JP2010203263A - Control device of internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine capable of suitably suppressing the seizure of a sliding part caused by the run-out of an oil film by preventing the excessive high temperature or low viscosity of lubricating oil. <P>SOLUTION: In the control device of the internal combustion engine of a vehicle control system 1, control for selecting and switching a communication path of the lubricating oil between a heat storage part 24 and a bypass path 26 can be executed based on an environment of the engine 100 by a lubricating oil storing means, a lubricating oil supply means, a heat exchange means, an environment determining means, and a lubricating oil bypass means. Therefore, the high temperature lubricating oil follows through the heat storage part 24, and the excess high temperature and low viscosity can be prevented, and the seizure of the sliding part of the engine 100 caused by the run-out of the oil film can be suitably suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control device for an internal combustion engine.

  In an internal combustion engine, a large amount of lubricating oil is circulated in the interior thereof for the purpose of reducing friction and cooling the sliding portion. Since the viscosity of the lubricating oil changes greatly depending on its temperature, the friction of the internal combustion engine is reduced due to the lower temperature and higher viscosity of the lubricating oil in a low temperature environment such as during cold start of the internal combustion engine and low load operation. Increases fuel consumption. Therefore, a technique is known in which the temperature of the lubricating oil is increased by using heat storage of the internal combustion engine, and the friction loss is reduced by circulating the low-viscosity lubricating oil whose temperature has been increased in a low temperature environment. .

  As such a technique, a heat retaining tank independent of the main oil tank is provided, and the stored oil in the heat retaining tank is circulated until the oil temperature rises to a predetermined temperature when the internal combustion engine is started. Patent Document 1 discloses a technique for reducing the friction loss of an engine.

JP 2002-174106 A

  An ECU (Electronic Control Unit) of the internal combustion engine grasps the operating state of the internal combustion engine from various information, calculates the required amount of oil, and executes control for adjusting the circulation amount and pressure of the lubricating oil. For example, the friction loss can be reduced by reducing the circulating amount / pressure of the lubricating oil during low load operation of the internal combustion engine, and the sliding portion of the sliding part can be increased by increasing the circulating amount / pressure of the lubricating oil during high load operation. The friction reducing effect and the cooling capacity can be improved.

Such control of the circulating amount and pressure of lubricating oil is achieved by controlling the circulating amount and pressure of lubricating oil when the internal combustion engine shifts from low-load operation to high-load operation due to misunderstanding of operating conditions or system trouble due to failure. It may not be raised properly. In this case, since the amount of lubricating oil per unit time supplied to each part of the internal combustion engine decreases, cooling the various parts of the internal combustion engine with a smaller amount of lubricating oil absorbs a large amount of the lubricating oil and raises the temperature. To do.
Here, when circulating a high-temperature lubricating oil using heat storage or the like, the high-temperature lubricating oil is further heated by absorbing a large amount of heat while circulating through the internal combustion engine. Becomes excessively high temperature and low viscosity. Therefore, there is a problem that the oil film is cut at each sliding portion of the internal combustion engine, and the sliding portion may be burned.

  Even when the amount of lubricating oil is normally controlled, if the amount of heat stored in the internal combustion engine or the amount of heat generated during operation is large, lubricating oil that has been heated to high temperature using heat storage or the like is used. When it is circulated, the lubricating oil becomes excessively hot and low in viscosity. Therefore, there is a problem that oil film breakage occurs at each sliding portion of the internal combustion engine, and the sliding portion may be seized.

  However, the conventional technique and the techniques disclosed in Patent Documents 1 and 2 do not include means for solving the above-described problems. Therefore, it is difficult to prevent the lubricating oil from being excessively heated and lowered in viscosity, and there is a problem that seizure of the sliding portion cannot be appropriately suppressed.

  The present invention has been made in view of such points, and by preventing the lubricating oil from excessively high temperature and low viscosity, seizure of the sliding portion due to oil film breakage can be appropriately suppressed. An object of the present invention is to provide a control device for an internal combustion engine.

In order to achieve the above object, a control device for an internal combustion engine according to the present invention comprises a lubricating oil storage means for storing lubricating oil circulating in the internal combustion engine, and a lubricating oil stored in the lubricating oil storage means for each part of the internal combustion engine. Lubricating oil supply means for supplying to the oil, heat exchange means for exchanging heat with the lubricating oil supplied by the lubricating oil supply means, and environment determining means for determining the environment of the internal combustion engine And a lubricating oil bypass means for changing the flow path of the lubricating oil to a flow path different from the flow path provided with the heat exchanging means based on the determination result of the environment determining means. (Claim 1).
By adopting such a configuration, it is possible to change the flow path of the lubricating oil based on the determined environment of the internal combustion engine, and therefore it is possible to prevent the lubricating oil from being excessively heated and lowered in viscosity. .

In particular, the control apparatus for an internal combustion engine according to the present invention is characterized in that the lubricating oil supply means makes the supply pressure and supply amount of the lubricating oil supplied to each part of the internal combustion engine variable. 2).
With such a configuration, the supply pressure and supply amount of the lubricating oil supplied to each part of the internal combustion engine can be appropriately controlled according to the environment of the internal combustion engine.

  According to the control apparatus for an internal combustion engine of the present invention, the flow path of the lubricating oil can be changed to a flow path different from the flow path provided with the heat exchange means based on the environment of the internal combustion engine. Therefore, the seizure of the sliding portion due to the oil film breakage can be appropriately suppressed by preventing the lubricating oil from being excessively heated and lowered in viscosity.

It is the block diagram which showed schematic structure of the vehicle control system incorporating the control apparatus of the internal combustion engine of an Example. 1 shows a flow path of a lubricating oil according to the present invention. The flow of control which ECU of an example performs is shown. The flow of control which ECU of an example performs is shown.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing the present invention will be described in detail with reference to the drawings.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a schematic configuration of a vehicle control system 1 incorporating a control device for an internal combustion engine of the present invention. FIG. 1 shows only a partial configuration of the vehicle control system.

  A vehicle control system 1 shown in FIG. 1 includes an engine 100 that is an internal combustion engine, and includes a lubrication device 51 inside the engine 100. The vehicle control system 1 includes an ECU 10 that comprehensively controls the operation of the lubrication device 51 and the engine 100.

The engine 100 is a multi-cylinder engine mounted on a vehicle, and each cylinder includes a piston that constitutes a combustion chamber. The piston of each combustion chamber is connected to a crankshaft as an output shaft member via a connecting rod.
The mixed gas flowing into the combustion chamber from the intake port is compressed in the combustion chamber by the upward movement of the piston. The ECU 10 determines the ignition timing and sends a signal to the igniter based on the position of a piston from a crank angle sensor 31 to be described later and the information of the cam shaft rotation phase from the intake cam angle sensor. The igniter energizes the spark plug with the electric power from the battery at the instructed ignition timing according to the signal from the ECU 10. The spark plug is ignited by electric power from the battery, ignites the compressed mixed gas, expands in the combustion chamber, and lowers the piston. The descending motion is changed to the shaft rotation of the crankshaft through the connecting rod, whereby the engine 100 obtains power.

  A crank angle sensor 31 is provided in the vicinity of the output shaft of the crankshaft. The crank angle sensor 31 is configured to detect the rotation angle of the crankshaft, and transmits the detection result to the ECU 10. Thereby, ECU10 acquires the information regarding a crank angle, such as the engine speed and rotational angular velocity at the time of driving | operation, and recognizes the environment of the engine 100 based on the information.

  A water jacket is provided around the combustion chamber of the engine 100, and engine cooling water for cooling the combustion chamber circulates inside the water jacket. Further, the water jacket is provided with a water temperature sensor 32 for measuring the temperature of the engine cooling water, and the detection result of the engine cooling water temperature is transmitted to the ECU 10. Thereby, ECU 10 acquires information related to the temperature of engine 100 and recognizes the environment of engine 100 based on the information.

  The oil pan 21 of the engine 100 is provided with a lubrication device 51. The lubrication device 51 includes a supply pump 22, a relief valve 23, and a heat storage unit 24, which are communicated with each other through a flow path 25. The lubricating device 51 includes a bypass path 26. The bypass path 26 branches off from the distribution path 25 on the upstream side of the heat storage unit 24 and merges with the distribution path 25 on the downstream side of the heat storage unit 24. A three-way valve 27 is provided at a branch point between the distribution path 25 and the bypass path 26.

Oil pan 21 stores lubricating oil that circulates inside engine 100. Lubricating oil stored in the oil pan 21 is pumped up by a supply pump 22 and passes from a strainer to a part of the engine 100 (crank journal, head cam cam, etc.) through a distribution path 25 through an oil cooler, an oil filter, and a heat storage part 24. And pumped. The lubricating oil circulated through each part of the engine 100 is returned to the oil pan 21 through the return path, and then pumped up again by the supply pump 22 to circulate through each part of the engine 100.
The oil pan 21 corresponds to the lubricating oil storage means of the present invention.

  The oil pan 21 includes an oil temperature sensor 33. The oil temperature sensor 33 is configured to detect the temperature of the lubricating oil stored in the oil pan, and transmits the detection result to the ECU 10. Thereby, ECU10 acquires the information regarding the temperature of lubricating oil, and recognizes the environment of engine 100 based on the information. In this case, the installation location of the oil temperature sensor 33 is not specified at the above position, and can be provided at any position where the temperature of the lubricating oil can be detected.

The supply pump 22 pumps up the lubricating oil stored in the oil pan 21 and supplies it by pressure to each part of the engine 100 through the distribution path 25. The supply pump 22 preferably has a configuration in which the pressure and amount of lubricating oil can be arbitrarily adjusted in accordance with an instruction from the ECU 10, but a mechanical type that is driven by synchronizing with the rotation of the engine 100, and electric power from the battery Any of the electric type driven by may be adopted. In particular, when the supply pump 22 is mechanical, a well-known control valve is provided in the flow path 25 on the downstream side of the supply pump 22, and the opening degree of the control valve is adjusted in accordance with an instruction from the ECU 10. It is also possible to vary the pressure and oil amount of the lubricating oil supplied by pressure.
The supply pump 22 corresponds to the lubricating oil supply means of the present invention.

The relief valve 23 is provided in parallel with the supply pump 22. A well-known control valve such as a solenoid type can be used as the relief valve 23. The valve is opened in accordance with an instruction from the ECU 10, and a part of the lubricating oil is returned to the oil pan 21 to be supplied to each part of the engine 100. Make the pressure and amount of lubricating oil variable. The ECU 10 receives the detection result of the oil pressure sensor 34 or the oil amount sensor 35, and instructs the relief valve 23 to open when the pressure / oil amount of the lubricating oil pumped from the supply pump 22 exceeds a specified value. Thus, the pressure and amount of the lubricating oil supplied to each part of the engine 100 are adjusted. In this case, the installation of the relief valve 23 can be omitted when the supply pump 22 has a configuration in which the pressure and amount of lubricating oil can be arbitrarily adjusted in accordance with an instruction from the ECU 10.
The relief valve 23 corresponds to the lubricating oil supply means of the present invention.

The heat storage unit 24 is installed on the distribution path 25 to store heat generated during the previous operation of the engine 100 and exchange heat with the lubricating oil flowing through the interior during the current operation. Thereby, the temperature of the lubricating oil can be raised using the heat stored in the heat storage unit 24 during the cold operation of the engine 100. As the heat storage unit 24, a well-known heat storage member that can store heat of the internal combustion engine for a long time and exchange heat with the lubricating oil can be applied, but a container shape that can store a part of the lubricating oil is used. You can also. In that case, a part of the lubricating oil whose temperature has increased during the previous operation can be kept warm by adopting a well-known thermos structure in which the container has a vacuum heavy structure and the inner surface of the container is covered with a light reflecting film. Thereby, the high-temperature lubricating oil stored in the heat storage unit 24 during the cold operation of the engine 100 can be circulated. Further, by providing a heater on the heat storage unit 24 or independently, the temperature may be increased by exchanging heat with the lubricating oil flowing through the flow path 25.
The heat storage unit 24 corresponds to the heat exchange means of the present invention.

  The heat storage unit 24 includes a temperature sensor 36. The temperature sensor 36 is configured to detect the temperature of the heat storage unit 24, and transmits the detection result to the ECU 10. Thereby, ECU10 acquires the information regarding the temperature of the thermal storage part 24, and estimates the temperature of the lubricating oil which can be raised by heat-exchanging with the thermal storage part 24. FIG.

The distribution path 25 branches off from the bypass path 26 between the supply pump 22 and the heat storage unit 24, and a three-way valve 27 is provided at the branch point. The three-way valve 27 changes the flow path of the lubricating oil by switching the communication inside the flow path 25 between the heat storage section 24 direction and the bypass path 26 direction in accordance with an instruction from the ECU 10. As the three-way valve 27, a known control valve such as a solenoid type can be applied.
The bypass path 26 and the three-way valve 27 correspond to the lubricating oil bypass means of the present invention.

  A distribution path 25 between the supply pump 22 and the three-way valve 27 is provided with a hydraulic sensor 34 that detects the pressure of the lubricating oil in the engine 100 and an oil amount sensor 35 that detects the amount of the lubricating oil. Both sensors detect the pressure of the lubricating oil and the amount of oil, and transmit the detection result to the ECU 10. Thereby, ECU 10 acquires information on the lubricating oil such as the pressure and amount of lubricating oil circulating inside engine 100 and recognizes the environment of engine 100 based on the information. In this case, the installation location of both sensors is not specified at the above position, and can be provided at an arbitrary position where the pressure and amount of the lubricating oil can be detected.

  The ECU 10 includes a CPU (Central Processing Unit) that performs arithmetic processing, a ROM (Read Only Memory) that stores programs, a RAM (Random Access Memory) that stores data, and an NVRAM (Non Volatile RAM). It is a computer. The ECU 10 reads the detection results of various sensors such as a crank angle sensor 31, a water temperature sensor 32, an oil temperature sensor 33, a hydraulic pressure sensor 34, and an oil amount sensor 35, and operates the throttle valve, intake valve, exhaust valve, and injector. And the operation of the engine 100 such as the ignition timing of the spark plug are controlled in an integrated manner.

In addition, the ECU 10 determines the environment of the engine 100 and controls the three-way valve 27 based on the determination result, thereby changing the flow path of the lubricating oil to suppress excessively high temperature and low viscosity. To do.
FIG. 2 shows a lubricating oil flow path according to the present invention. In FIG. 2, the arrows indicate the flow direction of the lubricating oil. First, the ECU 10 receives detection signals from various sensors, and recognizes the environment of the engine 100 based on the received detection results. Here, the environment of the engine 100 refers to the output of the engine 100 detected by the crank angle sensor 31, the water temperature sensor 32, the oil temperature sensor 33, the oil pressure sensor 34, and the oil amount sensor 35, the rotation speed, the water temperature, the oil temperature, and the oil pressure. , Refers to at least one of the oil amounts, but is not limited to this, and other detection results may be employed.

Subsequently, the ECU 10 determines whether or not the recognized environment of the engine 100 is an environment in which the temperature of the lubricating oil needs to be increased. If it is determined that the temperature of the lubricating oil needs to be raised, the three-way valve 27 is commanded to communicate the heat storage section 24 direction. As a result, the lubricant oil can be supplied to each part of the engine 100 after heat exchange in the heat storage part 24, so that friction loss can be reduced (see FIG. 2A).
On the other hand, when the recognized environment of the engine 100 determines that the temperature of the lubricating oil does not need to be raised, the ECU 10 instructs the three-way valve 27 to communicate the bypass path 26 direction. As a result, the lubricating oil can be supplied to each part of the engine 100 by bypassing the heat accumulating section 24, so that excessively high temperature and low viscosity of the lubricating oil can be suppressed (see FIG. 2B). ).

As described above, by executing the above-described control, it is possible to selectively change the lubricating oil flow path to either the heat storage unit 24 or the bypass path 26 based on the environment of the engine 100. Therefore, it is possible to prevent excessively high temperature and low viscosity by circulating high-temperature lubricating oil through the heat exchanging portion, and accordingly appropriately suppress seizure due to oil film breakage of the sliding portion of the internal combustion engine. be able to.
The ECU 10 corresponds to the environment determination unit of the present invention.

  Next, the operation of the vehicle control system 1 will be described along the control flow of the ECU 10. FIG. 3 is a flowchart illustrating an example of processing of the ECU 10. The vehicle control system 1 according to the present embodiment includes a lubricating oil storage unit, a lubricating oil supply unit, a heat exchange unit, an environment determination unit, and a lubricating oil bypass unit, so that lubrication is performed based on the environment of the internal combustion engine. Control is performed to selectively change the oil flow path to either the heat exchange section or the bypass section.

  The control of the ECU 10 is started when an engine start request is made, that is, when the ignition switch is turned on. First, in step S1, the ECU 10 receives detection signals from various sensors and recognizes the environment of the engine 100. The ECU 10 proceeds to the next step S2 after completing the process of step S1.

  In step S2, the ECU 10 determines whether the temperature of the heat storage unit 24 is higher than the temperature of the lubricating oil based on the detection results of the oil temperature sensor 33 and the temperature sensor 36. In this case, the ECU 10 may apply the detection result of the water temperature sensor 32 instead of the detection result of the oil temperature sensor 33. When the temperature of the heat storage unit 24 is lower than the temperature of the lubricating oil (step S2 / NO), the ECU 10 proceeds to A of FIG. When the temperature of the heat storage unit 24 is higher than the temperature of the lubricating oil (step S2 / YES), the ECU 10 proceeds to the next step S3.

  In step S3, the ECU 10 determines whether or not the temperature of the lubricating oil is less than the first threshold value based on the detection result of the oil temperature sensor 33. Here, the first threshold value is a sufficiently high oil temperature at which it can be determined that control for reducing the pressure / circulation amount of the lubricating oil should not be executed because the engine 100 has a relatively high output. can do. In this case, the ECU 10 may apply the detection result of the water temperature sensor 32 instead of the detection result of the oil temperature sensor 33. When the temperature of the lubricating oil is lower than the first threshold value (step S3 / YES), the ECU 10 proceeds to step S6. If the temperature of the lubricating oil is not less than the first threshold value (step S3 / NO), the ECU 10 proceeds to the next step S4.

In step S4, the ECU 10 deactivates the control for reducing the pressure / circulation amount of the lubricating oil, and instructs the three-way valve 27 to open the bypass path 26 in the next step S5. By executing this control, when the temperature of the lubricating oil of the engine 100 is sufficiently high, it is possible to prevent the lubricating oil from being excessively heated and lowered in viscosity through the heat exchange section. .
ECU10 complete | finishes the process of control, after finishing the process of step S5.

  If the determination in step S3 is YES, the ECU 10 proceeds to step S6. In step S6, the ECU 10 determines whether or not the load of the engine 100 is less than the second threshold value based on the detection result of the crank angle sensor 31. Here, the second threshold value refers to applying a sufficiently low load that can be determined that the control for reducing the pressure / circulation amount of the lubricating oil should be executed because the engine 100 has a low output. it can. In this case, the ECU 10 may determine the load of the engine 100 based on other detection results such as the intake air amount and the exhaust gas temperature instead of the detection results of the crank angle sensor 31. If the load on engine 100 is not less than the second threshold value (step S6 / NO), ECU 10 proceeds to step S9. If the load on engine 100 is less than the second threshold value (step S6 / YES), ECU 10 proceeds to next step S7.

  In step S7, the ECU 10 executes control for reducing the pressure / circulation amount of the lubricating oil. In this case, the control for reducing the pressure / circulation amount of the lubricating oil can be executed by adjusting the amount of the lubricating oil pumped from the supply pump 22 or the opening of the relief valve 23. The ECU 10 proceeds to the next step S8 after completing the process of step S7.

In step S8, the ECU 10 instructs the three-way valve 27 to open the heat storage unit 24 direction. By executing this control, when the temperature of the lubricating oil of the engine 100 is low, the lubricating oil can be supplied to each part of the engine 100 after exchanging heat in the heat storage unit 24. Therefore, the lubricating oil has a low viscosity. Therefore, friction loss can be reduced.
ECU10 complete | finishes the process of control, after finishing the process of step S8.

  If the determination in step S6 is no, the ECU 10 proceeds to step S9. In step S9, the ECU 10 cancels the execution of the control for reducing the pressure / circulation amount of the lubricating oil, and in the next step S10, based on the detection result of the hydraulic sensor 34 (or the oil amount sensor 35), It is determined whether the hydraulic pressure (oil amount) is greater than a third threshold value. Here, as the third threshold value, a sufficiently high hydraulic pressure (amount of oil) that is considered not to cause an oil film breakage at the sliding portion even when the lubricating oil exchanges heat with the heat storage portion 24 can be applied. When the oil pressure (oil amount) of the lubricating oil is larger than the third threshold value (step S10 / YES), the ECU 10 proceeds to step S8 and instructs the three-way valve 27 to open the direction of the heat storage unit 24. When the oil pressure (oil amount) of the lubricating oil is not greater than the third threshold value (step S10 / NO), the ECU 10 proceeds to step S5 and instructs the three-way valve 27 to open the bypass path 26 direction.

  Next, processing after A in FIG. 4 will be described. If the determination in step S2 is no, the ECU 10 proceeds to step S11. In step S11, the ECU 10 determines whether or not the temperature of the lubricating oil is less than a fourth threshold value based on the detection result of the oil temperature sensor 33. Here, the fourth threshold value can be determined that there is a possibility that the oil film of the sliding portion of the engine 100 may be cut, and is compared with the temperature detected by the water temperature sensor 32 to determine the warm-up state of the engine 100. A sufficiently high lubricant temperature can be applied. In this case, the ECU 10 may apply the detection result of the water temperature sensor 32 instead of the detection result of the oil temperature sensor 33. When the temperature of the lubricating oil is lower than the fourth threshold value (step S11 / YES), the ECU 10 proceeds to step S13. When the temperature of the lubricating oil is not lower than the fourth threshold value (step S11 / NO), the ECU 10 proceeds to the next step S12.

In step S12, the ECU 10 instructs the three-way valve 27 to open the heat storage unit 24 direction. By executing this control, when the temperature of the lubricating oil of the engine 100 is high enough to cause the oil film to break, the lubricating oil is supplied to each part of the engine 100 after heat exchange in the lower temperature heat storage unit 24. Can do. Therefore, by reducing the temperature and increasing the viscosity of the lubricating oil, it is possible to suppress seizure due to the oil film running out of the sliding portion of the engine 100 and to absorb the excess heat after the engine 100 is warmed up to the heat storage portion 24. Heat storage can be started.
ECU10 complete | finishes the process of control, after finishing the process of step S12.

If the determination in step S11 is YES, the ECU 10 proceeds to step S13. In step S13, the ECU 10 commands the three-way valve 27 to open the bypass path 26 direction. By executing this control, the lubricating oil can be supplied to each part of the engine 100 by bypassing the cooler heat storage unit 24. Therefore, it is possible to suppress an increase in friction loss of engine 100 by suppressing the low temperature and high viscosity of the lubricating oil.
ECU10 complete | finishes the process of control, after finishing the process of step S13.

  As described above, the vehicle control system 1 according to the present embodiment is based on the environment of the internal combustion engine by the lubricating oil storage means, the lubricating oil supply means, the heat exchange means, the environment determination means, and the lubricating oil bypass means. Therefore, it is possible to carry out control to selectively change the flow path of the lubricating oil to either the heat exchange part or the bypass part, so that the oil film is prevented by excessively increasing the temperature and viscosity of the lubricating oil. The seizure of the sliding part due to cutting can be appropriately suppressed.

  The above embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to these, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

1 Vehicle Control System 10 ECU (Environment Determination Unit)
21 Oil pan (lubricating oil storage means)
22 Supply pump (lubricating oil supply means)
23 Relief valve (lubricant supply means)
24 heat storage part (heat exchange means)
25 Distribution route 26 Bypass route (lubricant bypass means)
27 Three-way valve (lubricant bypass means)
31 Crank angle sensor 32 Water temperature sensor 33 Oil temperature sensor 34 Oil pressure sensor 35 Oil amount sensor 36 Temperature sensor 51 Lubricator 100 Engine

Claims (2)

Lubricating oil storage means for storing lubricating oil circulating in the internal combustion engine;
Lubricating oil supply means for supplying the lubricating oil stored in the lubricating oil storage means to each part of the internal combustion engine;
Heat exchange means provided on the lubricating oil flow path for exchanging heat with the lubricating oil supplied by the lubricating oil supply means;
Environment determining means for determining the environment of the internal combustion engine;
Lubricating oil bypass means for changing the flow path of the lubricating oil to a flow path different from the flow path provided with the heat exchange means based on the determination result of the environment determining means;
A control device for an internal combustion engine, comprising:   2. The control apparatus for an internal combustion engine according to claim 1, wherein the lubricating oil supply means varies a supply pressure and a supply amount of the lubricating oil supplied to each part of the internal combustion engine.

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