Patent Publication Number: US-10760457-B2

Title: Fast engine oil warm-up type oil pan and engine system thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2017-0168055, filed on Dec. 8, 2017, the entire contents of which are incorporated herein by reference. 
     FIELD 
     The present disclosure relates to an oil pan, and more particularly, an engine system applied with the oil pan for fast engine oil warm-up. 
     BACKGROUND 
     The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. 
     In general, an internal combustion engine of a vehicle generates the reciprocal motion of a piston and the rotation motion of a crankshaft, so that the lubrication for the sliding surface of the moving system is required, and for this purpose, oil circulating in the engine should be provided. An oil pan is provided to store the oil. 
     In one form, the oil pan consists of an oil chamber which forms the inner space where the oil flowing at a certain flow rate according to the engine specification is stored, an oil pump pumping the internal oil, and a heater to heat the oil. 
     Therefore, the oil pan forms an oil circulation in which the oil is returned after lubricating the friction sliding surface of the engine by the operation of the oil pump, and particularly, in cold start condition of the engine, the heater raises the oil temperature to a certain level. 
     However, heating the entire oil in the oil chamber delays the engine oil warm-up time to reach a the desired level. 
     This is disadvantageous to the friction fuel efficiency of the engine in the cold start condition and CO2 emission reduction, and also causes difficulties in meeting the regulation reinforcement of the worldwide harmonized light vehicles test procedure (WLTP) in the environmental market and fuel efficiency/EM (emission) by the real driving emission (RDE). 
     We have discovered that in order to improve the engine friction efficiency during cold starting and starting operation of the engine, it is desired to accelerate the preheating of the engine oil, and improvement of the performance of the oil pan. 
     The foregoing is intended merely to aid in the understanding of the background of the present disclosure, and is not intended to mean that the present disclosure falls within the purview of the related art that is already known to those skilled in the art. 
     SUMMARY 
     In view of the above matters, the present disclosure provides a fast engine oil warm-up type oil pan and an engine system thereof capable of preheating acceleration to improve engine oil warm-up efficiency under cold start operation by quickly supplying the engine oil in one compartment when engine oil is below a certain temperature, and particularly, increasing design freedom by separating the preheating accelerated oil flow using the compartment space by a dual chamber. 
     An oil pan, in one form of the present disclosure, may include: a pan body configured to form a primary chamber and a secondary chamber which are configured to contain a different amount of oil, respectively; and a mesh configured to differentiate an amount of oil permeation discharged from the secondary chamber to the primary chamber based on temperature of the oil. 
     As an one exemplary form, the pan body may be made of plastic. The oil temperature at which the amount of oil permeation is low may be a cold starting condition of an engine to which the oil is supplied. A capacity of the secondary chamber may be in a range from 30% to 40% compared to a capacity of the primary chamber. The mesh may be made of steel mesh and configured to adjust the amount of oil permeation by a mesh density of micrometer (μm) to be provided on a bottom surface of the secondary chamber. 
     As an another exemplary form, the pan body may include: a main chamber case forming the primary chamber and a sub-chamber case forming the secondary chamber; and the sub-chamber case is coupled to the main chamber case. The main chamber case is coupled with the sub-chamber case by fusing the sub-chamber case to sub-chamber ribs formed at the main chamber case. 
     In one form, a plurality of oil drop holes spaced apart from each other and an oil exchange hole are formed on the sub-chamber case and arranged at right angles to each other. In addition, a safety hole may be opened toward the same direction as the oil exchange hole is opened, and the safety hole and oil exchange hole are spaced apart from each other. The mesh may be coupled to each of the oil drop hole and the oil exchange hole. 
     As an one exemplary form, an oil pump for pumping the oil is provided at the pan body. 
     In other form, a pan cover may be coupled to the pan body to block external exposure of the primary chamber and the secondary chamber. 
     In another exemplary form, a heater, which makes the oil of the secondary chamber to be flowed into an inner space thereof at oil temperature of the low permeation amount and heats the oil flowed into the inner space, may be further include. The heater may be provided in the secondary chamber to form the inner space in which the oil of the secondary chamber is gathered, and may heat the oil through a heating element provided in the inner space thereof. A sub-chamber valve may be provided at the pan body, and the inner spaces of the secondary chamber and the heater may be communicated or blocked by the operation of the sub-chamber valve. The oil pump may be positioned at the heater side to pump the oil. 
     An engine system of the present disclosure may include an oil pan configured to store oil, and the oil pan includes: a pan body forming a dual chamber having a primary chamber formed by a main chamber case and a secondary chamber formed by a sub-chamber case; a mesh provided at an oil drop hole of the sub-chamber case to differ an amount of the permeation discharged from the primary chamber to the secondary chamber based on temperature of the oil; and an oil pump pumping the oil to circulate the oil in an engine. 
     As an one exemplary form, the oil pan may be made of plastic and located at a lower portion of the engine. 
     As an another exemplary form, the engine system may further include a heater installed in the oil pan to heat the flowed into oil from the primary chamber to convert the tempered oil at low oil temperature of the low oil permeation amount, and an ECU for operating the heater such that the fast engine oil warm-up is performed to the tempered oil under the cold starting condition of the engine. 
     The engine system of the present disclosure to which the fast engine oil warm-up type oil pan is applied, realizes the following actions and effects through the fast engine oil warm-up in cold and initial starting operation. 
     Firstly, as the engine oil warm-up time gets faster, the friction improvement effect on the moving system of the engine becomes higher. 
     Secondly, the preheating acceleration of the engine oil further improves the effect of improving the friction fuel efficiency by decreasing the heat loss and increasing the warming effect. 
     Thirdly, improvement in friction fuel efficiency reduces NOx and CO2 exhaust during the cold starting and initial starting of the engine, thereby meeting WLTP and RDE fuel efficiency/EM regulations and responding the increased environmental consciousness. 
     Fourthly, due to the divided space of a dual chamber, preheating acceleration oil flow rate is divided, so that it is possible to vary preheating acceleration oil flow rate of the oil pan according to engine specification, thereby realizing high degree of freedom of design. 
     Fifthly, the oil pan is made of plastic, so it is easy to realize insulation effect and complex shape compared to steel or aluminum. 
     Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. 
    
    
     
       DRAWINGS 
       In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which: 
         FIG. 1  is a schematic diagram of a main chamber body and a sub-chamber body which constitute a chamber body of a fast engine oil warm-up type oil pan in one form of the present disclosure; 
         FIGS. 2A-2B  show an example of the oil permeability design of a sub-chamber body by a mesh in one form of the present disclosure; 
         FIG. 3  shows the oil flow state in the oil pan for preheating accelerating of low temperature engine oil in cold starting of an engine in one form of the present disclosure; 
         FIG. 4  shows the oil flow state of the high temperature engine oil in the oil pan in one form of the present disclosure; 
         FIG. 5  shows the inter-chamber oil exchange state of the oil pan through a safety hole when the mesh is blocked in one form of the present disclosure; 
         FIGS. 6A and 6B  are schematic diagrams of an engine system to which a fast engine oil warm-up type oil pan is applied in one form of the present disclosure; 
         FIG. 7  is a perspective view of the chamber body from which the cover of the fast engine oil warm-up type oil pan in one form of the present disclosure is removed. 
         FIGS. 8A-8B  show the oil flow state in the oil pan for preheating accelerating of the low temperature engine oil in cold starting of the engine in one form of the present disclosure; and 
         FIGS. 9A-9B  show the oil flow state of the high temperature engine oil in the oil pan in one form of the present disclosure. 
     
    
    
     The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. 
     DETAILED DESCRIPTION 
     The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. 
     These forms are to be considered as illustrative and not restrictive, as those skilled in the art will readily appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the present disclosure as disclosed in the accompanying claims. 
     Referring to  FIGS. 1 and 6A , an oil pan  1  may be made of plastic injection molding to be arranged below an engine  100 . The oil pan  1  may be configured to a fast engine oil warm-up type oil pan  1  capable of rapidly warming-up engine oil by preheating acceleration for the engine  100  (a low temperature engine oil (for, example, room temperature compared to 60° C.˜100° C.) in cold starting of the engine. 
     For this purpose, the oil pan  1  may include a pan body  2 , a pan cover  3  and an oil pump  60 . 
     For example, the pan body  2  and the pan cover  3  may be formed of a case shape. The pan body  2  may form a dual chamber having a main chamber case  10  and a sub-chamber case  20  in which oil is stored, respectively. In cold starting condition, only the oil of the sub-chamber case  20  is rapidly supplied to the engine  100  so that it is able to rapidly increase temperature of the oil. The pan cover  3  may be fastened to the main chamber case  10  by bolting to be integrated with the oil pan  1 , and block the inner space of the dual chamber from the outside. 
     For example, the oil pump  60  may be arranged at one side of the sub-chamber case  20 , and pumps the oil collected in an inner space thereof to form the oil circulation flow which is supplied to the engine  100 . 
     In one form, the main chamber case  10  may be sized to accommodate the sub-chamber case  20  in an inner space of the main chamber case  10 , and the pan cover  3  may be engaged to an outer main chamber rim  11 - 1  by bolting. Therefore, in the main chamber case  10 , a part of the inner space thereof forms a primary chamber occupied by a sub-chamber case  20 , and the sub-chamber case  20  forms a secondary chamber with its own shape. Particularly, the secondary chamber capacity of the sub-chamber case  20  may be designed to secure durability, function, and the oil supply safety during a vehicle is turning as well as fuel efficiency while focusing on the fast engine oil warm-up in cold starting. For example, the secondary chamber capacity of the sub-chamber case  20  may be set to 30-40% of the secondary chamber capacity of the main chamber case  10 . 
     The main chamber case  10  may be composed of a main chamber body  11  forming the primary chamber, the main chamber rim  11 - 1  forming the outer rim of the main chamber body  11 , a drain port  12  drilled to the bottom surface of the main chamber body  11 , a sensor mounting boss  13  formed to protrude from the bottom surface of the main chamber body  11 , a sub-chamber post  14  formed to protrude from the bottom surface of the main chamber body  11  along the wall surface of the primary chamber, and a sub-chamber rib  19  formed at the sub-chamber post  14 . 
     For example, the main chamber body  11  may form the primary chamber by the inner space having the bottom surface, and the capacity of the primary chamber may be set to 60-70% of the secondary chamber of the sub-chamber case  20 . The primary chamber may be composed of a main chamber  10 - 1  and a main extension chamber  10 - 2  bounding the total length of the main chamber body  11 , and the main chamber  10 - 1  may be positioned at the space where the drain port  12  and the sensor mounting boss  13  are arranged. The main extension chamber  10 - 2  may be connected to the side surface of the main chamber  10 - 1  to form a protrusion engaged with the sub-chamber case  20 . Particularly, the bottom surface of the main chamber  10 - 1  may be flat and the bottom surface of the main extension chamber  10 - 2  may be formed to be slant in order to guide the oil flow toward the main chamber  10 - 1 . 
     For example, the main chamber rim  11 - 1  may be integrally formed at the rim of the main chamber body  11  in the flange shape in which a plurality of holes are drilled for the bolting engagement. The drain port  12  drains the oil to the outside of the main chamber body  11 . The sensor mounting boss  13  may form a place to which an oil level sensor  70  is fastened as shown in  FIG. 7 . 
     For example, when the total length of the main chamber body  11  is divided into the forward and backward directions and the total width thereof is divided into the left and right sides, the sub-chamber post  14  may be composed of front and rear ports  14 - 1  and  14 - 2  formed in front and rear along the total length, respectively, and left and right ports  14 - 3  and  14 - 4  formed on the left and right sides along the total width, respectively. The front post  14 - 1  may be formed on the wall surface of the main extension chamber  10 - 2  at a level lower than the rim of the main chamber body  11  and the rear post  14 - 2  may be formed on the wall surface of the main chamber  10 - 1  at a height lower than the rim of the main chamber body  11 . The left post  14 - 3  may be formed on the wall surface of the main chamber  10 - 1  at a lower level than the rim of the main chamber body  11  and the right post  14 - 4  may be formed on the wall surface of the chamber  10 - 1  at a height lower than the rim of the main chamber body  11 . 
     For example, the sub-chamber rib  19  may have a protrude shape so that a sub-chamber body  21  of the sub-chamber case  20  can be seated to be fused, and the sub-chamber rib  19  may be divided into front and rear ribs  19 - 1  and  19 - 2  and left and right ribs  19 - 3  and  19 - 4  and bottom ribs  9 - 5 . The front and rear ribs  19 - 1  and  19 - 2  may be formed at the front and rear ports  14 - 1  and  14 - 2 , respectively, and the left and right ribs  19 - 3  and  19 - 4  may be formed at the left and right ports  14 - 3  and  14 - 4 , and the plurality of the bottom ribs  19 - 5  may be formed on the bottom surface of the main chamber body  11  in the space of the main chamber  10 - 1 . 
     Concretely, the sub-chamber case  20  may composed of a sub-chamber body  21  forming the secondary chamber, a sub-chamber rim  21 - 1  forming an outer rim of the sub-chamber body  21 , an oil drop hole  25  exhausting the oil of the secondary chamber from the sub-chamber body  21 , a sensor hole  26  into which an oil level sensor  70  is inserted, an oil exchange hole  27  moving the oils of the primary and secondary chambers to each other, a safety hole  28  moving the oil of the primary and secondary chambers to each other when the oil exchange hole  27  is blocked, and a mesh  29  provided at the oil drop hole  25  and the oil exchange hole  27  to adjust the temperature of the oil exhausted to the oil drop hole  25  and the oil exchange hole  27 . 
     For example, the sub-chamber body  21  may form the secondary chamber by the inner space having an bottom surface, and the capacity of the secondary chamber may be set to 30-40% compared to the capacity of the primary chamber of main chamber case  10 . Particularly, the bottom surface of the sub-chamber body  21  may be fused to the bottom ribs  19 - 5 . Further, the secondary chamber may be composed of a sub-chamber  20 - 1  and a sub-extension chamber  20 - 2  dividing the total length of the sub-chamber body  21 , the sub-extension chamber  20 - 2  may be divided as a part of an inner space in which a protrude engaged with the main chamber case  10  is formed whereas the sub-chamber  20 - 1  is partitioned into an inner space excluding the sub-extension chamber  20 - 2  and forms an acute angle sub-chamber inclination coincident with the inclination angle of the main extension chamber  10 - 2  toward the sub-chamber  20 - 1 . 
     Particularly, the sub-chamber  20 - 1  may be divided into a pump chamber  20 - 1 A, a sensor chamber  20 - 1 B and a mesh chamber  20 - 1 C. The pump chamber  20 - 1 A may be formed at a depth that fully accommodates the size of the oil pump  60 , and each of the sensor chamber  20 - 1 B and the mesh chamber  20 - 1 C may be protruded lower than the outer rim of the sub-chamber body  21  on the bottom surface of the pump chamber  20 - 1 A to be connected with the sub-extension chamber  20 - 2 . In this case, the bottom surfaces of the pump chamber  20 - 1 A and the mesh chamber  20 - 1 C are flat while the mesh chamber  20 - 1 C forms an acute angle pump chamber inclination that induces an oil flow toward the pump chamber  20 - 1 A. Further, the sensor hole  26  may be pierced on the upper surface of the sensor chamber  20 - 1 B while the oil exchange hole  27  communicated with the pump chamber  20 - 1 A may be pierced on the side surface of the sensor chamber  20 - 1 B, and the oil drop hole  25  may be pierced on the upper surface of the mesh chamber  20 - 1 C while the safety hole  28  communicated with the pump chamber  20 - 1 A may be pierced on the side surface of the mesh chamber  20 - 1 C. 
     For example, the sub-chamber rim  21 - 1  may be integrally formed on the rim of the sub-chamber body  21  with a flange shape and fused with each of the front, rear, left and right ribs  19 - 1 ,  19 - 2 ,  19 - 3  and  19 - 4 . 
     For example, the oil drop hole  25  may be composed of a first, second and third holes  25 A,  25 B and  25 C separated from each other, and the first hole  25 A may be pierced on the upper surface of the sub-extension chamber  20 - 2  and each of the second and third holes  25 B and  25 C may be pierced on the upper surface of the mesh chamber  20 - 1 C. The sensor hole  26  may be pierced on the upper surface of the sensor chamber  20 - 1 B. The oil exchange hole  27  may be pierced on the side surface on the sensor chamber  20 - 1 B. The safety hole  28  may be pierced on the surface of mesh chamber  20 - 1 C so that the oil flow passage of the primary and secondary chambers can be maintained regardless of the oil temperature when the oil exchange hole  27  is blocked. Therefore, the oil drop hole  25  and the safety hole  28  are formed at right angles to each other, and the sensor hole  26  and the oil exchange hole  27  are formed at right angles to each other. Thus, the oil exchange hole  27  is opened toward the same direction as the safety hole is opened, and the safety hole  28  and oil exchange hole  27  are spaced apart from each other. 
     For example, the mesh  29  may be coupled to each of the first, second and third holes  25 A,  25 B and  25 C, and serve to discharge the oil of the secondary chamber from the sub-chamber case  20  toward the primary chamber of the main chamber case  10  depending on the oil temperature. Further, the mesh  29  may be coupled to the oil exchange hole  27 , and serve to move the oil from the primary chamber to the secondary chamber or from the secondary chamber to the primary chamber depending on the oil temperature. 
     Particularly, the mesh  29  may be made of steel mesh so that the oil permeation amount of the mesh  29  is set to the steel mesh size. For example, the steel mesh size may set the oil temperature of 60-100° C. as a threshold value considering durability and function for oil supply stability. 
     Referring to  FIGS. 2A-2B , when the oil flow of 1000 ml and the mesh  29  of 150 μm are applied, the ratio of the drain flow rate (A) and non-drain flow rate (a) at the room temperature is about 1.5 times, the ratio of the drain flow rate (B) and non-drain flow rate (b) at 60° C. is about 3.0 times, the ratio of the drain flow rate (D) and non-drain flow rate (d) at 80° C. is about 4.0 times and the ratio of the drain flow rate (E) and non-drain flow rate (e) at 100° C. is increased to about 24 times. 
     Particularly, since the oil permeation amount of the mesh  29  may be changed by a mesh density of micrometer (μm) in the same oil condition, the steel mesh size of the mesh  29  may be determined in response to the oil permeation flow rate (for example, drain flow rate) for discharge and movement between primary and secondary chambers and the viscosity of the engine oil. 
     Meanwhile,  FIGS. 3 and 4  show oil flow by oil temperature using the primary and secondary chambers of the oil pan  1 . 
       FIG. 3  shows the oil flow state in the oil pan  1  for fast engine oil warm-up in the cold starting condition of the engine. As shown in  FIG. 3 , in case of the oil temperature of room temperature in cold starting condition of the engine, the room temperature oil (cold oil) is not supplied to the primary chamber of the main chamber case  10  due to the operation of the mesh  29  coupled to the first, second and third holes  25 A,  25 B and  25 C of the sub-chamber case  20  and the oil exchange hole  27 , respectively, to stay in the secondary chamber of the sub-chamber case  20 . 
     Therefore, when the oil pump  60  is operated during the operation of the engine by the cold starting condition, the room temperature oil (cold oil) is exhausted to the secondary chamber of the sub-chamber case  20 . Then, the room temperature oil (cold oil) discharged to the secondary chamber passes through the sub-extension chamber  20 - 2 , the sensor chamber  20 - 1 B and the mesh chamber  20 - 1 C to be gathered in the pump chamber  20 - 1 A, and the room temperature oil (cold oil) gathered in the pump chamber  20 - 1 A is discharged to the inner space thereof. As a result, the room temperature oil (cold oil) sufficiently gathered in the inner space is sent to the engine through the oil pump  60  pumping action. 
     Thereafter, the returned oil of the engine is converted to the tempered oil of which temperature is raised by heat exchange and then flows into again, and the tempered oil circulates again through the same process as the room temperature oil (cold oil). Then, after the tempered oil has risen to a certain temperature (e.g. 80° C.) by repeating the circulation process, the oil flow of oil pan  1  is switched to the oil flow state shown in  FIG. 4 . 
     Referring to  FIG. 4 , the tempered oil, which has been raised to a sufficient temperature, is passed through the first, second and third holes  25 A,  25 B and  25 C of the sub-chamber case  20  and flows into the primary chamber of the main chamber case  10 , and then, moves from the primary chamber to the secondary chamber through the oil exchange hole  27  of the sub-chamber case  20 , respectively. 
     As a result, the pumping operation of the oil pump  60  sucks all of the tempered oil in the primary and secondary chambers so that the oil flow rate is supplied at a sufficient oil flow rate desired by the engine after the cold starting of the engine. 
     On the other hand,  FIG. 5  shows the oil exchange state between the primary and secondary chambers of the oil through the safety hole  28  when the mesh  29  is blocked. As shown in  FIG. 5 , blockage of the mesh  29  blocks the oil flow through the first, second and third holes  25 A,  25 B and  25 C and the oil exchange hole  27 , so that oil movement is formed regardless of the oil temperature with respect to the oil movement failure of the primary and secondary chambers through the oil change hole  27 . 
     As a result, the oil pan  1  can reliably supply and circulate the engine oil to the engine. 
     On the other hand,  FIGS. 6 to 9  show an example of engine system to which a fast engine oil warm-up type oil pan  1  is applied. 
     Referring to  FIGS. 6A-6B and 7 , the engine system may be composed of the oil pan  1 , the engine  100  and an ECU  200 . Particularly, the oil pan  1  may include a heater  30 , an oil deflector  40  formed of a case shape, a flow rate valve  50 , an oil level sensor  70  and an oil strainer (not shown). The reason for this is to avoid fuel efficiency deterioration and excessive exhaust gas generation, and so on, due to the cold starting of the engine, by realizing a fast temperature rise by adding function of the fast engine oil warm-up type oil pan  1  shown in  FIG. 1  to  FIG. 5  and oil heating function of the heater  30 . 
     The engine  100  may be an internal combustion engine and in operation thereof, the oil of oil pan  1  is circulated so that the friction sliding surface of the moving system can be lubricated. The ECU  200  detects an engine oil temperature, engine ON/OFF and engine coolant temperature, and so on, and controls the engine  100  with an engine control signal and controls each operations of the engine  100 , a heating element  35 , an oil deflector valve  50 - 1 , a sub-chamber valve  50 - 2  and the oil pump  60  with an oil pan control signal according to the operation of the engine  100 . In this case, the oil pan control signal is a heater ON/OFF signal, a valve open/close signal, and an oil pump ON/OFF signal. 
     For example, the heater  30  heats the oil of the sub-chamber case  20  in the cold starting condition to promote oil warm-up by rapid oil temperature rise. For this, the heater  30  is located in the sub-chamber case  20  and forms the space in which the oil stored in the sub-chamber case  20  and the oil of the sub-chamber case  20  flowed into from the main chamber case  10  are gathered. To this end, the heater  30  may be composed of a heater body  31  forming an inner space and a heating body  35  built in the heater body  31  to generate heat. The heater body  31  may be integrated with the sub-chamber case  20  in an injection molded structure, or integrated with the sub-chamber case  20  through a screw or welding as a separate structure. The heating element  35  may be made of a heating conductor 
     For example, the oil deflector  40  may be located in the inner space of the sub-chamber case  20  and exhaust the stored oil through the hollow boss located in the inner space of the heater  30 . 
     For example, the flow rate valve  50  may be an ON/OFF type valve consisted of an oil deflector valve  50 - 1  and a sub-chamber valve  50 - 2 . The oil deflector valve  50 - 1  may be provided in the oil deflector  40  to exhaust the oil of the oil deflector  40  to the sub-chamber case  20  when the oil deflector valve  50 - 1  is opened. The sub-chamber valve  50 - 2  may be provided in the sub-chamber case  20  and exhaust the oil in the sub-chamber case  20  to the inner space of the heater  30  when opened. 
     For example, the oil pump  60  may be located on one side of the sub-chamber case  20 , and forms an oil circulation flow that pumps the oil collected in the inner space of the heater  30  to supply the engine  100  during operation. The oil level sensor  70  may be inserted into the sensor hole  26  of the sub-chamber case  20  and mounted on the sensor mounting boss  13  of the main chamber case  10  to detect the oil flow rate stored in the pan body  2 . The oil strainer filters out impurities and foreign matter in the oil. 
     On the other hand,  FIGS. 8A-8B and 9  show an example of adding the function of the heater  30  and the flow valve  50  to the oil flow by the oil temperature using the primary and secondary chambers of the oil pan  1 . 
       FIGS. 8A-8B  show the oil flow state in the oil pan  1  for fast engine oil warm-up in the cold starting condition of the engine  100 . 
     As shown in  FIGS. 8A-8B , in case of the oil temperature of room temperature in cold starting condition of the engine, the room temperature oil (cold oil) is not supplied to the primary chamber of the main chamber case  10  due to the operation of mesh  29  coupled to the first, second and third holes  25 A,  25 B and  25 C of the sub-chamber case  20  and the oil exchange hole  27 , respectively, to stay in the secondary chamber of the sub-chamber case  20 . 
     Therefore, when the engine  100  is operated by the cold starting condition, the ECU  200  supplies the current to the heating element  33  of the heater  30  simultaneously while activating the oil pump  60  with the oil pump ON signal. At the same time, the ECU  200  opens the oil deflector valve  50 - 1  and the sub-chamber valve  50 - 2  together with the valve OPEN signal. 
     The room temperature oil (cold oil) is then exhausted through the hollow boss of the oil deflector  40  to the inner space of the heater  30  and exhausted to the secondary chamber of the sub-chamber case  20  through the simultaneously opened oil deflector valve  50 - 1 . Then, the room temperature oil (cold oil) exhausted from the secondary chamber is collected in the pump chamber  20 - 1 A through the sub-extension chamber  20 - 2 , the sensor chamber  20 - 1 B and the mesh chamber  20 - 1 C, and the room temperature oil (cold oil) collected in the pump chamber  20 - 1 A is exhausted to the inner space of the heater  30  through the opened sub-chamber valve  50 - 2 . As a result, the room temperature oil (cold oil), which is sufficiently gathered in the interior space of the heater  30 , is sent to the engine  100  at a state of temperature raised by heat generation the heating element  35  through the oil pump  60  that performs a pumping operation. 
     Thereafter, the returned oil of the engine  100  is converted into the tempered oil whose temperature has risen through the heat exchange and is flowed into the oil deflector  40 , and the tempered oil is circulated through the same process as the room temperature oil. 
     After the tempered oil is raised to a certain temperature (for example, 80° C.) by repeating the circulation process, the ECU  200  sensing the tempered oil switches the oil flow of the oil pan  1  to the oil flow state shown in  FIGS. 6A-6B . 
     Referring to  FIGS. 9A and 9B , when the tempered oil is raised to a sufficient temperature, the ECU  200  closes the oil deflector valve  50 - 1  and the sub-chamber valve  50 - 2  with the valve CLOSE signal in the operating state of the oil pump  60  by controlling the engine  100  in a cold starting condition release state. At the same time, the ECU  200  cuts off the current supply of the heating element  35  with a heater OFF signal. 
     Then, the tempered oil, which has been raised to a sufficient temperature, is passed through the first, second and third holes  25 A,  25 B and  25 C of the sub-chamber case  20  and flowed into the primary chamber of the main chamber case  10 , to move from the primary chamber to the secondary chamber through each of the oil exchange holes  27  of the sub-chamber case  20 . 
     As a result, The pumping action of the oil pump  60  sucks all of the tempered oil in the primary and secondary chambers so that the oil flow rate is supplied at a sufficient oil flow rate desired by the engine  100  after the cold starting. 
     As described above, the engine system according to the present exemplary form includes the fast oil warm-up type oil pan  1  converting the oil gathered in the secondary chamber to the tempered oil by heating at an oil temperature of the low oil permeation amount to mesh  29  provided in the secondary chamber among the primary and secondary chambers partitioned in the pan body  2 , so that it is possible to rapidly warm-up the engine oil through pre-heating acceleration oil flow rate division by the dual chambers, and particularly, and particularly, it is able to increase warming effects by the heat loss reduction depending on the pre-heating acceleration and improve application by engine specification through high design freedom together. 
     The exemplary form as discussed previously is merely a desirable form which may enable a person (hereinafter referred to as ‘a skilled person in the relevant technology’), who has a typical knowledge in a technology field that the present disclosure belongs to, to execute the present disclosure easily, but the present disclosure is not limited to the aforesaid exemplary form and the attached drawings, and hence this does not result in limiting the scope of right in this present disclosure. Therefore, it will be apparent to a skilled person in the relevant technology that several transposition, transformation, and change is possible within a scope of not deviating from the technological thought in the present disclosure and it is obvious that a easily changeable part by a skilled person in the relevant technology is included within the scope of right in the present disclosure as well.