The various concepts introduced above and discussed in greater detail below may be implemented in any of a number of ways, as the described concepts are not limited to any particular manner of implementation. Examples of specific implementations and applications are provided primarily for illustrative purposes. 
     I. Overview 
     An internal combustion engine may include an EGR system. The EGR system provides exhaust gas back to an intake manifold of the internal combustion engine. The intake manifold combines intake air with the exhaust gas from the EGR system and provides the combined air and exhaust gas to the internal combustion engine. As a result, the internal combustion engine combusts fuel in combination with air and the exhaust gas. 
     The exhaust gas functions to reduce a relative amount of air in the combined air and exhaust gas provided to the internal combustion engine (e.g., compared to an internal combustion engine without an EGR system). The exhaust gas also functions to reduce a temperature of combustion (e.g., due to decreased air in the combined air and exhaust gas, etc.) within the internal combustion engine (e.g., compared to an internal combustion engine without an EGR system). In these ways, the production of undesirable byproducts (e.g., nitrogen oxides (NO x ), etc.) by the internal combustion engine may be reduced. 
     EGR systems can be relatively large and can undesirably protrude from a footprint of an internal combustion engine. As a result, it may be difficult or impossible to incorporate an EGR system in some applications, such as those with particularly stringent packaging requirements. 
     Implementations herein are directed to an internal combustion engine system that includes an intake manifold assembly which has a venturi coupled to an intake manifold body that is coupled to a cold side (e.g., intake side, etc.) of a cylinder head. The venturi receives exhaust gas from the cylinder head and provides the exhaust gas to the intake manifold body. The intake manifold body receives air and the exhaust gas, mixes the air and the exhaust gas, and provides the mixture of the air and the exhaust gas to the cylinder head. By coupling the venturi to the intake manifold body in this fashion, an overall footprint of the intake manifold assembly may be desirably reduced, which may enable the intake manifold assembly to be utilized in applications where differently sized systems, such as those where a concentrator is coupled to a hot side of a cylinder head, cannot be used. 
     II. Example Internal Combustion Engine System with Intake Manifold Assembly 
       FIG.  1    depicts an example internal combustion engine system  100 . The internal combustion engine system may be, for example, a diesel internal combustion engine system, a gasoline internal combustion engine system, a hybrid internal combustion engine system, a propane internal combustion engine system, a dual-fuel internal combustion engine system, a natural gas internal combustion engine system, etc. The internal combustion engine system  100  is configured to combust a fuel (e.g., diesel fuel, gasoline, propane, natural gas, etc.) to produce energy that may be utilized by various outputs. For example, the internal combustion engine system  100  may produce energy that is utilized to drive a movement member (e.g., wheel, tread, propeller, impeller, turbine, rotor, etc.) or power a generator. 
     The internal combustion engine system  100  includes an inlet conduit  102  (e.g., air conduit, etc.). The inlet conduit  102  receives air (e.g., ambient air, etc.) from an air source (e.g., air intake, air box, air filter, charge air cooler, etc.). As is explained in more detail herein, the air received by the inlet conduit  102  is compositionally distinct from exhaust gas produced by the internal combustion engine system  100 . The inlet conduit  102  does not receive exhaust gas. 
     The internal combustion engine system  100  also includes an intake manifold assembly  103 . As is explained in more detail herein, the intake manifold assembly  103  is configured to separately receive air and exhaust gas, mix the air and the exhaust gas, and provide the mixture of air and exhaust gas to cylinders of the internal combustion engine system  100 . 
     The intake manifold assembly  103  includes an inlet adaptor  104  (e.g., connector, etc.). As shown in  FIGS.  2  and  3   , the inlet adaptor  104  includes an adaptor body  106  (e.g., frame, etc.). The inlet adaptor  104  also includes an adaptor opening  108  (e.g., bore, etc.) extending through the adaptor body  106 . The adaptor opening  108  is configured to receive the air from the inlet conduit  102  and provide the air through the inlet conduit  102 . In various embodiments, the inlet conduit  102  is inserted within the adaptor opening  108 , and the inlet conduit  102  is secured to the adaptor body  106 . The inlet adaptor  104  also includes a breather aperture  110  (e.g., hole, opening, etc.). The breather aperture  110  extends through the adaptor body  106  and is contiguous with the adaptor opening  108 . As shown in  FIG.  3   , an inlet portion of the breather aperture  110  is oriented towards the inlet conduit  102 . As a result, some of the air flowing through the adaptor opening  108  flows into the breather aperture  110 . 
     Referring again to  FIG.  1   , the internal combustion engine system  100  also includes a breather conduit  112 . The breather conduit  112  is coupled to the adaptor body  106  around the adaptor opening  108  and is configured to receive the air from the breather aperture  110 . As shown in  FIGS.  1  and  4   , the internal combustion engine system  100  also includes a cylinder head  114 . As is explained in more detail herein, the cylinder head  114  facilitates combustion of the fuel and includes a breather system (e.g., jet pump system, vacuum system, etc.) that uses the air from the inlet adaptor  104  to maintain fluid (e.g., oil, etc.) at various locations within the internal combustion engine system  100 . The cylinder head  114  includes a breather inlet and the breather conduit  112  is coupled to the cylinder head  114  around the breather inlet. As a result, the breather system of the cylinder head  114  is configured to receive the air from the breather aperture  110 . 
     The intake manifold assembly  103  also includes an air throttle  116  (e.g., valve, throttle valve, electronic valve, intake throttle, valve assembly, etc.). The air throttle  116  includes an air throttle body  118  (e.g., frame, etc.). The air throttle body  118  is coupled to the inlet adaptor  104 . The air throttle  116  also includes an air throttle opening (e.g., bore, etc.) extending through the air throttle body  118 . The air throttle opening is configured to receive the air from the adaptor opening  108  and provide the air through the air throttle body  118 . 
     The air throttle  116  also includes an air throttle plate (e.g., valve member, etc.). The air throttle plate is disposed within the air throttle opening and is rotatable within the air throttle opening to control flow of the air through the air throttle opening. The air throttle  116  also includes an air throttle shaft. The air throttle shaft extends through at least a portion of the air throttle body  118  and is coupled to the air throttle plate such that the rotation of the air throttle shaft causes rotation of the air throttle plate within the air throttle opening. 
     The air throttle  116  also includes an air throttle actuator  117  (e.g., solenoid, linear actuator, rotary actuator, etc.). The air throttle actuator  117  is configured to cause rotation of the air throttle shaft and therefore rotation of the air throttle plate. The air throttle actuator  117  is operable between a first position, where the air throttle plate inhibits flow of the air through the air throttle body  118  (e.g., less than 1% of the air that is received by the air throttle opening flows between the air throttle plate and the air throttle body  118 , etc.), and a second position, where the air throttle plate does not inhibit flow of the air through the air throttle body  118 . 
     The intake manifold assembly  103  includes an intake manifold  120  (e.g., mixing manifold, etc.). The intake manifold  120  includes an intake manifold body  122  (e.g., frame, etc.). The intake manifold body  122  is coupled to a first side (e.g., cold side, intake side, etc.) of the cylinder head  114 . In various embodiments, the intake manifold body  122  is cast from a metal, such as aluminum. At least a portion of the intake manifold  120  may be coated with an anti-corrosive coating. 
     The intake manifold body  122  includes an air inlet body  124  (e.g., portion, etc.). The air inlet body  124  is coupled to the air throttle body  118 . The air inlet body  124  is configured to facilitate provision of the air from the air throttle  116  into the intake manifold  120 . The intake manifold body  122  also includes an air inlet  126  that extends through the air inlet body  124 . The air inlet  126  receives the air from the air throttle  116 . 
     The intake manifold body  122  also includes an outlet body  128  (e.g., portion, etc.) (shown in detail in  FIG.  7   ). As shown in  FIG.  4   , the outlet body  128  is contiguous with the air inlet body  124  and is coupled to the first side of the cylinder head  114 . The outlet body  128  includes an outlet body inner surface  130 . As is explained in more detail herein, the air and the exhaust gas flows within the outlet body  128  along the outlet body inner surface  130 . 
     The outlet body  128  also includes an outlet body opening  132  (e.g., aperture, hole, port, etc.). The outlet body opening  132  is disposed on the outlet body inner surface  130 . As is explained in more detail herein, the outlet body opening  132  facilitates flow of the exhaust gas into the outlet body  128 . The outlet body opening  132  may be variously shaped. In various embodiments, the outlet body opening  132  is elliptical. However, in other embodiments, the outlet body opening  132  is circular, oval, triangular, square, rectangular, hexagonal, pentagonal, or otherwise similarly shaped. 
     The outlet body  128  also includes an outlet body wall  134  (e.g., mixer, rib, projection, etc.). The outlet body wall  134  extends from the outlet body inner surface  130  and around at least a portion of the outlet body opening  132 . At least a portion of the outlet body wall  134  inhibits flow of the air across the outlet body opening  132 . The outlet body wall  134  also enables a portion of the air to flow around the outlet body opening  132 . Additionally, and as described in more detail herein, the outlet body wall  134  facilitates mixing of the air and the exhaust gas downstream of the outlet body opening  132 . By facilitating mixing of the exhaust gas and the air, a relatively concentration of the exhaust gas (in the mixture of the air and the exhaust gas) that is provided to one cylinder of the internal combustion engine system  100  may be approximately equal to a relatively concentration of the exhaust gas (in the mixture of the air and the exhaust gas) that is provided to another cylinder of the internal combustion engine system  100 . In this way, combustion in both cylinders may occur similarly (e.g., produce approximately equal heat, produce approximately equal power, etc.), which may mitigate wear of various components of the internal combustion engine system  100 . As a result, the internal combustion engine system  100  may be more desirable than other systems that do not facilitate mixing of exhaust gas and air. 
     In various embodiments, such as is shown in  FIG.  11   , the outlet body wall  134  extends entirely around the outlet body opening  132 . In these embodiments, the outlet body opening  132  may be elliptical. However, the outlet body opening  132  may also be circular, oval, triangular, square, rectangular, hexagonal, pentagonal, or otherwise similarly shaped. 
     In some embodiments, the outlet body wall  134  extends around only a portion (e.g., upstream portion, upstream half, etc.) of the outlet body opening  132 , etc.). In these embodiments, at least a portion of the outlet body wall  134  is disposed upstream of the outlet body opening  132 . This portion of the outlet body wall  134  inhibits flow of the air across the outlet body opening  132  and enables a portion of the air to flow around the outlet body opening  132 . For example, the outlet body wall  134  may extend around a portion of a circumference of the outlet body opening  132 , where the portion is approximately (e.g., within 5% of, etc.) in a range of 10% of the circumference of the outlet body opening  132  to 80% of the circumference of the outlet body opening  132 , inclusive. 
     The outlet body wall  134  is defined by a height that the outlet body wall  134  extends from the outlet body inner surface  130 . In various embodiments, the height of the outlet body wall  134  is approximately in a range of 25 millimeters (mm) to 50 mm, inclusive. In more particular embodiments, the height of the outlet body wall  134  is approximately in a range of 35 mm to 45 mm, inclusive. The outlet body  128  may be variously configured such that the effects of the outlet body wall  134  on the flow of the air within the outlet body  128  are tailored for a target application. 
     The intake manifold body  122  also includes an intake manifold outlet  136  that extends through the outlet body  128 . The intake manifold outlet  136  provides the air and the exhaust gas from the intake manifold body  122  to the cylinder head  114 . The cylinder head  114  is coupled to the outlet body  128  around the intake manifold outlet  136 . The mixture of the air and exhaust gas is provided from the outlet body  128  to the cylinder head  114  via the intake manifold outlet  136 . 
     The internal combustion engine system  100  includes a plurality of cylinders (e.g., two cylinders, four cylinders, five cylinders, six cylinders, seven cylinders, eight cylinders, nine cylinders, ten cylinders, twelve cylinders, fourteen cylinders, etc.) and a fuel system that provides fuel to each of the cylinders. The cylinder head  114  also provides the mixture of the air and the exhaust gas from the outlet body  128  to one or more of the cylinders. For example, where the internal combustion engine system  100  includes five cylinders, the cylinder head  114  provides the mixture of the air and the exhaust gas to one or more of the five cylinders. The internal combustion engine system  100  combusts the fuel and the mixture of the air and the exhaust gas, which produces exhaust gas. In some applications, one or more cylinders of the internal combustion engine system  100  do not receive exhaust gas and instead only receive air. For example, an internal combustion engine system  100  may include six cylinders, three of which receive air and exhaust gas, and three of which only receive air. 
     The internal combustion engine system  100  also includes an exhaust manifold  138  (e.g., outlet manifold, etc.). The exhaust manifold  138  is coupled to a second side (e.g., hot side, exhaust side, etc.) of the cylinder head  114  and is configured to receive the exhaust gas from the cylinder head  114 . The exhaust manifold  138  is configured to receive the exhaust gas from each of the cylinders of the internal combustion engine system  100 . The exhaust manifold  138  is coupled to an outlet exhaust gas conduit and configured to provide the exhaust gas to the outlet exhaust gas conduit. The outlet exhaust gas conduit may provide the exhaust gas to an aftertreatment system (e.g., a system that doses the exhaust gas with reductant and provides the exhaust gas through a catalyst member, etc.) and/or a filtration system (e.g., a particulate filter, etc.). In some embodiments, the internal combustion engine system  100  includes a turbocharger and the exhaust gas is provided from the exhaust manifold  138  to the turbocharger and from the turbocharger to the outlet exhaust gas conduit. 
     The intake manifold assembly  103  also includes an exhaust gas recirculation (EGR) system  140 . As is explained in more detail herein, the EGR system  140  provides the exhaust gas from the exhaust manifold  138  to the intake manifold  120 . The intake manifold assembly  103  provides the exhaust gas produced by the cylinders back into the cylinders, which reduces a temperature of combustion (e.g., due to relatively decreased proportion of air in the combined air and exhaust gas combusted in the cylinders, etc.). As a result, production of undesirable byproducts (e.g., nitrogen oxides (NO x ), etc.) by the internal combustion engine system  100  may be reduced compared to a system that does not provide exhaust gas to cylinders for combustion. 
     As shown in  FIG.  5   , the EGR system  140  includes an EGR elbow  142 . The EGR elbow  142  is coupled to the exhaust manifold  138  and is configured to receive the exhaust gas from the exhaust manifold  138 . The EGR system  140  also includes a fluid heat exchanger  144 . The fluid heat exchanger  144  is coupled to the EGR elbow  142  and is configured to receive the exhaust gas from the EGR elbow  142 . Additionally, the fluid heat exchanger  144  is configured to receive a fluid (e.g., engine coolant, etc.) from a fluid system of the internal combustion engine system  100 , facilitate exchange of heat from the exhaust gas to the fluid, and to provide the fluid back to the fluid system (e.g., after being heated by the exhaust gas, etc.). 
     The EGR system  140  also includes a transfer pipe  146 , as shown in  FIG.  1   . The transfer pipe  146  is coupled to the fluid heat exchanger  144  and is configured to receive the exhaust gas from the fluid heat exchanger  144 . The EGR system  140  also includes an upstream seal joint  148 . The upstream seal joint  148  is coupled to the transfer pipe  146 . The EGR system also includes a crossover pipe  150 . The crossover pipe  150  is coupled to the upstream seal joint  148  and is configured to receive exhaust gas from the transfer pipe  146  after the exhaust gas flows through the upstream seal joint  148 . In various embodiments, the upstream seal joint  148  is a spherical seal joint. As is also shown in  FIG.  1   , the EGR system  140  also includes a downstream seal joint  152 . The downstream seal joint  152  is coupled to the crossover pipe  150 . The EGR system  140  also includes an EGR adaptor  154 . The EGR adaptor is coupled to the downstream seal joint  152  and is configured to receive the exhaust gas from the crossover pipe  150  after the exhaust gas flows through the downstream seal joint  152 . In various embodiments, the downstream seal joint  152  is a spherical seal joint. 
     As shown in  FIG.  1   , the EGR system  140  also includes an EGR throttle  156  (e.g., valve, throttle valve, electronic valve, intake throttle, valve assembly etc.). The EGR throttle  156  includes an EGR throttle body  158  (e.g., frame, etc.). The EGR throttle body  158  is coupled to the EGR adaptor  154  and is configured to receive the exhaust gas from the EGR adaptor  154 . In various embodiments, the EGR throttle body  158  is made from aluminum. 
     As shown in  FIG.  14   , the EGR throttle  156  also includes an EGR throttle opening  160  (e.g., bore, etc.). The EGR throttle opening  160  extends through the EGR throttle body  158 . The EGR throttle opening  160  is configured to receive the exhaust gas from the EGR adaptor  154  and provide the exhaust gas through the EGR throttle body  158 . The EGR throttle  156  also includes an EGR throttle plate  162  (e.g., valve member, etc.). The EGR throttle plate  162  is disposed within the EGR throttle opening  160  and is rotatable within the EGR throttle opening  160  to control flow of the exhaust gas through the EGR throttle opening  160 . The EGR throttle  156  also includes an EGR throttle shaft  164 . The EGR throttle shaft  164  extends through at least a portion of the EGR throttle body  158  and is coupled to the EGR throttle plate  162  such that the rotation of the EGR throttle shaft  164  causes rotation of the EGR throttle plate  162  within the EGR throttle opening  160 . 
     The EGR throttle  156  also includes an EGR throttle actuator  166  (e.g., solenoid, linear actuator, rotary actuator, etc.), as shown in  FIG.  13   . The EGR throttle actuator  166  is configured to cause rotation of the EGR throttle shaft  164  and therefore rotation of the EGR throttle plate  162 . The EGR throttle actuator  166  is operable between a first position, where the EGR throttle plate  162  inhibits flow of the exhaust gas through the EGR throttle body  158  (e.g., less than 1% of the exhaust that is received by the EGR throttle opening  160  flows between the EGR throttle plate  162  and the EGR throttle body  158 , etc.), and a second position, where the EGR throttle plate  162  does not inhibit flow of the exhaust gas through the EGR throttle body  158 . 
     As shown in  FIG.  13   , the EGR system  140  also includes a venturi  168  (e.g., ejector, flow concentrator, etc.). The venturi  168  includes a venturi body  170  (e.g., frame, etc.). The venturi  168  also includes a venturi opening  172  (e.g., bore, etc.) extending through the venturi body  170 . The venturi opening  172  is configured to receive the exhaust gas from the EGR throttle opening  160  and provide the exhaust gas through the venturi  168 . The venturi opening  172  is centered on a venturi center axis  174  (e.g., a center point of the venturi opening  172  is disposed on the venturi center axis  174 , etc.). In some embodiments, the EGR throttle  156  is configured such that the EGR throttle shaft  164  is intersected by the venturi center axis  174 . For example, the EGR throttle plate  162  may be rotated around an axis (e.g., a center axis of the EGR throttle shaft  164 ) that is orthogonal to the venturi center axis  174  (e.g., when measured on a plane along which the venturi center axis  174  and the axis around which the EGR throttle plate  162  is rotated, etc.). As a result of this configuration, the EGR throttle  156  is operable to control flow of the exhaust gas through the venturi body  170 . 
     In some applications, the venturi  168  is made from stainless steel. For example, the venturi  168  may be cast from stainless steel. The venturi body  170  is defined by a wall thickness t W . In various embodiments, the wall thickness t W  is approximately in a range of 2 mm to 5 mm, inclusive. For example, the wall thickness t W  may be approximately equal to 3.5 mm. 
     As shown in  FIG.  24   , the EGR system  140  also includes an EGR gasket  175 . The EGR gasket  175  is disposed between the venturi body  170  and the EGR throttle body  158 . The EGR gasket  175  cooperates with the EGR throttle body  158  and the venturi body  170  to establish a seal (e.g., an exhaust gas-tight seal) between the venturi body  170  and the EGR throttle body  158 . 
     Referring to  FIG.  14   , the venturi body  170  includes an upstream cylindrical portion  176  (e.g., tubular portion, etc.). The upstream cylindrical portion  176  is immediately downstream of the EGR throttle  156  and is configured to receive the exhaust gas from the EGR throttle opening  160 . The upstream cylindrical portion  176  has an upstream cylindrical portion length L ucp  measured along the venturi center axis  174 . In various embodiments, the upstream cylindrical portion length L ucp  is approximately in a range of 120 mm to 160 mm, inclusive. For example, the upstream cylindrical portion length L ucp  may be approximately equal to 144 mm. The upstream cylindrical portion  176  also has an upstream cylindrical portion diameter d ucp  that is substantially constant along the upstream cylindrical portion length L ucp . As used herein, “substantially constant” is intended to describe a value that varies by less than 5%. For example, where a value is 100 mm that is substantially constant along a distance, the value may also be 95 mm at one location along the distance, 100 mm at another location along the distance, and 105 mm at yet another location along the distance. In various embodiments, the upstream cylindrical portion diameter d ucp  is approximately in a range of 40 mm to 70 mm, inclusive. For example, the upstream cylindrical portion diameter d ucp  may be approximately equal to 56 mm. 
     As is shown in  FIG.  14   , the venturi body  170  also includes a highside passageway  177  (e.g., bore, port, aperture, etc.). The highside passageway  177  is separated from a downstream end of the upstream cylindrical portion  176  by a highside passageway length L hp . The highside passageway length L hp  is approximately in a range of 18 mm to 26 mm, inclusive. The highside passageway length L hp  may be approximately equal to 22 mm. The highside passageway  177  may facilitate mass measurement of the exhaust gas (e.g., in conjunction with a sensor coupled to the venturi body  170 , etc.). The highside passageway  177  may also facilitate measurement of pressure the exhaust gas. The highside passageway  177  can be formed by various processes, such as boring, drilling, additive manufacturing (e.g., where material is intentionally not added in a volume so as to form the highside passageway  177 , etc.), and other similar processes. 
     The highside passageway  177  facilitates flow of the exhaust gas from the upstream cylindrical portion  176  through the venturi body  170  and out of the venturi  168 . The highside passageway  177  is centered on an axis that is angularly separated from a horizontal axis (that is orthogonal to the venturi center axis  174 ) by an angular separation. In various embodiments, the angular separation is approximately equal to 12°. The angular separation may facilitate drainage of condensation from the highside passageway  177 . 
     The venturi body  170  also includes a convergent portion  178  (e.g., sloped portion, etc.), as shown in  FIG.  14   . The convergent portion  178  is contiguous with the upstream cylindrical portion  176  and is configured to receive the exhaust gas from the upstream cylindrical portion  176 . The convergent portion  178  has a convergent portion length L cp  measured along the venturi center axis  174 . In various embodiments, the convergent portion length L cp  is approximately in a range of 20 mm to 50 mm, inclusive. For example, the convergent portion length L cp  may be approximately equal to 35 mm. In other applications, the convergent portion length L cp  may be approximately equal to 28 mm, 29 mm, 30 mm, or 31 mm. The convergent portion  178  extends from the upstream cylindrical portion  176  towards the venturi center axis  174 . Thus, the slope of the convergent portion  178  is negative and a convergent portion diameter d cp  of the convergent portion  178  decreases along the convergent portion length L cp . The convergent portion length L cp  is less than the upstream cylindrical portion length L ucp . 
     In various embodiments, such as is shown in  FIG.  14   , the slope of the convergent portion  178  varies along the convergent portion length L cp . Specifically, the slope of the convergent portion  178  is greatest proximate an inlet end and an outlet end of the convergent portion  178 , and is least proximate a middle of the convergent portion  178 . As a result, the convergent portion  178  gradually converges towards the venturi center axis  174  (proximate the inlet end of the convergent portion  178 ), rapidly converges towards the venturi center axis  174  (proximate the middle of the convergent portion  178 ), and then gradually converses towards the venturi center axis  174  (proximate the outlet end of the convergent portion  178 ). 
     In various embodiments, a minimum angle α cp  of the convergent portion  178  relative to the venturi center axis  174  is approximately in a range of 280 degrees (°) to 320°, inclusive. The minimum angle α cp  is located at the middle of the convergent portion  178 . For example, the minimum angle α cp  may be approximately equal to 294 °. 
     As shown in  FIG.  14   , the venturi body  170  also includes a downstream cylindrical portion  180  (e.g., tubular portion, orifice, throat, etc.). The downstream cylindrical portion  180  is contiguous with the convergent portion  178  and is configured to receive the exhaust gas from the convergent portion  178 . The downstream cylindrical portion  180  has a downstream cylindrical portion length L dcp  measured along the venturi center axis  174 . In various embodiments, the downstream cylindrical portion length L dcp  is approximately in a range of 20 mm to 45 mm, inclusive. For example, the downstream cylindrical portion length L dcp  may be approximately equal to 32 mm. In other applications, the downstream cylindrical portion length L dcp  may be approximately equal to 28 mm, 29 mm, 30 mm, or 31 mm. The downstream cylindrical portion length L dcp  is less than the upstream cylindrical portion length L ucp . In some embodiments, the downstream cylindrical portion length L dcp  is less than the convergent portion length L cp . 
     Referring to  FIG.  14   , the downstream cylindrical portion  180  also has a downstream cylindrical portion diameter d dcp  that is substantially constant along the downstream cylindrical portion length L dcp . In some embodiments, the downstream cylindrical portion diameter d dcp  is approximately equal to the downstream cylindrical portion length L dcp . The downstream cylindrical portion diameter d dcp  is less than the upstream cylindrical portion diameter d ucp . In various embodiments, the downstream cylindrical portion diameter d dcp  is approximately in a range of 45% of the upstream cylindrical portion diameter d ucp  and 65% of the upstream cylindrical portion diameter d ucp , inclusive. For example, the downstream cylindrical portion diameter d dcp  may be approximately equal to 57% of the upstream cylindrical portion diameter d ucp . In various embodiments, the downstream cylindrical portion diameter d dcp  is approximately in a range of 20 mm to 45 mm, inclusive. For example, the downstream cylindrical portion diameter d dcp  may be approximately equal to 32 mm. 
     As shown in  FIG.  23   , the venturi body  170  also includes a slot portion  181 . The slot portion  181  is contiguous with the downstream cylindrical portion  180  and extends over a portion of the downstream cylindrical portion  180 . As a result, the slot portion  181  functions to provide a gap around a portion of the downstream cylindrical portion  180 . The slot portion  181  assists in providing accurate and desirable measurements of pressure changes when EGR flow is traveling backwards (e.g., from the divergent portion  182  to the upstream cylindrical portion  176 ). 
     The venturi body  170  also includes a divergent portion  182  (e.g., sloped portion, etc.), as shown in  FIG.  14   . The divergent portion  182  is contiguous with the downstream cylindrical portion  180  and the slot portion  181 . The slot portion  181  extends over a portion of the divergent portion  182 , as shown in  FIG.  23   . The divergent portion  182  is configured to receive the exhaust gas from the downstream cylindrical portion  180 . The divergent portion  182  has a divergent portion length L dp  measured along the venturi center axis  174 . In various embodiments, the divergent portion length L dp  is approximately in a range of 90 mm to 150 mm, inclusive. For example, the divergent portion length L dp  may be approximately equal to 137 mm. The divergent portion  182  extends from the downstream cylindrical portion  180  away from the venturi center axis  174 . Thus, the slope of the divergent portion  182  is positive and a divergent portion diameter d dp  of the divergent portion  182  increases along the divergent portion length L dp . In various embodiments, the slope of the divergent portion  182  is substantially constant along the divergent portion length L dp  and the divergent portion  182  is angularly separated from the venturi center axis  174  by a divergent portion angle α dp . In various embodiments, the divergent portion angle α dp  is approximately in a range of 5° to 15°, inclusive. For example, the divergent portion angle α dp  may be approximately equal to 10°. The divergent portion length L dp  is greater than the convergent portion length L cp  and the downstream cylindrical portion length L dcp . In various embodiments, the divergent portion length L dp  is less than the upstream cylindrical portion length L ucp . 
     The venturi body  170  is coupled to the intake manifold body  122 . As a result, the venturi body  170  is coupled to the cylinder head  114  via the intake manifold body  122 . However, as is explained in more detail herein, the coupling between the venturi body  170  and the intake manifold body  122  is configured to mitigate transfer of vibrations from the cylinder head  114  to the venturi body  170  (e.g., by achieving a target modal frequency, etc.). Additionally, the coupling between the venturi body  170  and the intake manifold body  122  supports the venturi body  170  on both an upstream end of the venturi body  170  and a downstream end of the venturi body  170 , which ensures prolonged desirable operation of the internal combustion engine system  100 . 
     As shown in  FIG.  14   , the intake manifold body  122  also includes an upstream intake flange  184  (e.g., ring, collar, etc.). The upstream intake flange  184  includes an upstream intake flange aperture  186  (e.g., hole, etc.). The upstream intake flange aperture  186  is directed towards the cylinder head  114  when the intake manifold body  122  is coupled to the cylinder head  114 . The intake manifold body  122  also includes an upstream boss  188  (e.g., projection, etc.), as shown in  FIG.  13   . The upstream boss  188  includes an upstream boss aperture  190  (e.g., hole, etc.). The upstream boss aperture  190  is directed towards the cylinder head  114  when the intake manifold body  122  is coupled to the cylinder head  114 . The upstream boss  188  is configured such that the upstream boss aperture  190  is aligned with the upstream intake flange aperture  186 . The upstream boss aperture  190  has a diameter that is smaller than a diameter of the upstream intake flange aperture  186 . 
     The venturi body  170  also includes an upstream venturi flange  192  (e.g., ring, flange, etc.), as shown in  FIG.  14   . The upstream venturi flange  192  is configured to be received between the upstream intake flange  184  and the upstream boss  188 . The upstream venturi flange  192  includes a upstream venturi flange aperture  194  (e.g., hole, etc.). The upstream venturi flange aperture  194  is directed towards the cylinder head  114  when the venturi body  170  is coupled to the intake manifold body  122  and the intake manifold body  122  is coupled to the cylinder head  114 . The upstream venturi flange  192  is configured such that the upstream venturi flange aperture  194  is aligned with the upstream boss aperture  190  and the upstream intake flange aperture  186  when the venturi body  170  is coupled to the intake manifold body  122  and the intake manifold body  122  is coupled to the cylinder head  114 . The upstream venturi flange  192  has a diameter that is smaller than a diameter of the upstream intake flange aperture  186  and is approximately equal to a diameter of the upstream boss aperture  190 . 
     Referring to  FIG.  14   , the intake manifold assembly  103  also includes an upstream fastener  196  (e.g., bolt, screw, etc.). As is explained in more detail herein, the upstream fastener  196  is configured to facilitate coupling of the intake manifold body  122  to the venturi body  170  using the upstream intake flange  184 , the upstream boss  188 , and the upstream venturi flange  192 . The upstream intake flange aperture  186 , the upstream boss aperture  190 , and the upstream venturi flange aperture  194  are configured to receive the upstream fastener  196 . The upstream boss aperture  190  is configured to threadably engage the upstream fastener  196 . For example, the upstream fastener  196  may be inserted through the upstream intake flange aperture  186  and the upstream venturi flange aperture  194  and threaded into the upstream boss aperture  190 . 
     The intake manifold assembly  103  also includes an upstream isolator  198  (e.g., mounting spacer, vibrational isolator, bushing, spacer, split ring, etc.), as shown in  FIG.  13   . The upstream isolator  198  is configured to be received within the upstream intake flange aperture  186 . As shown in  FIG.  25   , the upstream isolator  198  includes a upstream isolator aperture  200  (e.g., hole, etc.). The upstream isolator aperture  200  is configured to receive the upstream fastener  196  when the upstream isolator  198  is received within the upstream intake flange aperture  186 . The upstream isolator  198  is configured to mitigate transfer of vibrations from the cylinder head  114  to the venturi body  170  by mitigating transfer of vibrations from the upstream intake flange  184  to the upstream venturi flange  192 . 
     In various embodiments, the upstream venturi flange aperture  194  is configured such that the upstream fastener  196  does not threadably engage the upstream venturi flange aperture  194 . Similarly, in various embodiments, the upstream isolator aperture  200  is configured such that the upstream fastener  196  does not threadably engage the upstream isolator aperture  200 . 
     As shown in  FIG.  14   , the intake manifold body  122  also includes a downstream intake flange  202  (e.g., ring, flange, etc.). The downstream intake flange  202  includes a downstream intake flange aperture  204  (e.g., hole, etc.). The downstream intake flange aperture  204  is directed towards the cylinder head  114  when the intake manifold body  122  is coupled to the cylinder head  114 . The intake manifold body  122  also includes a downstream boss  206  (e.g., projection, etc.), as shown in  FIG.  13   . The downstream boss  206  includes a downstream boss aperture  208  (e.g., hole, etc.). The downstream boss aperture  208  is directed towards the cylinder head  114  when the intake manifold body  122  is coupled to the cylinder head  114 . The downstream boss  206  is configured such that the downstream boss aperture  208  is aligned with the downstream intake flange aperture  204 . The downstream boss aperture  208  has a diameter that is smaller than a diameter of the downstream intake flange aperture  204 . 
     As shown in  FIG.  14   , the venturi body  170  also includes a downstream venturi flange  210  (e.g., ring, collar, bolted joint, etc.). The downstream venturi flange  210  is configured to be received between the downstream intake flange  202  and the downstream boss  206 . The downstream venturi flange  210  includes a downstream venturi flange aperture  212  (e.g., hole, etc.). The downstream venturi flange aperture  212  is directed towards the cylinder head  114  when the venturi body  170  is coupled to the intake manifold body  122  and the intake manifold body  122  is coupled to the cylinder head  114 . The downstream venturi flange  210  is configured such that the downstream venturi flange aperture  212  is aligned with the downstream boss aperture  208  and the downstream intake flange aperture  204  when the venturi body  170  is coupled to the intake manifold body  122  and the intake manifold body  122  is coupled to the cylinder head  114 . The upstream venturi flange  192  has a diameter that is smaller than a diameter of the upstream intake flange aperture  186  and is approximately equal to a diameter of the downstream boss aperture  208 . 
     The intake manifold assembly  103  also includes a downstream fastener  214  (e.g., bolt, screw, etc.), as shown in  FIG.  14   . As is explained in more detail herein, the downstream fastener  214  is configured to facilitate coupling of the intake manifold body  122  to the venturi body  170  using the downstream intake flange  202 , the downstream boss  206 , and the upstream venturi flange  192 . The downstream intake flange aperture  204 , the downstream boss aperture  208 , and the upstream venturi flange aperture  194  are configured to receive the downstream fastener  214 . The downstream boss aperture  208  is configured to threadably engage the downstream fastener  214 . For example, the downstream fastener  214  may be inserted through the downstream intake flange aperture  204  and the upstream venturi flange aperture  194  and threaded into the downstream boss aperture  208 . 
     As shown in  FIG.  13   , the intake manifold assembly  103  also includes a downstream isolator  216  (e.g., mounting spacer, vibrational isolator, bushing, spacer, split ring, etc.). The downstream isolator  216  is configured to be received within the downstream intake flange aperture  204 . The downstream isolator  216  includes a downstream isolator aperture (e.g., hole, etc.). The downstream isolator aperture is configured to receive the downstream fastener  214  when the downstream isolator  216  is received within the downstream intake flange aperture  204 . The downstream isolator  216  is configured to mitigate transfer of vibrations from the cylinder head  114  to the venturi body  170  by mitigating transfer of vibrations from the downstream intake flange  202  to the downstream venturi flange  210 . 
     In various embodiments, the downstream venturi flange aperture  212  is configured such that the downstream fastener  214  does not threadably engage the downstream venturi flange aperture  212 . Similarly, in various embodiments, the downstream isolator aperture is configured such that the downstream fastener  214  does not threadably engage the downstream isolator aperture. 
     As shown in  FIG.  20   , the highside passageway  177  includes an highside passageway recess  222  (e.g., hole, drilling, etc.). The highside passageway recess  222  is contiguous with (e.g., extends to, etc.) an exterior surface (e.g., outer surface, etc.) of the venturi  168 . The highside passageway recess  222  can be formed by various processes, such as boring, drilling, additive manufacturing (e.g., where material is intentionally not added in a volume so as to form the highside passageway recess  222 , etc.), and other similar processes. The highside passageway recess  222  can receive a plug, as described herein, for preventing flow from the highside passageway  177  out of the highside passageway  177  (e.g., via a leak, etc.). 
     The venturi  168  also includes a sensor mount  223  (e.g., sensor pad, etc.). The sensor mount  223  is configured to be coupled to a sensor (e.g., pressure sensor, etc.) such that the sensor is capable of obtaining a reading of a parameter (e.g., pressure, etc.) of the exhaust gas within the venturi  168 . The highside passageway  177  facilitates transfer of the exhaust gas to the sensor mount  223  such that a sensor coupled to the sensor mount  223  is capable of obtaining a reading of a parameter of the exhaust gas within the venturi  168 . 
     The venturi  168  also includes an upstream interior passageway  224  (e.g., hole, drilling, etc.), as shown in  FIG.  20   . The upstream interior passageway  224  extends through the venturi body  170  and is contiguous with the highside passageway  177 . The upstream interior passageway  224  is centered on an axis that is angularly separated from the axis on which the highside passageway  177  is centered. In some embodiments, the angular separation is approximately equal to 43°. The angular separation may facilitate drainage of condensation from the upstream interior passageway  224 . The upstream interior passageway  224  can be formed by various processes, such as boring, drilling, additive manufacture (e.g., where material is intentionally not added in a volume so as to form the upstream interior passageway  224 , etc.), and other similar processes. The upstream interior passageway  224  facilitates transfer of the exhaust gas to the sensor mount  223  such that a sensor coupled to the sensor mount  223  is capable of obtaining a reading of a parameter of the exhaust gas within the venturi  168 . 
     As shown in  FIG.  21   , the venturi  168  also includes a downstream exterior passageway  226  (e.g., bore, hole, drilling, etc.). The downstream exterior passageway  226  extends through the venturi body  170  and is contiguous with the upstream cylindrical portion  176 . The downstream exterior passageway  226  can be formed by various processes, such as boring, drilling, additive manufacturing (e.g., where material is intentionally not added in a volume so as to form the downstream exterior passageway  226 , etc.), and other similar processes. The downstream exterior passageway  226  facilitates transfer of the exhaust gas to the sensor mount  223  such that a sensor coupled to the sensor mount  223  is capable of obtaining a reading of a parameter of the exhaust gas within the venturi  168 . 
     The downstream exterior passageway  226  includes a downstream passageway recess  228  (e.g., bore, hole, drilling, etc.). The downstream passageway recess  228  is contiguous with an exterior surface of the venturi  168 . As a result, the downstream exterior passageway  226  facilitates flow of the exhaust gas from the upstream cylindrical portion  176  through the venturi body  170  and out of the venturi  168 . The downstream exterior passageway  226  is centered on an axis that is angularly separated from a horizontal axis (that is orthogonal to the venturi center axis  174 ) by an angular separation. In various embodiments, the angular separation is approximately equal to 12°. The angular separation may facilitate drainage of condensation from the downstream exterior passageway  226 . The downstream passageway recess  228  can be formed by various processes, such as boring, drilling, additive manufacturing (e.g., where material is intentionally not added in a volume so as to form the downstream passageway recess  228 , etc.), and other similar processes. 
     The venturi  168  also includes a downstream interior passageway  230  (e.g., bore, hole, drilling, etc.), as shown in  FIG.  21   . The downstream interior passageway  230  extends through the venturi body  170  and is contiguous with the downstream exterior passageway  226 . The downstream interior passageway  230  is centered on an axis that is angularly separated from the axis on which the downstream exterior passageway  226  is centered. In some embodiments, the angular separation is approximately equal to 43°. The angular separation may facilitate drainage of condensation from the downstream interior passageway  230 . The downstream interior passageway  230  can be formed by various processes, such as boring, drilling, additive manufacturing (e.g., where material is intentionally not added in a volume so as to form the downstream interior passageway  230 , etc.), and other similar processes. The downstream interior passageway  230  facilitates transfer of the exhaust gas to the sensor mount  223  such that a sensor coupled to the sensor mount  223  is capable of obtaining a reading of a parameter of the exhaust gas within the venturi  168 . In various embodiments, the slot portion  181  assists the downstream exterior passageway  226  and the downstream interior passageway  230  in measuring pressure at the downstream cylindrical portion  180 . 
     As shown in  FIG.  12   , the intake manifold assembly  103  also includes an upstream plug  232  (e.g., port plug, etc.). The upstream plug  232  includes an upstream plug body  234 . The upstream plug body  234  is configured to be received within the highside passageway recess  222 . The upstream plug body  234  includes an upstream plug groove  236  (e.g., recess, etc.). The upstream plug  232  also includes an upstream plug seal member  238  (e.g., O-ring, etc.). The upstream plug seal member  238  is configured to be received in the upstream plug groove  236 . The upstream plug seal member  238  is configured to cooperate with the highside passageway recess  222  to establish a seal (e.g., exhaust gas-tight seal, etc.) between the upstream plug  232  and the highside passageway recess  222 . The seal may prevent flow of the exhaust gas out of the highside passageway recess  222 . 
     The intake manifold assembly  103  also includes a downstream plug  240  (e.g., port plug, etc.), as shown in  FIG.  13   . The downstream plug  240  includes a downstream plug body. The downstream plug body is configured to be received within the downstream passageway recess  228 . The downstream plug body includes an upstream plug groove  236  (e.g., recess, etc.). The downstream plug  240  also includes a downstream plug seal member (e.g., O-ring, etc.). The downstream plug seal member is configured to be received in the upstream plug groove  236 . The downstream plug seal member is configured to cooperate with the downstream passageway recess  228  to establish a seal (e.g., exhaust gas-tight seal, etc.) between the downstream plug  240  and the downstream passageway recess  228 . The seal may prevent flow of the exhaust gas out of the downstream passageway recess  228 . 
     As shown in  FIG.  13   , the intake manifold body  122  also includes an exhaust gas inlet body  242  (e.g., portion, etc.). The exhaust gas inlet body  242  is contiguous with the air inlet body  124  and the outlet body  128 . The exhaust gas inlet body  242  is coupled to the venturi body  170 . The exhaust gas inlet body  242  is configured to receive the exhaust gas from the divergent portion  182  and is configured to provide the exhaust gas to the outlet body opening  132 . The exhaust gas inlet body  242  is elbow-shaped. This elbow shape facilitates redirection of the exhaust gas. 
     The outlet body  128  is configured to facilitate mixing of the exhaust gas, provided from the exhaust gas inlet body  242  to the outlet body opening  132 , with the air, provided by the air inlet body  124 . The outlet body wall  134  is configured to facilitate mixing of the air and the exhaust gas within the outlet body. The outlet body wall  134  is also configured to facilitate flow of the air from the air inlet body  124  into the exhaust gas inlet body  242 . 
     The intake manifold assembly  103  also includes a seal member  244  (e.g., O-ring, etc.), as shown in  FIG.  13   . The seal member  244  is disposed between the exhaust gas inlet body  242  and the venturi body  170 . The seal member  244  is configured to cooperate with the exhaust gas inlet body  242  and the venturi body  170  to establish a seal (e.g., exhaust gas-tight seal, etc.) between the exhaust gas inlet body  242  and the venturi body  170 . In various embodiments, the seal member  244  is a radial seal member. 
     As shown in  FIG.  15   , the intake manifold assembly  103  also includes a temperature sensor assembly  246  (e.g., exhaust gas temperature sensor assembly, etc.). The temperature sensor assembly  246  is configured to facilitate measurement of a temperature of the exhaust gas within the exhaust gas inlet body  242 . The temperature sensor assembly  246  includes a probe  248  (e.g., sensor tip, pipe, etc.). The probe  248  is centered on an axis that is angularly separated from a horizontal axis (that is orthogonal to the venturi center axis  174 ) by an angular separation. In various embodiments, the angular separation is approximately equal to 10°. The angular separation may facilitate drainage of condensation from the probe  248 . 
     In some embodiments, the intake manifold  120  is integrally formed via additive manufacturing. For example, the intake manifold  120  may be integrally formed using 3D printing, selective laser sintering, selective laser melting (SLM), direct metal laser sintering (DMLS), electron beam melting (EBM), ultrasonic additive manufacturing (UAM), fused deposition modeling (FDM), fused filament fabrication (FFF), stereolithography (SLA), material jetting, binder jetting or other similar processes. As explained above, the air inlet body  124 , the outlet body  128 , and the exhaust gas inlet body  242  are formed and joined together as part of a single manufacturing step (e.g., 3D printing, selective laser sintering, SLM, DMLS, EBM, UAM, FDM, FFF, SLA, material jetting, binder jetting, etc.) to a create a single-piece or unitary construction, the air inlet body  124 , the outlet body  128 , and the exhaust gas inlet body  242 , that cannot be disassembled without an at least partial destruction of the air inlet body  124 , the outlet body  128 , and the exhaust gas inlet body  242 . For example, the portions of the air inlet body  124 , the outlet body  128 , and the exhaust gas inlet body  242  are: (i) not separable from each other (e.g., one portion of the air inlet body  124 , the outlet body  128 , and/or the exhaust gas inlet body  242  cannot be separated from the air inlet body  124 , the outlet body  128 , and/or the exhaust gas inlet body  242  without destroying the air inlet body  124 , the outlet body  128 , and the exhaust gas inlet body  242 , etc.); (ii) not formed separately from each other (e.g., the portions of the air inlet body  124 , the outlet body  128 , and/or the exhaust gas inlet body  242  are formed simultaneously, the portions of the air inlet body  124 , the outlet body  128 , and/or the exhaust gas inlet body  242  are formed as a single component in a single process, etc.); and (iii) there are no gaps or joints along borders between contiguous portions of the air inlet body  124 , the outlet body  128 , and/or the exhaust gas inlet body  242  (e.g., portions that share a border, etc.). 
     It is understood that alternatively or in addition to coupling to the cylinder head  114 , the various components of the intake manifold assembly  103  may be coupled to a cylinder block of the internal combustion engine system  100 . 
       FIGS.  27 - 43    depict the internal combustion engine system  100  according to other various embodiments. As shown in  FIG.  27   , the intake manifold assembly  103  includes an elbow pipe  2700  (e.g., transfer casting, etc.). The elbow pipe  2700  is coupled to the fluid heat exchanger  144  and is configured to receive the exhaust gas from the fluid heat exchanger  144 . The elbow pipe  2700  functions as both the crossover pipe  150  and the transfer pipe  146  described herein. Thus, the elbow pipe  2700  eliminates the upstream seal joint  148  which enhances sealing of the exhaust gas within the intake manifold assembly  103 . In various embodiments, the elbow pipe  2700  is cast from a metal, such as aluminum. 
     The intake manifold assembly  103  also includes an upstream elbow seal member  2702  (e.g., O-ring, etc.), as shown in  FIG.  28   . The upstream elbow seal member  2702  is disposed between the elbow pipe  2700  and the fluid heat exchanger  144 . The upstream elbow seal member  2702  is configured to cooperate with the elbow pipe  2700  and the fluid heat exchanger  144  to establish a seal (e.g., exhaust gas-tight seal, etc.) between the elbow pipe  2700  and the fluid heat exchanger  144 . In various embodiments, the upstream elbow seal member  2702  is a radial seal member. 
       FIGS.  29  and  30    illustrate the elbow pipe  2700  in greater detail. The elbow pipe  2700  includes an elbow pipe inlet  2703  (e.g., inlet fitting, etc.). The elbow pipe inlet  2703  is configured to receive the upstream elbow seal member  2702 . In some embodiments, the elbow pipe inlet  2703  has a diameter that is approximately equal to between 40 mm and 80 mm, inclusive. For example, the elbow pipe inlet  2703  may have a diameter that is approximately equal to 62 mm. In some embodiments, the elbow pipe inlet  2703  is coated with a coating, such as a green coating, that protects the elbow pipe  2700  against corrosion. The elbow pipe inlet  2703  is centered on an elbow pipe inlet axis  2704 . As is explained in more detail herein, the elbow pipe  2700  is contoured such that a portion (e.g., upstream portion, etc.) of the elbow pipe  2700  is centered on the elbow pipe inlet axis  2704  and a portion (e.g., downstream portion, etc.) of the elbow pipe  2700  curved away from the elbow pipe inlet axis  2704  to redirect the exhaust gas away from the elbow pipe inlet axis  2704 . 
     The elbow pipe  2700  also includes an elbow pipe outlet  2706  (e.g., outlet fitting, etc.). The elbow pipe outlet  2706  is configured to receive the seal member  244 . In some embodiments, the elbow pipe outlet  2706  has a diameter that is approximately equal to between 40 mm and 80 mm, inclusive. For example, the elbow pipe outlet  2706  may have a diameter that is approximately equal to 62 mm. In some embodiments, the elbow pipe outlet  2706  is coated with a coating, such as a green coating, that protects the elbow pipe  2700  against corrosion. 
     The elbow pipe outlet  2706  is centered on an elbow pipe outlet axis  2708 . The elbow pipe outlet axis  2708  does not intersect the elbow pipe inlet axis  2704 . Instead, the elbow pipe  2700  curves around an elbow (e.g., corner, etc.) between the elbow pipe inlet  2703  and the elbow pipe outlet  2706  and also curved away from the elbow pipe inlet axis  2704  and towards the elbow pipe outlet axis  2708 . As a result, the exhaust gas is both redirected around the corner and vertically towards the elbow pipe outlet  2706 . Such an arrangement may be beneficial in accounting for packaging constraints on the intake manifold assembly  103 . A separation S 1  between the elbow pipe inlet axis  2704  and the elbow pipe outlet axis  2708  may be measured along a plane along which the elbow pipe inlet axis  2704  extends, the elbow pipe outlet axis  2708  intersects, and the elbow pipe outlet axis  2708  is orthogonal to. In various embodiments, the elbow pipe  2700  is configured such that the separation Si is approximately equal to between 10 mm and 40 mm, inclusive. For example, the elbow pipe  2700  may be configured such that the separation S 1  is approximately equal to 23 mm. 
     In these embodiments, the intake manifold assembly  103  does not include the downstream seal joint  152 . Instead, the intake manifold assembly  103  also includes an downstream elbow seal member  2710  (e.g., O-ring, etc.), as shown in  FIG.  28   . The downstream elbow seal member  2710  is disposed between the elbow pipe  2700  and the EGR adaptor  154 . The downstream elbow seal member  2710  is configured to cooperate with the elbow pipe  2700  and the EGR adaptor  154  to establish a seal (e.g., exhaust gas-tight seal, etc.) between the elbow pipe  2700  and the EGR adaptor  154 . In various embodiments, the downstream elbow seal member  2710  is a radial seal member. 
     The elbow pipe  2700  also includes an elbow pipe outlet flange  2712  (e.g., rib, protrusion, etc.). The elbow pipe outlet flange  2712  is disposed proximate the elbow pipe outlet  2706  and is configured to facilitate coupling between the elbow pipe  2700  and the EGR adaptor  154 . The elbow pipe outlet flange  2712  includes an elbow pipe aperture  2714  (e.g., bore, etc.). As is explained in more detail herein, the elbow pipe aperture  2714  is configured to receive an elbow pipe fastener  2716  (e.g., cap screw, etc.) which couples the elbow pipe  2700  and the EGR adaptor  154 . In some embodiments, the elbow pipe aperture  2714  is threaded and is configured to threadably engage the elbow pipe fastener  2716 . 
     The EGR adaptor  154  in these embodiments differs in certain respects from the EGR adaptor  154  utilized in the intake manifold assembly  103  described in  FIGS.  1 - 26   . Specifically, as shown in  FIG.  31   , the EGR adaptor  154  is elongated, configured to receive the downstream elbow seal member  270 , and includes a pry bar  2718  (e.g., rib, flange, etc.). The pry bar  2718  is configured to facilitate interaction of a tool (e.g., screwdriver, etc.) with the EGR adaptor  154  so that a user can bias the EGR adaptor  154  towards the elbow pipe  2700  to compress the downstream elbow seal member  2710  between the EGR adaptor  154  and the elbow pipe  2700 . 
     Similar to the elbow pipe  2700 , the EGR adaptor  154  also includes an EGR adaptor inlet flange  2720  (e.g., rib, protrusion, etc.), as shown in  FIGS.  33 - 35   . The EGR adaptor inlet flange  2720  is disposed proximate an inlet of the EGR adaptor  154  and is configured to facilitate coupling between the elbow pipe  2700  and the EGR adaptor  154 . The EGR adaptor inlet flange  2720  includes an EGR adaptor inlet flange aperture  2722  (e.g., bore, etc.). As is explained in more detail herein, the EGR adaptor inlet flange aperture  2722  is configured to receive the elbow pipe fastener  2716  which couples the elbow pipe  2700  and the EGR adaptor  154 . In some embodiments, the EGR adaptor inlet flange aperture  2722  is threaded and is configured to threadably engage the elbow pipe fastener  2716 . 
     The EGR adaptor  154  also includes an EGR adaptor outlet flange  2724  (e.g., rib, protrusion, etc.). The EGR adaptor outlet flange  2724  is disposed proximate an outlet of the EGR adaptor  154  and is configured to facilitate coupling between the EGR adaptor  154 , the venturi  168 , and the EGR throttle  156  such that the EGR throttle  156  can be decoupled from the EGR adaptor  154  and the venturi  168  while the EGR adaptor  154  remains coupled to the venturi. 
     As shown in  FIGS.  31  and  32   , the EGR adaptor outlet flange  2724  includes one or more EGR adaptor outlet flange apertures  2726  (e.g., bore, etc.). As is explained in more detail herein, the EGR adaptor outlet flange apertures  2726  are each configured to receive an EGR adaptor fastener  2728 . In some embodiments, at least one of the EGR adaptor outlet flange apertures  2726  is threaded and is configured to threadably engage one of the EGR adaptor fasteners  2728 . The EGR adaptor outlet flange  2724  also includes one or more EGR adaptor outlet flange slots  2730  (e.g., channels, etc.). As is explained in more detail herein, the EGR adaptor outlet flange slots  2730  are each configured to receive one of the EGR adaptor fasteners  2728 . 
     In these embodiments, the EGR gasket  175  includes one or more EGR gasket apertures  2732  (e.g., bore, etc.), as shown in  FIG.  36   . As is explained in more detail herein, the EGR gasket apertures  2732  are each configured to receive one of the EGR adaptor fasteners  2728 . The EGR gasket  175  also includes one or more EGR gasket slots  2734  (e.g., channels, etc.). As is explained in more detail herein, the EGR gasket slots  2734  are each configured to receive one of the EGR adaptor fasteners  2728 . The EGR gasket  175  also includes at least one EGR gasket tab  2736  (e.g., tongue, etc.), as shown in  FIG.  37   . As is explained in more details here, the EGR gasket tabs  2736  assist in assembly of the intake manifold assembly  103 . 
     One of the EGR gaskets  175  is inserted between the EGR adaptor  154  and the EGR throttle  156  and one of the EGR gaskets  175  is inserted between the EGR throttle  156  and the venturi  168 , as shown in  FIG.  28   . As shown in  FIG.  38   , the EGR throttle body  158  includes a plurality of bosses  2738  (e.g., platforms, etc.). Each of the bosses  2738  interfaces with one of the EGR gasket tabs  2736 , as shown in  FIG.  39   . An interaction between the EGR gasket tab  2736  and the boss  2738  functions to retain the EGR gaskets  175  on the EGR throttle  156 . 
     As shown in  FIGS.  40  and  41   , the EGR throttle body  158  includes one or more EGR throttle apertures  2740  (e.g., bore, etc.). As is explained in more detail herein, the EGR throttle apertures  2740  are each configured to receive one of the EGR adaptor fasteners  2728 . In some embodiments, at least one of the EGR throttle apertures  2740  is threaded and is configured to threadably engage one of the EGR adaptor fasteners  2728 . The EGR throttle body  158  also includes one or more EGR throttle slots  2742  (e.g., channels, etc.). As is explained in more detail herein, the EGR throttle slots  2742  are each configured to receive one of the EGR adaptor fasteners  2728 . 
     The venturi  168  also includes one or more venturi apertures (e.g., bore, etc.). As is explained in more detail herein, the venturi apertures are each configured to receive one of the EGR adaptor fasteners  2728 . In some embodiments, at least one of the venturi apertures is threaded and is configured to threadably engage one of the EGR adaptor fasteners  2728 . 
       FIG.  42    shows the EGR adaptor  154 , two of the EGR gaskets  175 , the EGR throttle  156 , and the venturi  168  coupled together. This is accomplished by inserting at least one of the EGR adaptor fasteners  2728  through one of the EGR adaptor outlet flange apertures  2726 , one of the EGR gasket apertures  2732  of one of the EGR gaskets  175 , one of the EGR throttle apertures  2740 , one of the EGR gasket apertures  2732  of another of the EGR gaskets  175 , and one of the venturi apertures of the venturi  168 . Additionally, one of the EGR adaptor fasteners  2728  is inserted through one of the EGR adaptor outlet flange slots  2730 , one of the EGR gasket slots  2734  of one of the EGR gaskets  175 , one of the EGR throttle slots  2742 , one of the EGR gasket slots  2734  of another of the EGR gaskets  175 , and one of the venturi apertures of the venturi  168 . 
     The EGR adaptor outlet flange slots  2730 , the EGR gasket slots  2734 , and the EGR throttle slots  2742  facilitate removal of the EGR throttle  156  while the venturi  168  remains coupled to the EGR adaptor  154 . Specifically, the EGR adaptor fasteners  2728  that are inserted through the one of the EGR adaptor outlet flange apertures  2726 , one of the EGR gasket apertures  2732  of one of the EGR gaskets  175 , one of the EGR throttle apertures  2740 , one of the EGR gasket apertures  2732  of another of the EGR gaskets  175 , and one of the venturi apertures of the venturi  168  are removed (e.g., unthreaded from the venturi apertures and withdrawn through the EGR gasket apertures  2732 , the EGR throttle aperture  2740 , and the EGR adaptor outlet flange aperture  2726 , and the EGR adaptor fasteners  2728  that are inserted through one of the EGR adaptor outlet flange slots  2730 , one of the EGR gasket slots  2734  of one of the EGR gaskets  175 , one of the EGR throttle slots  2742 , one of the EGR gasket slots  2734  of another of the EGR gaskets  175 , and one of the venturi apertures of the venturi  168  are loosened. In this way, servicing or removal of the EGR throttle  156  is expedited because additional time required to realign and couple the EGR adaptor  154  and the venturi  168  is minimized. 
     III. Construction of Example Embodiments 
     While this specification contains many specific implementation details, these should not be construed as limitations on the scope of what may be claimed but rather as descriptions of features specific to particular implementations. Certain features described in this specification in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can, in some cases, be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. 
     As utilized herein, the terms “approximately,” “generally,” and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the invention as recited in the appended claims. 
     The term “coupled” and the like, as used herein, mean the joining of two components directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable or releasable). Such joining may be achieved with the two components or the two components and any additional intermediate components being integrally formed as a single unitary body with one another, with the two components, or with the two components and any additional intermediate components being attached to one another. 
     It is important to note that the construction and arrangement of the various systems shown in the various example implementations is illustrative only and not restrictive in character. All changes and modifications that come within the spirit and/or scope of the described implementations are desired to be protected. It should be understood that some features may not be necessary, and implementations lacking the various features may be contemplated as within the scope of the disclosure, the scope being defined by the claims that follow. When the language “a portion” is used, the item can include a portion and/or the entire item unless specifically stated to the contrary. 
     Also, the term “or” is used, in the context of a list of elements, in its inclusive sense (and not in its exclusive sense) so that when used to connect a list of elements, the term “or” means one, some, or all of the elements in the list. Conjunctive language such as the phrase “at least one of X, Y, and Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be either X, Y, Z, X and Y, X and Z, Y and Z, or X, Y, and Z (i.e., any combination of X, Y, and Z). Thus, such conjunctive language is not generally intended to imply that certain embodiments require at least one of X, at least one of Y, and at least one of Z to each be present, unless otherwise indicated. 
     Additionally, the use of ranges of values (e.g., W1 to W2, etc.) herein are inclusive of their maximum values and minimum values (e.g., W1 to W2 includes W1 and includes W2, etc.), unless otherwise indicated. Furthermore, a range of values (e.g., W1 to W2, etc.) does not necessarily require the inclusion of intermediate values within the range of values (e.g., W1 to W2 can include only W1 and W2, etc.), unless otherwise indicated.