Abstract:
An engine with a heat shielding enclosure system is disclosed. The heat shielding enclosure system uses serviceable, malleable gaskets to provide an improved seal to reduce the amount of heat escaping from the heat shielding enclosure and to allow for the gaskets to be serviced at low cost and difficulty.

Description:
TECHNICAL FIELD 
       [0001]    The present disclosure relates generally to sealing gaskets for heat shielding of an engine. More specifically, this disclosure relates to sealing gaskets for components interfacing with a heat shielding enclosure. 
       BACKGROUND 
       [0002]    Internal combustion engines produce hot air exhaust during normal operation as a result of the combustion process. This hot air exhaust may be directed away from cylinders through exhaust systems, including exhaust manifold assemblies of various configurations. Engine components coming in contact with exhaust gases may increase in temperature significantly, particularly when the engine is at full load. The skin temperature of engine components may pose a risk to engine operators and may reduce engine efficiency and damage components. Heat shielding may be used to guard against these risks. 
         [0003]    One approach to heat shielding is a heat shielding enclosure. A heat shielding enclosure, or “box,” is a type of heat sink that may be mounted onto an engine to directly cover components operating at a high skin temperature and to reduce the amount of heat introduced to the engine&#39;s operating environment. Heat shielding enclosures may be formed using skins of metal and thermal insulating material. A heat shielding enclosure does not require an engine to be designed with the enclosure in mind; heat shielding enclosures may be applied as a retrofit. The enclosures may be constructed to interface with engines of different sizes and with different components and different configurations of components. 
         [0004]    Heat shielding enclosures may be connected with, for example, an engine&#39;s exhaust manifold, turbochargers, and exhaust outlet elbow. Sensors, such as thermocouples, may also connect with the enclosure. For example, an engine may use thermocouples to measure the temperature of gas upstream and downstream from a turbocharger. Heat shielding enclosures have seals of rigid, non-elastomeric, non-resilient material which meet at the interfaces of these components with the heat shielding enclosure. These mating points are challenging to seal, and the structure required at the interface due to the shape of the components at that point can create challenges to forming an effective seal. Heat and vibration generated by engine operation may create or expand gaps between engine components and the heat shielding enclosure. The ability to service seals is limited and costly. 
         [0005]    Permanent seals for heat shielding enclosures cannot be individually serviced. In order to replace worn, faulty, or damaged seals, entire sections of insulation may need to be replaced, or possibly even the entire heat shielding enclosure. Furthermore, components connected with the enclosure typically require servicing. For example, turbochargers are partially inside the heat shielding enclosure, requiring the heat shielding enclosure to be accessed to service the turbochargers. Additionally, regular inspections, either required by regulations, protocol, or for performance, may require the heat shielding enclosure to be accessed. The more the heat shielding enclosure is accessed, the more wear is introduced, particularly to the permanent seals. As the seals weaken, gaps are introduced and widened between the heat shield and components, such as the exhaust outlet elbow. More interaction by operators and service personnel increases the risk of damage to seals by human error. The increased wear raises the risk of thermal leakage. 
         [0006]    In addition to being a safety hazard, heat and gas leaks are regulated and failure to meet the regulations may result in fines and other penalties. For instance, for engines in marine environments, the International Marine Organization (IMO) has a regulatory framework under the Safety of Life at Sea (SOLAS) Convention addressing engine fuel leaks and engine skin temperature. A hot engine surface coming into contact with a fuel or oil leak can result in a fire. Leaks may not necessarily be a single component failure, such as a pipe under pressure failing and spraying fuel. Gaps between engine components may allow fuel gas or blended exhaust-fuel gas to leak from the engine. Leaking gas may reduce engine efficiency, cause environmental damage, and be a healthy and safety hazard to engine operators. Radiant heat from engine components may also cause gas dispersed in the ambient air to reach flashpoint. Heat shielding enclosure seals need to be as tight as possible to help prevent leaked gas from coming into contact with high temperature engine components, such as turbocharger turbine housings. 
         [0007]    Turbochargers extract energy coming from the exhaust manifold. The intake air may be blended with fuel, such as natural gas, biogas, propane, and mixed gases, for example, before it enters the turbocharger compressor section. A throttle valve may be utilized to control the blending of fuel and intake air. Sealing the interface between the heat shielding enclosure and a turbocharger is particularly difficult due to the structure of the turbocharger. The compressor section of a turbocharger has a compressor cover, which is also known as a compressor housing. The compressor is connected by a center housing to the turbocharger turbine. The center housing contains the turbocharger cartridge containing bearings and the shaft connecting the compressor wheel and turbine wheel. The bearings and shaft require lubrication, such as oil, and coolant, such as water. Thus, coolant and oil lines are connected with the center housing, adding additional complexity to the turbocharger structure. Oil sumps may also be connected with turbochargers, adding another detail. The turbocharger turbine has its own housing, which is connected with the outlet elbow. The air that enters a turbocharger compressor during normal operation generally will have a temperature less than 50° C. (122° F.). However, the exhaust gas entering the turbocharger turbine contains significant heat. In some engines, exhaust gas entering the turbocharger turbine may reach and exceed 800° C. Exhaust gas entering the exhaust outlet elbow may reach and exceed 426.7° C. (800° F.). This can cause the turbocharger turbine, turbocharger turbine housing, and exhaust outlet elbow to reach high temperatures. Thus, a heat shielding enclosure may enclose the turbocharger turbine housing, but may leave out the turbocharger compressor housing. 
         [0008]    Some prior art methods and apparatuses using gaskets for improved seals of engine components include spiral wound gaskets disposed between the exhaust manifold and the exhaust duct. For example, U.S. Pat. No. 6,055,806, filed on May 8, 1998, and assigned to Caterpillar Inc., discloses an apparatus for providing a leak proof seal and thermal liner through the use of a spiral wound, chevron-shaped gasket disposed between the flat bottom of a counter bore of an exhaust duct and the end portions of an exhaust manifold. However, these methods and apparatuses have been somewhat disadvantageous for multiple reasons, including, but not limited to the steel construction of the gasket and the attachment by welding. 
       SUMMARY 
       [0009]    In one aspect, the disclosure describes aspects of a turbocharger gasket apparatus adapted to be compressed onto a heat shielding enclosure responsive to pressure from a turbocharger housing. In one aspect, the gasket comprises a compressible material, which, in an aspect, may be a ceramic material surrounding insulating material. The turbocharger housing may be a turbocharger central housing. The turbocharger gasket may be removable and may further comprise a clip. In one embodiment, the turbocharger gasket does not degrade in response to changes in temperature. 
         [0010]    In one aspect, the disclosure describes aspects of a heat shielding enclosure system with a removable, compressible gasket. The gasket may be an exhaust manifold conduit gasket disposed in an exhaust manifold conduit port of the heat shielding enclosure. The gasket may also be an outlet exhaust elbow gasket disposed in an outlet exhaust elbow port of the heat shielding enclosure. The gasket may also be an exhaust manifold thermocouple gasket disposed about an exhaust manifold thermocouple port of the heat shielding enclosure. The gasket may also be an outlet exhaust thermocouple gasket disposed about a thermocouple port of an outlet exhaust elbow of the heat shielding enclosure. In one embodiment, the gasket is comprised of a ceramic material surrounding insulating material. 
         [0011]    More specifically, in one aspect, the disclosure provides for the heat shielding enclosure to have serviceable gaskets comprised of a malleable ceramic fiber weave surrounding a heat shielding filler. In accordance with this aspect, the serviceable gaskets are shaped to conform to interfaces with a turbocharger, an exhaust manifold, an exhaust outlet elbow, and a thermocouple. The heat shielding enclosure is configured to enclose a portion of the turbocharger. A serviceable gasket is disposed between the turbocharger chassis and the permanent insulation of the heat shielding enclosure, a groove inlaid in the permanent insulation to capture the serviceable gasket. A serviceable gasket is disposed between the outlet elbow and the permanent insulation of the heat shielding enclosure. A serviceable gasket is disposed between a conduit from the exhaust manifold and the heat shielding enclosure. A serviceable gasket is disposed about the thermocouple wire housing. During normal operation, the serviceable gaskets form a seal from the pressure of the mating component. The seal operates to close gaps between the mating component and the permanent insulation of the heat shielding enclosure. Heat and gas inside the heat shielding enclosure are contained by the seals. 
         [0012]    In another aspect, the disclosure provides for an engine and a heat shielding enclosure adapted to interface with the engine, the heat shielding enclosure having a removable, compressible gasket. In one embodiment, the engine has a turbocharger. The heat shielding enclosure interfaces with the turbocharger, and the removable, compressible gasket is a turbocharger gasket disposed about the interface of the heat shielding enclosure and the turbocharger. In another embodiment, the engine further has an exhaust manifold conduit, and the heat shielding enclosure interfaces with the exhaust manifold conduit. In this embodiment, the removable, compressible gasket is an exhaust manifold conduit gasket disposed about the interface of the heat shielding enclosure and the exhaust manifold conduit. In another embodiment, the engine has an outlet exhaust elbow, and the heat shielding enclosure interfaces with the outlet exhaust elbow. In this embodiment, the removable, compressible gasket is an outlet exhaust elbow gasket disposed about the interface of the heat shielding enclosure and the outlet exhaust elbow. In another embodiment, the engine has an exhaust manifold thermocouple and the heat shielding enclosure interfaces with the exhaust manifold thermocouple. In this embodiment, the removable, compressible gasket is an exhaust manifold thermocouple gasket. In another embodiment, the engine further has a turbocharger outlet thermocouple and the heat shielding enclosure interfaces with the turbocharger outlet thermocouple. In this embodiment, the removable, compressible gasket is a turbocharger outlet thermocouple 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]      FIG. 1  is an exemplary illustration of an engine with a heat shielding enclosure having gaskets in accordance with one aspect of the present disclosure; 
           [0014]      FIG. 2  is an exemplary illustration of a heat shielding enclosure in accordance with one aspect of the present disclosure; 
           [0015]      FIG. 3  is an exemplary illustration of a section view of a heat shielding enclosure in accordance with one aspect of the present disclosure; 
           [0016]      FIG. 4  is an exemplary illustration of an isometric view of an outlet exhaust elbow gasket in accordance with one aspect of the present disclosure; 
           [0017]      FIG. 5  is an exemplary illustration of a top view of a heat shielding enclosure with an outlet exhaust elbow gasket in accordance with one aspect of the present disclosure; 
           [0018]      FIG. 6  is an exemplary illustration of a section view of a heat shielding enclosure with an outlet exhaust elbow gasket in accordance with one aspect of the present disclosure; 
           [0019]      FIG. 7  is an exemplary illustration of an isometric view of an exhaust manifold gasket in accordance with one aspect of the present disclosure; 
           [0020]      FIG. 8  is an exemplary illustration of a section view of an exhaust manifold gasket disposed in an exhaust manifold in accordance with one aspect of the present disclosure; 
           [0021]      FIG. 9  is an exemplary illustration of an isometric view of an exhaust manifold thermocouple gasket in accordance with one aspect of the present disclosure; 
           [0022]      FIG. 10  is an exemplary illustration of a section view of an exhaust manifold thermocouple gasket disposed in a heat shielding enclosure in accordance with one aspect of the present disclosure; 
           [0023]      FIG. 11  is an exemplary illustration of a turbocharger outlet thermocouple gasket in accordance with one aspect of the present disclosure; 
           [0024]      FIG. 12  is an exemplary illustration of a turbocharger outlet thermocouple gasket mounted in a heat shielding enclosure in accordance with one aspect of the present disclosure; 
           [0025]      FIG. 13  is an exemplary illustration of a isometric view of a turbocharger gasket in accordance with one aspect of the present disclosure; 
           [0026]      FIG. 14  is an exemplary illustration of a section view of a turbocharger gasket disposed in a heat shielding enclosure in accordance with one aspect of the present disclosure; 
       
    
    
     DETAILED DESCRIPTION 
       [0027]    Now referring to the drawings, wherein like reference numbers refer to like elements,  FIG. 1  is an exemplary illustration of engine  100  with heat shielding enclosure  104 . Engine  100  may include an ignition system, valves, pistons and corresponding cylinders, a crankshaft, a flywheel, and a fuel system. Engine  100  may further include an air inlet system, an intercooler, and an aftercooler, and may also include a water jacket, pump, reservoir, radiator, and piping. 
         [0028]    During normal engine operation, the combustion process creates exhaust gases. The exhaust passes from the cylinders of engine  100  into exhaust manifold  112 . Exhaust manifold  112  may have several pipes or conduits for directing the flow of exhaust gas. Each cylinder may have a pipe, and the individual cylinder pipes may be organized into one or more banks. The banks may connect the individual cylinder exhaust pipes into a common pipe. The pipes of exhaust manifold  112  pass into heat shielding enclosure  104 . Turbocharger  108  is connected with heat shielding enclosure  104 . As shown, turbocharger  108  and heat shielding enclosure  104  are located at the flywheel end of engine  100 . 
         [0029]    While engine  100  is shown, it should be appreciated that heat shielding enclosure  104  may be used in conjunction with many different engines. For example, heat shielding enclosures may be used with marine engines (propulsion engines, marine generator sets, auxiliary engines, etc.), gas compression engines, and in electric power generation engines. 
         [0030]    An exemplary illustration of heat shielding enclosure  104  in accordance with some aspects of the present disclosure is shown in  FIG. 2 . Heat shielding enclosure  104  is a heat sink which absorbs heat from engine components it is in contact with and that it encloses. Furthermore, it acts as a physical barrier between the hot engine components and the engine operating environment, including any operators. Heat shielding enclosure  104  has several heat shields  204 ,  208 ,  212 ,  216 ,  220 ,  224 ,  232 ,  236 ,  256 , which may be sheet metal and may be thermo-laminated. These heat shields may be connected by bolts, such as bolt  228 , or by other methods, to form heat shielding enclosure  104 . A first lateral face of heat shielding enclosure  104  faces the exhaust manifold of the engine. Mounting brackets  248 ,  252  assist in connecting heat shielding enclosure  104  with the engine. The pipes of the exhaust manifold of the engine (not shown) pass through the substantially circular port  260  and port  262 . Exhaust manifold conduit gasket  240  and exhaust manifold conduit gasket  244  are set in heat shield  232  and heat shield  236 , respectively. Exhaust manifold conduit gaskets  240 ,  244  provide a seal between the exhaust manifold pipes and heat shielding enclosure  104 . Turbocharger ports in heat shielding enclosure  104 , such as turbocharger port  284 , allow for turbochargers to be inserted. Exhaust outlet elbow port  276  is defined by heat shields, such as heat shield  208 , heat shield  204 , and heat shield  212 . Exhaust outlet elbow gasket  268  sits between the heat shielding and exhaust outlet elbow port  276 . 
         [0031]    While two ports are shown, the heat shielding enclosure  104  may be constructed to accept any number of exhaust manifold conduit configurations. Furthermore, while heat shielding enclosure  104  is shown as accepting two turbochargers, heat shielding enclosure  104  may accept a single turbocharger, more than two turbochargers, or no turbochargers. Heat shielding enclosure  104  may be constructed to accept and enclose different engine components based on the engine or the particular components desired to be shielded. Thus, heat shielding enclosure  104  may have different shapes as required by the components it is enclosing. Heat shielding enclosure  104  is not limited to any particular shape. 
         [0032]    As best shown in  FIG. 3 , a section view of heat shielding enclosure  104  in accordance with some aspects of the present disclosure is shown. Exhaust manifold conduit gasket  240  seals the interface where exhaust manifold conduit  304  connects with heat shielding enclosure  104 . Outlet exhaust elbow  324  has turbocharger exhaust port  316  and wastegate  312 . Turbocharger outlet thermocouple gasket  328  is disposed beneath outlet exhaust elbow  324 . 
         [0033]    As best shown in  FIG. 4 , an isometric view of outlet exhaust elbow gasket  268  in accordance with some aspects of the present disclosure is shown. Outlet exhaust elbow gasket  268  has arm  400  and arm  404  connected at a first end by foot  408  and at a second end by crown  272 . Arm  400  is comprised of a stepped first end  412  connected with an angled middle portion  416 . Middle portion  416  is connected with arcuate second end  420 . Arm  404  is formed similarly to arm  400  but with an orientation opposite that of arm  400 . Clips  424  may be added to exhaust outlet elbow gasket  268  segments. The connections between components of exhaust outlet elbow gasket  268  may be interference fit connections. 
         [0034]    As best shown in  FIG. 5 , a top view of a heat shielding enclosure  104  with outlet exhaust elbow gasket  268  is shown according to some aspects of the present disclosure. The rigidness of heat shielding enclosure  104  and exhaust outlet elbow  324  causes the relatively soft, pliable gasket  268  to be compressed, creating an interference fit of gasket  268  between heat shielding enclosure  104  and exhaust outlet elbow  324 . The compression causes exhaust outlet elbow gasket  268  to responsively change shape, filling the interstices between heat shielding enclosure  104  and exhaust outlet elbow  324 . This creates a tight, effective seal between heat shielding enclosure  104  and exhaust outlet elbow  324 . Exhaust outlet elbow flange  516 , which may be connected with an exhaust stack (not shown), has clearance above the interface between the outer casing of exhaust outlet elbow  324  and exhaust outlet elbow gasket  268 . In one embodiment, grooves (not shown) may be set in heat shields  208 ,  212 ,  204 ,  508 ,  512  to accept exhaust outlet elbow gasket  268 . 
         [0035]    Outlet exhaust elbow gasket  268  is sized and elastomeric to the extent that pressure exerted by heat shields of heat shielding enclosure  104  and exhaust outlet elbow  324  on gasket  268  cause a tight seal to be formed. Direct lateral pressure from heat shield  208  and the outer casing of exhaust outlet elbow  324  holds arm  400  in place and prevents heat from escaping. Direct lateral pressure from heat shield  508  and heat shield  204  perpendicular to that of the lateral pressure also keep arm  268  in position and tightens the seal. Similarly, gasket arm  404  is held by the lateral pressure of the outer casing of exhaust outlet elbow  324  and heat shields  212  and  216 . Perpendicular pressure from heat shields  512  and  204  perpendicular to that of the lateral pressure also keep arm  404  in position and tighten the seal. Direct pressure from the casing of wastegate  312  of outlet exhaust elbow  324  and heat shield  204  compresses gasket foot  408 , forming a tight seal. Gasket crown  272  (not shown—shown in  FIG. 4 ) is similarly compressed by heat shields  508  and  512  and the casing of exhaust outlet elbow  324 . 
         [0036]    As best seen in  FIG. 6 , a section view of an outlet exhaust elbow  324  with gasket  268  is shown according to some aspects of the present disclosure. Outlet elbow exhaust elbow crown gasket  272  of outlet elbow exhaust gasket  268  is disposed below bracket assembly  604  of outlet exhaust elbow  324 . Gasket  272  is compressed between the casing of outlet exhaust elbow  324  and the rear heat shielding  608  of heat shielding enclosure  104 . The insulation  612  of rear heat shielding  608  is shown between skin  616  and  620 . 
         [0037]    As best seen in  FIG. 7 , an isometric view of exhaust manifold conduit gasket  240  is shown according to some aspects of the disclosure. Exhaust manifold conduit gasket  240  has an annular ring shape, forming port  260 . Exhaust manifold conduit gasket  240  may be formed from an elongate section of gasket material and shaped into gasket ring  704 , with two mating faces forming seam  708 . The length of the gasket material, and the corresponding diameter of port  260 , may vary depending on the size of the exhaust manifold gasket pipe and the size of the opening in the corresponding heat shielding enclosure. In one embodiment, the gasket material is an insulating material encased in a ceramic weave. 
         [0038]    As best seen in  FIG. 8 , a section view of exhaust manifold conduit gasket  240  disposed about an exhaust manifold is shown according to some aspects of the disclosure. Exhaust manifold conduit gasket  240  may be disposed around exhaust manifold conduit  304  forming a radial seal between exhaust manifold conduit and its mating interface with heat shielding enclosure  104 . Exhaust manifold conduit gasket  240  has a first diameter  804  and a second diameter  808 , creating a step-down. This step-down accommodates a portion of the exhaust manifold  812  that extends into the heat shielding enclosure  104 . Exhaust manifold extension  812  may have thermocouple port  816  to accept a thermocouple for measuring the temperature of exhaust air entering the heat shielding enclosure  104 . Thermocouple port  816  may be substantially cylindrical. 
         [0039]    As best seen in  FIG. 9 , an isometric view of exhaust manifold thermocouple gasket  900  is shown in accordance with one aspect of the present disclosure. Exhaust manifold gasket  900  has gasket body  904  of two elongate gasket legs  908 ,  912  connected by gasket bridge  916 . Elongate gasket legs  908  and  912  may have curved ends. Elongate gasket legs  908  and  912  are in substantial contact along their length, the faces of elongate gasket legs  908  and  912  pressing together to form thermocouple seam  920 . A thermocouple wire (not shown), or other kind of wire, may pass through thermocouple seam  920 . Thermocouple seam  920  allows the wire to be passed through and forms a seal around the wire, preventing heat from passing through. Exhaust manifold thermocouple gasket  900  may have sleeves  924 ,  928 . Sleeves  924 ,  928  may have a C channel shape. The outer edges of legs  908  and  912  may be situated in these channels, the pressure from sleeves  924  and  928  keeping gasket body  904  in position. Sleeves  924  and  928  remain rigid while gasket body  904  may be “soft.” Sleeves  924  and  928  may have connection points, such as opening  932 . The soft characteristic of gasket body  904  allows the thermocouple wire to be passed through while pressure is maintained between elongate gasket legs  908 ,  912 . A radial seal is formed by gasket body  904  around the thermocouple wire as it passes through exhaust manifold thermocouple gasket  900 . 
         [0040]    As best seen in  FIG. 10 , a section view of exhaust manifold thermocouple gasket  900  disposed in heat shielding enclosure  104  is shown in accordance with one aspect of the present disclosure. A thermocouple may be used to measure the temperature of exhaust gas in the exhaust manifold. When a turbocharger is attached, an exhaust manifold thermocouple allows for the exhaust gas temperature to be monitored as it flows into the turbocharger turbine. Heat may be prevented from escaping the enclosure and from melting or otherwise damaging the thermocouple wire by exhaust manifold thermocouple gasket  900 . The thermocouple enters heat shielding enclosure at exhaust manifold thermocouple interface  266  (shown in  FIG. 2 ). Exhaust manifold thermocouple gasket  900  is disposed inside of heat shielding enclosure  104  opposite exhaust manifold thermocouple interface  266 , abutting exterior-facing insulating material and heat shield  216 , above heat shield  1004 , and below heat shield  204 . While a single thermocouple and exhaust manifold extension  812  is shown, multiple thermocouples may be used with a single exhaust manifold extension or with multiple extensions, which may carry exhaust to other components, such as wastegate  312  (as shown in  FIG. 3  and  FIG. 5 ). 
         [0041]    As best seen in  FIG. 11 , an isometric view of turbocharger outlet thermocouple gasket  328  is shown in accordance with one aspect of the present disclosure. Turbocharger outlet thermocouple gasket  328  may have gasket bodies  1108 ,  1112  compressed together forming seam  1116 . A thermocouple may be passed between the mating faces of compressed gasket bodies at seam  1116 . Housings  1120 ,  1124  may be placed laterally adjacent to gasket bodies  1108 ,  1112  on the outer edges opposite the edges forming seam  1116 . Housings  1120  may be secured to gasket bodies  1108 ,  1112  by bolts, screws, and the like, such as bolt  1128 . Additionally, turbocharger outlet thermocouple gasket  328  may be connected with bracket  1132  to mount the gasket in the appropriate position inside heat shielding enclosure  104 . Bracket  1132  has base  1134 , which may have attachment points  1135 . Base  1134  may be connected with stand  1138  at stand&#39;s  1138  first end. Stand  1138  is perpendicular to base  1134 , prongs  1136 ,  1140  extend from the second end of stand  1138 . 
         [0042]    As best seen in  FIG. 12 , turbocharger outlet thermocouple gasket  328  in heat shielding enclosure  104  is shown in accordance with one aspect of the present disclosure. Turbocharger outlet thermocouple gasket  328  is disposed below outlet exhaust elbow  324 . A thermocouple may extend into outlet exhaust elbow gasket  324  via thermocouple port  1204  to measure the temperature of air exiting a turbocharger. Multiple turbocharger outlet thermocouple gaskets  328  may be used in conjunction with multiple thermocouples. Multiple thermocouples may be used to measure the temperature of air exiting one or more turbochargers  108 . Furthermore, while  FIG. 12  shows turbocharger outlet thermocouple gasket  328  disposed below outlet exhaust elbow gasket  324 , thermocouple gasket  328  may be placed in different locations, with thermocouple port  1204  aligned. 
         [0043]    As best seen in  FIG. 13 , an isometric view of turbocharger gasket  280  is shown in accordance with one aspect of the present disclosure. Turbocharger gasket  280  defines an approximately rectangular turbocharger central housing opening  284 . While the approximately rectangular form of turbocharger central housing opening  284  may have dimensions approximately or exactly uniform length, the outer edge of turbocharger gasket  280  is not uniform. First rectangular section  1304  and second rectangular section  1308  meet to define an approximate right angle. Rectangular section  1304  extends into arcuate section  1312 . Rectangular section  1308  extends into arcuate section  1324 . Arcuate section  1312  extends into terminating section  1316 . Arcuate section  1324  and terminating section  1316  have mating faces which form seam  1320 . 
         [0044]    As best seen in  FIG. 14 , a section view of turbocharger gasket  280  in heat shielding enclosure  104  is shown in accordance with one aspect of the present disclosure. Central housing  1404  of turbocharger  108  mates with and passes through port  284  (as shown in  FIG. 2 ), connecting with turbocharger turbine housing  1412 . Turbocharger turbine housing  1412  is displaced inside heat shielding enclosure  104  and is in flow connection with exhaust outlet elbow  324 . As central housing  1404  passes through port  284 , it compresses turbocharger gasket  280  against heat shielding enclosure  104 . Central housing  1404  has step down  1416 ,  1420  where the width of central housing  1404  decreases. First step-down face  1424  and second step-down face  1428  provide the direct pressure against turbocharger gasket  280  against the exterior of heat shielding enclosure  104 , such as against heat shield  216 . The compression of turbocharger gasket  280  causes it to seal port  284  as it expands between turbocharger central housing  1404  and heat shielding enclosure  104 . Turbocharger  108  interfaces with heat shielding enclosure  104 . Clips  1408  may be present along the outer edge of turbocharger gasket  280 . Clips  1408  may help prevent gasket  280  from moving out of position. 
         [0045]    Gaskets  268 ,  240 ,  244 ,  280 ,  328 ,  900  may be comprised of a high temperature-rated ceramic material surrounding insulating material. The ceramic material may be a weave encasing the insulating material. The gaskets may be constructed by sewing or stitching ceramic fabric pieces around a filler material. The relative softness of this material allows the gaskets to alter shape in response to pressure from rigid components, filling interstices and creating tight seals. Heat is not required to make the gaskets seal and the compliancy of the gaskets will not change at high temperature and will not degrade due to changes in temperature. Seals will be maintained from the first installation at room temperature up through operating temperature. 
         [0046]    A visual inspection allows an operator to determine if a gasket is effectively sealing, and a defective or worn gasket may be serviced. Service may also be performed for required maintenance, in response to damage, or to comply with regulations, for example. Servicing gaskets  268 ,  240 ,  244 ,  280 ,  328 ,  900  may include, for example, repairing, resituating, or replacing a gasket. Gaskets  268 ,  240 ,  244 ,  280 ,  328 ,  900  may be serviced without removing or modifying any structures or components of the box, such as heat shields. However, permanent insulation or metal skins may be removed from heat shielding enclosure  104  in order to service gaskets  268 ,  240 ,  244 ,  280 ,  328 ,  900 . For example, to service turbocharger gasket  280 , heat shields  216  and  220  may be removed. Heat shields  204 ,  208 , and  212  may be removed to service outlet exhaust elbow gasket  268 . Heat shield  232  may be removed to service exhaust manifold conduit gasket  240 . Heat shield  236  may be removed to service exhaust manifold conduit gasket  244 . Heat shield  216  may be removed to service exhaust manifold thermocouple gasket  900 . Heat shield  224  may be removed to service turbocharger outlet thermocouple gasket  328 . However, it should be appreciated that these heat shields are for a particularly disclosed embodiment. Heat shielding enclosures may have different configurations and other arrangements of heat shields, skins, and insulation, that require different components to be removed in order to replace gaskets. 
         [0047]    When a component is serviced, a gasket may be serviced as well. For example, when a component, such as turbocharger  108 , is serviced, enclosure  104  may be removed along with turbocharger gasket  280 . Turbocharger gasket  280  may be replaced with a new gasket, or may be resituated when service is finished. Thus, service may be performed on a gasket opportunistically when service is being performed on engine components heat shielding enclosure  104  interfaces with, or because of a desire to service gasket  268 ,  240 ,  244 ,  280 ,  328 ,  900 . 
       INDUSTRIAL APPLICABILITY 
       [0048]    The present disclosure is applicable to heat shielding enclosures. Gaskets for heat shielding enclosures are an important part engine heat regulation systems. The use of gaskets may improve seals for openings in a heat shielding enclosure, such as the openings for exhaust manifolds, turbochargers, exhaust outlet elbows, and thermocouples. Seal improvements allow for improved control over engine radiant heat. Regulation of heat requires keeping temperatures significantly below the flashpoint of gases such as natural gas, butane, and methane, as well as oil. Additionally, by controlling engine radiant more effectively, secondary cooling systems, such as engine room ventilation systems, may be put under less pressure. Other systems, such as generators and switchgear, may be better protected by a better controlled ambient temperature in engine room environments. 
         [0049]    Serviceable seals are also more economical. Serviceable seals allow for quicker, less expensive servicing of heat shielding enclosures. This desirable feature allows gaskets to be replaced without replacing an entire heat shielding enclosure or heat shielding skins and permanent insulation. Additionally, serviceable seals are advantageous over permanent seals because permanent seals do not provide as effective of a seal. 
         [0050]    The many features and advantages of the disclosure are apparent from the detailed specification, and, thus, it is intended by the appended claims to cover all such features and advantages of the disclosure which fall within its true spirit and scope. Further, since numerous modifications and variations will readily occur to those skilled in the art, it is not desired to limit the disclosure to the exact construction and operation illustrated and described, and, accordingly, all suitable modifications and equivalents may be resorted to that fall within the scope of the disclosure.