JP6601564B2 - Oil supply system - Google Patents

Description

Cross-reference to related applications

  This application is based on Japanese Patent Application No. 2016-147546 filed on Jul. 27, 2016, the description of which is incorporated herein by reference.

  The present disclosure relates to an oil supply system that heats or cools automatic transmission oil (hereinafter referred to as “AT oil”) used in an automatic transmission of a vehicle.

  Conventionally, an oil supply system that heats or cools AT oil used in an automatic transmission of a vehicle is known. The oil supply system cools AT oil to an appropriate temperature during normal operation of the engine, maintains the viscosity of AT oil, and prevents deterioration.

  Moreover, the conventional oil supply system heats AT oil using engine cooling water at the time of engine warm-up operation, and reduces the viscosity of AT oil. As a result, the energy consumption of the oil pump for circulating the AT oil is reduced, and the frictional resistance of the gear mechanism of the automatic transmission is reduced. Therefore, the oil supply system can improve fuel efficiency during engine warm-up operation.

  By the way, at the time of engine warm-up operation, it is preferable to warm the engine body and engine oil early in order to reduce fuel consumption. In the engine system described in Patent Document 1, a portion of the engine intake passage that is closer to the engine than the compressor of the supercharger is connected to a portion of the intake passage that is on the opposite side of the engine from the compressor by a bypass passage. ing. In this engine system, when the engine is warmed up, a part of the air compressed by the compressor flows into the bypass passage and is compressed again by the compressor, thereby increasing the heating amount of the air supplied to the engine and the engine and the engine. It is possible to warm the oil early.

German Patent Application Publication No. 10201415225

  In recent years, in order to warm up the engine body and engine oil at an early stage during engine warm-up operation, a technique for stopping circulation of engine cooling water has been studied. As a result of detailed studies on this technology, the inventors have found the following problems. That is, when the engine coolant circulation is stopped during the engine warm-up operation, the AT oil cannot be heated using the engine coolant. Thereby, when the viscosity of the AT oil is high, the energy consumption of the oil pump for circulating the AT oil increases, and the frictional resistance of the gear mechanism of the automatic transmission increases. Therefore, there is a concern that the fuel consumption during engine warm-up operation deteriorates.

  The engine system described in Patent Document 1 described above can warm the engine and engine oil using air compressed by a compressor during engine warm-up operation, but does not heat AT oil. Absent.

  An object of the present disclosure is to provide an oil supply system capable of heating AT oil without using engine cooling water during engine warm-up operation.

The invention according to claim 1 is an oil supply system for heating or cooling AT oil used in an automatic transmission connected to an engine,
The engine includes a turbocharger having a turbine (6) provided in an exhaust passage (5) of the engine and a compressor (7) for compressing air in the intake passage (4) by the torque of the turbine and supplying the compressed air to the engine. It is prepared
An oil pump that discharges AT oil pumped from the oil pan;
Piping for supplying AT oil discharged from the oil pump to each part of the hydraulic mechanism of the automatic transmission, or discharging AT oil from each part of the hydraulic mechanism;
A heat exchanger that is provided in a place where the heated air flows when the engine is warmed up in the engine room, and performs heat exchange between the AT oil supplied through the piping and the heated air;
A bypass passage (25) for connecting a portion of the intake passage closer to the engine than the compressor and a portion of the intake passage opposite to the engine with respect to the compressor;
A switching valve (26, 28) for switching between a communication state and a blocking state between the intake passage and the bypass passage, or adjusting a flow passage cross-sectional area of the bypass passage,
The hydraulic mechanism is operated by hydraulic pressure ,
The heat exchanger (22) is provided in a bypass passage through which air compressed by the compressor flows as a place where the temperature of the air rises during the warm-up operation of the engine, and performs heat exchange between the air flowing through the bypass passage and the AT oil. Is.
The invention according to claim 3 is an oil supply system for heating or cooling AT oil used in an automatic transmission (2) connected to an engine (3),
An oil pump (20) for discharging AT oil pumped from the oil pan (24);
A pipe (21) for supplying AT oil discharged from the oil pump to a hydraulic mechanism of the automatic transmission or discharging AT oil from the hydraulic mechanism;
A heat exchanger that is provided in a place where the air that has been heated during engine warm-up operation flows in the engine room, and that performs heat exchange between the AT oil supplied through the pipe and the air that has been heated;
The hydraulic mechanism is operated by hydraulic pressure,
The engine includes a turbocharger having a turbine (6) provided in an exhaust passage (5) of the engine and a compressor (7) for compressing air in the intake passage (4) by the torque of the turbine and supplying the compressed air to the engine. It is prepared
The oil supply system
A bypass passage that connects a portion of the intake passage closer to the engine than the position where the compressor is provided, and a portion of the intake passage that is opposite to the engine with respect to the compressor;
A switching valve that switches between a communication state and a blocking state between the intake passage and the bypass passage, or adjusts a flow passage cross-sectional area of the bypass passage;
A fan capable of switching between a forward rotation operation for flowing air from the radiator side to cool the engine cooling water to the engine side and a reverse rotation operation for flowing air from the engine side or the engine exhaust passage side to the radiator side;
A plurality of heat exchangers,
Among the plurality of heat exchangers, the heat exchanger provided in the bypass passage is referred to as a bypass passage heat exchanger (22). Among the plurality of heat exchangers, air is moved during forward rotation operation and reverse rotation operation of the fan. When the heat exchanger provided in the flowing place is called an engine room heat exchanger (29),
The bypass passage heat exchanger and the engine room heat exchanger are connected by piping.

  According to this, the heat exchanger can heat the AT oil using air that is heated by the engine warm-up operation without using the engine cooling water during the engine warm-up operation. As a result, the viscosity of the AT oil is reduced, so that the energy consumption of the oil pump for circulating the AT oil is reduced and the frictional resistance of the gear mechanism of the automatic transmission is reduced. Therefore, this oil supply system can improve fuel efficiency during engine warm-up operation.

It is a figure which shows the structure of the oil supply system concerning 1st Embodiment. It is a figure which shows the structure of the oil supply system concerning 2nd Embodiment. It is a figure which shows the structure of the oil supply system concerning 2nd Embodiment. It is a figure which shows the structure of the oil supply system concerning 3rd Embodiment. It is a figure which shows the structure of the oil supply system concerning 4th Embodiment. It is a figure which shows the structure of the oil supply system concerning 5th Embodiment. It is a figure which shows the structure of the oil supply system concerning 5th Embodiment. It is a figure which shows the structure of the oil supply system concerning 6th Embodiment. It is a figure which shows the structure of the oil supply system concerning 6th Embodiment. It is a figure which shows the structure of the oil supply system concerning 7th Embodiment.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals.

(First embodiment)
A first embodiment will be described with reference to the drawings. The oil supply system 1 of the present embodiment supplies AT oil to various hydraulic mechanisms provided in the automatic transmission 2, heats AT oil when the engine 3 is warmed up, and supplies AT oil during normal operation of the engine 3. It can be cooled.

<Configuration in the engine room>
First, the structure in the engine room of the vehicle in which the oil supply system 1 of this embodiment is mounted will be described.

  FIG. 1 is a schematic view in an engine room. The engine 3 illustrated in FIG. 1 is, for example, a reciprocating engine. The engine 3 draws a mixture of air and fuel from a suction passage 4 into a cylinder (not shown) by reciprocating movement of a piston (not shown), compresses and burns the mixture, and then burns the mixture. The generated exhaust gas is discharged from the exhaust passage 5. The engine 3 can obtain torque by converting the reciprocating motion of the piston into a rotational motion by a crankshaft (not shown).

  The engine 3 of this embodiment includes a supercharger. The supercharger has a turbine 6 provided in the exhaust passage 5 of the engine 3 and a compressor 7 provided in the intake passage 4. The supercharger rotates the compressor 7 by the torque of the turbine 6 rotated by the flow of exhaust gas, compresses the air in the intake passage 4 and supplies the compressed air to the engine 3.

  The intake passage 4 is provided with a water-cooled intercooler 8 and a throttle valve 9 on the engine 3 side from the compressor 7. The water-cooled intercooler 8 increases the combustion efficiency of the engine 3 by cooling the high-temperature and high-pressure supercharged air compressed by the compressor 7 and increasing the air density. The throttle valve 9 adjusts the amount of intake air taken into the engine 3.

  The water jacket 10, the radiator 11, the water pump 12, the thermostat 13, and the water-cooled heat exchanger 23 provided on the engine main body and the engine head are connected by a pipe 15 or the like to constitute a cooling device. A fan 16 is provided on the side of the radiator 11 on the engine 3 side.

  The water pump 12 is driven by torque transmitted from the crankshaft of the engine 3. When the water pump 12 is driven during the normal operation of the engine 3 and the thermostat 13 is open, the cooling water circulates through the cooling device. At this time, the cooling water absorbs heat from the engine 3 when flowing through the water jacket 10, thereby cooling the engine 3 and radiating heat to the air when flowing through the radiator 11. Further, when the cooling water circulates through the cooling device during the normal operation of the engine 3, the cooling water and the AT oil exchange heat with the water-cooled heat exchanger 23 to cool the AT oil.

  The automatic transmission 2 is connected to the crankshaft of the engine 3. The automatic transmission 2 has a function of automatically switching the torque and the rotational speed output from the engine 3 according to the rotational speed and load of the engine 3 and transmitting them to the drive wheel side. The automatic transmission 2 has various hydraulic mechanisms such as a torque converter and a gear mechanism (not shown).

<Configuration of oil supply system 1>
Next, the configuration of the oil supply system 1 will be described.

  The oil supply system 1 of this embodiment includes an oil pump 20, a pipe 21 connected to the oil pump 20, and two heat exchangers 22 and 23 connected by the pipe 21.

  The oil pump 20 pumps AT oil from the oil pan 24 of the automatic transmission 2 and discharges the AT oil to a pipe 21 connected to a hydraulic mechanism. The pipe 21 supplies AT oil to each part of the hydraulic mechanism of the automatic transmission 2. The pipe 21 discharges AT oil from each part of the hydraulic mechanism. Two heat exchangers 22 and 23 are connected in series to the pipe 21.

  Of the two heat exchangers, the first heat exchanger 22 is an air-cooled heat exchanger installed in the bypass passage 25. The first heat exchanger 22 will be referred to as a bypass passage heat exchanger 22.

  The bypass passage 25 connects a portion of the intake passage 4 that is closer to the engine 3 than the compressor 7 and a portion of the intake passage 4 that is opposite to the engine 3 with respect to the compressor 7. A switching valve 26 is provided in the bypass passage 25. The switching valve 26 can switch between a communication state and a cutoff state between a portion of the intake passage 4 closer to the engine 3 than the compressor 7 and the bypass passage 25. Moreover, the switching valve 26 can also adjust the flow-path cross-sectional area of the bypass passage 25 of the site | part in which the switching valve 26 was provided.

  When the switching valve 26 opens, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 downstream of the compressor 7 to the bypass passage 25 flows. Therefore, it can be said that the bypass passage 25 provided with the bypass passage heat exchanger 22 is a place where the temperature of the air rises during the warm-up operation of the engine 3 in the engine room. The bypass passage heat exchanger 22 can exchange heat between the AT oil supplied through the pipe 21 and the heated air flowing through the bypass passage 25.

  Of the two heat exchangers described above, the second heat exchanger 23 is a water-cooled heat exchanger 23 that constitutes the above-described cooling device. This water-cooled heat exchanger 23 exchanges heat between the AT oil supplied through the pipe 21 and the cooling water of the engine 3 during normal operation of the engine 3, so that the AT oil has a temperature suitable for use of the hydraulic mechanism. It is possible to cool down.

<Operation of oil supply system 1>
Subsequently, the operation of the oil supply system 1 of the present embodiment will be described.

<During warm-up operation>
During the warm-up operation of the engine 3, the thermostat 13 of the cooling device is closed in order to warm the engine body and engine oil early. Therefore, the cooling water does not circulate through the cooling device. Therefore, the water-cooled heat exchanger 23 hardly exchanges heat between the cooling water and the AT oil.

  During the warm-up operation of the engine 3, the switching valve 26 provided in the bypass passage 25 is opened, and the portion of the intake passage 4 closer to the engine 3 than the compressor 7 communicates with the bypass passage 25. As a result, as indicated by an arrow 100, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 closer to the engine 3 than the compressor 7 to the bypass passage 25 flows. Therefore, heat exchange between the heated air flowing through the bypass passage 25 and the AT oil is performed by the bypass passage heat exchanger 22, and the AT oil is heated. As a result, the viscosity of the AT oil decreases. Therefore, the energy consumed by the oil pump 20 during the warm-up operation of the engine 3 is reduced, and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced.

  When the temperature of the AT oil is high to some extent during the warm-up operation of the engine 3 and the amount of heat required for heating the AT oil may be small, the switching valve 26 adjusts the flow passage cross-sectional area of the bypass passage 25. It is also possible to reduce the flow rate of the air flowing through the bypass passage 25. Thereby, the heating amount of AT oil by the bypass passage heat exchanger 22 can be adjusted.

<During normal operation>
During normal operation of the engine 3, the thermostat 13 of the cooling device is opened. Therefore, the cooling water circulates through the cooling device. Thereby, in the water-cooled heat exchanger 23, heat exchange between the cooling water and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  During normal operation of the engine 3, the switching valve 26 provided in the bypass passage 25 is closed, and the inflow of air from the intake passage 4 to the bypass passage 25 is blocked. Thereby, the temperature rise of the AT oil flowing through the bypass passage heat exchanger 22 is prevented.

  The oil supply system 1 of 1st Embodiment demonstrated above has the following effect.

  (1) In the first embodiment, the bypass passage heat exchanger 22 is installed in a place where air that has been heated during the warm-up operation of the engine 3 flows in the engine room. Heat exchange with the air.

  According to this, the bypass passage heat exchanger 22 can heat the AT oil by using the air heated by the warm-up operation of the engine 3 without using the engine coolant during the warm-up operation of the engine 3. Is possible. As a result, the viscosity of the AT oil is reduced, so that the energy consumption of the oil pump 20 is reduced and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced. Therefore, the oil supply system 1 can improve the fuel efficiency when the engine 3 is warmed up.

  (2) In the first embodiment, the bypass passage heat exchanger 22 is provided in a passage through which air compressed by the compressor 7 flows as a place where the temperature of the air rises during the warm-up operation of the engine 3.

  According to this, the temperature of the air compressed by the compressor 7 rises. The bypass passage heat exchanger 22 can heat the AT oil using the heat of the air.

  (3) In the first embodiment, the oil supply system 1 includes a switching valve 26 that switches between a communication state and a blocking state between the intake passage 4 and the bypass passage 25 and adjusts a flow passage cross-sectional area of the bypass passage 25. .

  According to this, during the normal operation of the engine 3, the switching valve 26 blocks the inflow of air from the intake passage 4 to the bypass passage 25, thereby preventing an increase in the temperature of the AT oil flowing through the bypass passage heat exchanger 22. It is possible. Therefore, it is possible to prevent the AT oil from being deteriorated due to the temperature rise.

  (4) In the first embodiment, the bypass passage heat exchanger 22 and the water-cooled heat exchanger 23 are connected in series by the pipe 21.

  According to this, during the normal operation of the engine 3, the oil supply system 1 cools the AT oil by the water-cooled heat exchanger 23 and circulates the AT oil in the bypass passage heat exchanger 22 to increase the temperature. The deterioration of AT oil can be prevented.

(Second Embodiment)
A second embodiment will be described.

  As shown in FIG. 3, in the second embodiment, the bypass passage 25 has an opening 27 through which outside air can be introduced. As shown in FIGS. 2 and 3, the switching valve 28 of the second embodiment is a door type switching valve 28 provided in the vicinity of the opening 27. The switching valve 28 switches a communication state and a blocking state between a portion of the intake passage 4 closer to the engine 3 than the compressor 7 and the bypass passage 25, and a communication state and a blocking state between the space outside the opening 27 and the bypass passage 25. It is possible to switch states. In the following description, a door-type switching valve 28 that is an example of the switching valve 28 is referred to as a switching door 28. The switching valve 28 is not limited to a door type, and various types such as a slide type or a rotary type can be adopted.

<Operation of oil supply system 1>
The operation of the oil supply system 1 of the second embodiment will be described.

<During warm-up operation>
Also in the second embodiment, when the engine 3 is warming up, the thermostat 13 of the cooling device is closed in order to warm the engine body and engine oil early. Therefore, the cooling water does not circulate through the cooling device. Therefore, the water-cooled heat exchanger 23 hardly exchanges heat between the cooling water and the AT oil.

  As shown in FIG. 2, during the warm-up operation of the engine 3, the switching door 28 provided in the bypass passage 25 communicates the intake passage 4 and the bypass passage 25, and the space outside the opening 27 and the bypass passage 25. Block the air flow between them. As a result, as indicated by an arrow 100, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 downstream of the compressor 7 to the bypass passage 25 flows. Therefore, the bypass passage heat exchanger 22 exchanges heat between the heated air flowing through the bypass passage 25 and the AT oil, thereby heating the AT oil.

<During normal operation>
During normal operation of the engine 3, the thermostat 13 of the cooling device is opened. Therefore, the cooling water circulates through the cooling device. Thereby, in the water-cooled heat exchanger 23, heat exchange between the cooling water and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  As shown in FIG. 3, during normal operation of the engine 3, the switching door 28 provided in the bypass passage 25 blocks the inflow of air from the intake passage 4 to the bypass passage 25, and the space outside the opening 27. It communicates with the bypass passage 25. As a result, the outside air is introduced from the opening 27 into the bypass passage 25 as indicated by an arrow 101. Therefore, in the bypass passage heat exchanger 22, heat exchange between the outside air and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  In the second embodiment described above, by providing the switching door 28 in the bypass passage 25, the bypass passage heat exchanger 22 can cool the AT oil by the air flowing through the bypass passage 25 during normal operation of the engine 3. it can.

(Third embodiment)
A third embodiment will be described.

  As shown in FIG. 4, the oil supply system 1 of the third embodiment does not include the bypass passage heat exchanger 22 and the water-cooled heat exchanger 23. Instead, the oil supply system 1 includes an air-cooled heat exchanger 29 provided in the engine room. This heat exchanger 29 will be referred to as an engine room heat exchanger 29.

  Moreover, in 3rd Embodiment, the fan 16 provided in the engine 3 side of the radiator 11 can switch normal rotation operation | movement and reverse rotation operation | movement. When the fan 16 performs a normal rotation operation, air flows from the radiator 11 side to the engine 3 side as indicated by a broken arrow 102. On the other hand, when the fan 16 performs the reverse rotation operation, air flows from the engine 3 side or the exhaust passage 5 side to the radiator 11 side as indicated by a solid arrow 103.

  The engine room heat exchanger 29 is provided in the engine room at a location where air flows during the forward rotation operation and the reverse rotation operation of the fan 16.

<Operation of oil supply system 1>
The operation of the oil supply system 1 according to the third embodiment will be described.

<During warm-up operation>
During the warm-up operation of the engine 3, the fan 16 performs a reverse rotation operation. As a result, as indicated by a solid line arrow 103, air flows from the engine 3 side or the exhaust passage 5 side through the engine room heat exchanger 29 to the radiator 11 side. This air is heated by the heat released from the engine 3 or the exhaust passage 5. Therefore, the engine room heat exchanger 29 exchanges heat between the heated air flowing in the engine room and the AT oil, and the AT oil is heated. As a result, the viscosity of the AT oil decreases. Therefore, the energy consumed by the oil pump 20 during the warm-up operation of the engine 3 is reduced, and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced.

<During normal operation>
During normal operation of the engine 3, the fan 16 performs forward rotation. As a result, as indicated by a broken line arrow 102, air flows from the outside of the vehicle through the radiator 11 and the engine room heat exchanger 29 to the engine 3 side. This air is heat-exchanged with the cooling water by the radiator 11, but has a temperature at which the AT oil can be sufficiently cooled. Therefore, heat exchange between the air introduced into the engine room from outside the vehicle and the AT oil is performed by the engine room heat exchanger 29, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  In the oil supply system 1 of the third embodiment described above, the engine room heat exchanger 29 is provided in a place where air flows in the forward rotation operation and the reverse rotation operation of the fan 16 in the engine room. As a result, the oil supply system 1 causes the fan 16 to reversely rotate during the warm-up operation of the engine 3, and uses the heat of the air heated by the engine 3 or the exhaust passage 5 to cause the AT oil to be discharged by the engine room heat exchanger 29. Can be heated.

  Further, the oil supply system 1 can cool the AT oil by the engine room heat exchanger 29 by using the air introduced from the outside of the vehicle by causing the fan 16 to rotate forward during normal operation of the engine 3.

  In the oil supply system 1 of the third embodiment, the water-cooled heat exchanger 23 described in the first and second embodiments may be connected in series with the engine room heat exchanger 29.

(Fourth embodiment)
A fourth embodiment will be described.

  As shown in FIG. 5, the oil supply system 1 of the fourth embodiment includes a bypass passage heat exchanger 22 described in the first and second embodiments, and an engine room heat exchanger 29 described in the third embodiment. It has. The bypass passage heat exchanger 22 and the engine room heat exchanger 29 are connected in series by a pipe 21.

<Operation of oil supply system 1>
The operation of the oil supply system 1 according to the fourth embodiment will be described.

<During warm-up operation>
During the warm-up operation of the engine 3, the switching valve 26 provided in the bypass passage 25 is opened, and the portion of the intake passage 4 closer to the engine 3 than the compressor 7 communicates with the bypass passage 25. Thereby, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 downstream of the compressor 7 to the bypass passage 25 flows. Therefore, the bypass passage heat exchanger 22 exchanges heat between the heated air flowing through the bypass passage 25 and the AT oil, thereby heating the AT oil.

  Further, during the warm-up operation of the engine 3, the fan 16 performs a reverse rotation operation. As a result, as indicated by a solid line arrow 103, air flows from the engine 3 side or the exhaust passage 5 side through the engine room heat exchanger 29 to the radiator 11 side. Therefore, the engine room heat exchanger 29 exchanges heat between the heated air flowing in the engine room and the AT oil, and the AT oil is heated. As a result, the viscosity of the AT oil decreases. Therefore, the energy consumed by the oil pump 20 during the warm-up operation of the engine 3 is reduced, and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced.

<During normal operation>
During normal operation of the engine 3, the switching valve 26 provided in the bypass passage 25 is closed, and the inflow of air from the intake passage 4 to the bypass passage 25 is blocked. Thereby, the temperature rise of the AT oil flowing through the bypass passage heat exchanger 22 is prevented.

  During normal operation of the engine 3, the fan 16 performs forward rotation. As a result, as indicated by a broken line arrow 102, air flows from the outside of the vehicle through the radiator 11 and the engine room heat exchanger 29 to the engine 3 side. Therefore, heat exchange between the air introduced into the engine room from outside the vehicle and the AT oil is performed by the engine room heat exchanger 29, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  In the oil supply system 1 of the fourth embodiment, the water-cooled heat exchanger 23 described in the first and second embodiments is connected in series with the bypass passage heat exchanger 22 and the engine room heat exchanger 29. May be.

(Fifth embodiment)
A fifth embodiment will be described.

  As shown in FIGS. 6 and 7, the oil supply system 1 according to the fifth embodiment includes the switching door 28 described in the second embodiment in the bypass passage 25 with respect to the configuration described in the fourth embodiment. .

<Operation of oil supply system 1>
The operation of the oil supply system 1 according to the fifth embodiment will be described.

<During warm-up operation>
As shown in FIG. 6, during the warm-up operation of the engine 3, the switching door 28 provided in the bypass passage 25 communicates the intake passage 4 and the bypass passage 25, and the space outside the opening 27 and the bypass passage 25. Block the air flow between them. As a result, as indicated by an arrow 100, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 downstream of the compressor 7 to the bypass passage 25 flows. Therefore, the bypass passage heat exchanger 22 exchanges heat between the heated air flowing through the bypass passage 25 and the AT oil, thereby heating the AT oil.

  Further, during the warm-up operation of the engine 3, the fan 16 performs a reverse rotation operation. As a result, as indicated by a solid line arrow 103, air flows from the engine 3 side or the exhaust passage 5 side through the engine room heat exchanger 29 to the radiator 11 side. Therefore, the engine room heat exchanger 29 exchanges heat between the heated air flowing in the engine room and the AT oil, and the AT oil is heated. As a result, the viscosity of the AT oil decreases. Therefore, the energy consumed by the oil pump 20 during the warm-up operation of the engine 3 is reduced, and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced.

<During normal operation>
As shown in FIG. 7, during normal operation of the engine 3, the switching door 28 provided in the bypass passage 25 blocks the inflow of air from the intake passage 4 to the bypass passage 25, and the space outside the opening 27. It communicates with the bypass passage 25. As a result, the outside air is introduced from the opening 27 into the bypass passage 25 as indicated by an arrow 101. Therefore, in the bypass passage heat exchanger 22, heat exchange between the outside air and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  Further, as shown in FIG. 7, during normal operation of the engine 3, the fan 16 performs forward rotation. As a result, as indicated by a broken line arrow 102, air flows from the outside of the vehicle through the radiator 11 and the engine room heat exchanger 29 to the engine 3 side. Therefore, heat exchange between the air introduced into the engine room from outside the vehicle and the AT oil is performed by the engine room heat exchanger 29, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  In the oil supply system 1 of the fifth embodiment, the water-cooled heat exchanger 23 described in the first and second embodiments is connected in series with the bypass passage heat exchanger 22 and the engine room heat exchanger 29. May be.

(Sixth embodiment)
A sixth embodiment will be described.

  As shown in FIGS. 8 and 9, the oil supply system 1 of the sixth embodiment does not include the water-cooled heat exchanger 23 compared to the configuration described in the second embodiment.

<Operation of oil supply system 1>
The operation of the oil supply system 1 according to the sixth embodiment will be described.

<During warm-up operation>
As shown in FIG. 8, during the warm-up operation of the engine 3, the switching door 28 provided in the bypass passage 25 communicates the intake passage 4 and the bypass passage 25, and the space outside the opening 27 and the bypass passage 25. Block the air flow between them. As a result, as indicated by an arrow 100, a part of the air compressed by the compressor 7 and heated from the portion of the intake passage 4 downstream of the compressor 7 to the bypass passage 25 flows. Therefore, the bypass passage heat exchanger 22 exchanges heat between the heated air flowing through the bypass passage 25 and the AT oil, thereby heating the AT oil.

<During normal operation>
As shown in FIG. 9, during normal operation of the engine 3, the switching door 28 provided in the bypass passage 25 blocks the inflow of air from the intake passage 4 to the bypass passage 25, and the space outside the opening 27. It communicates with the bypass passage 25. As a result, the outside air is introduced from the opening 27 into the bypass passage 25 as indicated by an arrow 101. Therefore, in the bypass passage heat exchanger 22, heat exchange between the outside air and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

(Seventh embodiment)
A seventh embodiment will be described.

  As shown in FIG. 10, the oil supply system 1 of the seventh embodiment includes a heat exchanger 30 provided in a portion of the intake passage 4 between the compressor 7 and the water-cooled intercooler 8. This heat exchanger 30 is referred to as an intake passage heat exchanger 30. In the intake passage 4, air compressed by the compressor 7 and heated is supplied to a portion where the intake passage heat exchanger 30 is provided. Therefore, it can be said that the portion of the intake passage 4 where the intake passage heat exchanger 30 is provided is a place where the temperature of the air rises during the warm-up operation of the engine 3 in the engine room. The intake passage heat exchanger 30 can exchange heat between the heated air flowing through the intake passage 4 and the AT oil.

  The oil supply system 1 according to the seventh embodiment includes an engine room heat exchanger 29 and a water-cooled heat exchanger 23 in addition to the intake passage heat exchanger 30. The intake passage heat exchanger 30, the engine room heat exchanger 29, and the water-cooled heat exchanger 23 are connected in series by a pipe 21.

<Operation of oil supply system 1>
The operation of the oil supply system 1 according to the seventh embodiment will be described.

<During warm-up operation>
During the warm-up operation of the engine 3, the thermostat 13 of the cooling device is closed in order to warm the engine body and engine oil early. Therefore, the cooling water does not circulate through the cooling device. Therefore, the water-cooled heat exchanger 23 hardly exchanges heat between the cooling water and the AT oil.

  During the warm-up operation of the engine 3, the fan 16 performs a reverse rotation operation. As a result, as indicated by a solid line arrow 103, air flows from the engine 3 side or the exhaust passage 5 side through the engine room heat exchanger 29 to the radiator 11 side. This air is heated by the heat released from the engine 3 or the exhaust passage 5. Therefore, the engine room heat exchanger 29 exchanges heat between the heated air flowing in the engine room and the AT oil, thereby heating the AT oil.

  During the warm-up operation of the engine 3, the air that has been compressed by the compressor 7 and heated in the portion of the intake passage 4 where the intake passage heat exchanger 30 is provided flows. Therefore, heat exchange between the heated air flowing through the intake passage 4 and the AT oil is performed by the intake passage heat exchanger 30 to heat the AT oil. As a result, the viscosity of the AT oil decreases. Therefore, the energy consumed by the oil pump 20 during the warm-up operation of the engine 3 is reduced, and the frictional resistance of the gear mechanism of the automatic transmission 2 is reduced.

<During normal operation>
During normal operation of the engine 3, the thermostat 13 of the cooling device is opened. Therefore, the cooling water circulates through the cooling device. Thereby, in the water-cooled heat exchanger 23, heat exchange between the cooling water and the AT oil is performed, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  During normal operation of the engine 3, the fan 16 performs forward rotation. As a result, as indicated by a broken line arrow 102, air flows from the outside of the vehicle through the radiator 11 and the engine room heat exchanger 29 to the engine 3 side. Therefore, heat exchange between the air introduced into the engine room from outside the vehicle and the AT oil is performed by the engine room heat exchanger 29, and the AT oil is cooled to a temperature suitable for use of the hydraulic mechanism.

  During normal operation of the engine 3, air that has been compressed by the compressor 7 and that has been heated flows through a portion of the intake passage 4 where the intake passage heat exchanger 30 is provided. This is the same as during warm-up operation. Therefore, heat exchange between the heated air flowing through the intake passage 4 and the AT oil is performed by the intake passage heat exchanger 30 to heat the AT oil. On the other hand, during normal operation of the engine 3, the AT oil is cooled by the water-cooled heat exchanger 23 and the engine room heat exchanger 29, so that the hydraulic mechanism is used even if heated by the intake passage heat exchanger 30. Therefore, the temperature will be maintained at an appropriate temperature.

  As described above, in the oil supply system 1 of the seventh embodiment, during normal operation of the engine 3, heat exchange between the heated air flowing through the intake passage 4 and the AT oil is performed by the intake passage heat exchanger 30. Is called. As a result, the high-temperature and high-pressure supercharged air that is compressed by the compressor 7 and flows through the intake passage 4 is cooled. Therefore, by increasing the air density of the supercharged air introduced into the engine 3, it is possible to increase the combustion efficiency of the engine 3 and improve fuel efficiency. Furthermore, according to this configuration, it is possible to cool the supercharged air flowing through the intake passage 4 by using both the intake passage heat exchanger 30 and the water-cooled intercooler 8, so that the water-cooled intercooler 8 The physique can be reduced in size.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

  For example, in the above embodiment, the one or more heat exchangers 22, 23, 29, 30 for cooling or heating the AT oil are installed in the piping on the upstream side of the hydraulic mechanism of the automatic transmission 2. Alternatively, it may be installed in a downstream pipe.

(Summary)
According to the first aspect shown in part or all of the above-described embodiments, the oil supply system heats or cools AT oil used in an automatic transmission connected to an engine, and includes an oil pump. , With piping and heat exchanger. The oil pump discharges AT oil pumped up from the oil pan to the pipe. The pipe supplies AT oil discharged from the oil pump to each part of the hydraulic mechanism of the automatic transmission, or discharges AT oil from each part of the hydraulic mechanism. The heat exchanger is provided in a place where air that has been heated during engine warm-up operation flows in the engine room, and performs heat exchange between the AT oil supplied through the piping and the heated air.

  According to a second aspect, the engine includes a supercharger that includes a turbine provided in the exhaust passage of the engine and a compressor that compresses air in the intake passage with the torque of the turbine and supplies the compressed air to the engine. The heat exchanger is provided in a passage through which the air compressed by the compressor flows as a place where the temperature of the air rises during the warm-up operation of the engine.

  According to this, the temperature of the air compressed by the compressor rises. The heat exchanger can heat the AT oil using the heat of the air.

  According to the third aspect, the oil supply system further includes a bypass passage and a switching valve. The bypass passage connects a portion of the intake passage closer to the engine than the compressor and a portion of the intake passage closer to the compressor than the engine. The switching valve switches a communication state and a blocking state between the intake passage and the bypass passage, or adjusts a flow passage cross-sectional area of the bypass passage. The heat exchanger is provided in the bypass passage as a place where the temperature of the air rises during the warm-up operation of the engine, and performs heat exchange between the air flowing through the bypass passage and the AT oil.

  According to this, this oil supply system can heat AT oil using the heat of the air flowing through the bypass passage when the engine is warming up.

  In addition, this oil supply system can prevent an increase in the temperature of the AT oil flowing through the heat exchanger by blocking the inflow of air from the intake passage to the bypass passage by the switching valve during normal operation of the engine. is there. Therefore, it is possible to prevent the AT oil from being deteriorated due to the temperature rise.

  According to the fourth aspect, the bypass passage has an opening through which outside air can be introduced. The switching valve switches a communication state and a blocking state between a portion of the intake passage closer to the engine than the compressor and the bypass passage, and switches a communication state and a blocking state between the opening and the bypass passage.

  According to this, during the normal operation of the engine, the oil supply system can shut off the air flow between the intake passage and the bypass passage by the switching valve, and can take outside air into the bypass passage from the opening. Thereby, the heat exchanger can cool AT oil with the air which flows through a bypass channel at the time of normal operation of an engine.

  According to the fifth aspect, in the oil supply system, the forward rotation operation for flowing air from the radiator side to the engine side for cooling the cooling water of the engine and the reverse flow for flowing air from the engine side or the exhaust passage side to the radiator side are performed. A fan that can be switched between rotating operation is further provided. The heat exchanger is provided in a place where air flows during the forward rotation operation and the reverse rotation operation of the fan in the engine room as a place where the air temperature rises during the warm-up operation of the engine.

  According to this, during the warm-up operation of the engine, this oil supply system causes air to flow from the engine side or the exhaust passage side to the radiator side by the reverse rotation operation of the fan, and the heat of the air heated by the engine or the exhaust passage Can be used to heat the AT oil.

  In addition, this oil supply system can cool AT oil using air introduced from the outside of the vehicle by normal rotation operation of the fan during normal operation of the engine.

  According to the sixth aspect, the bypass passage heat exchanger and the engine room heat exchanger are connected by piping.

  According to this, this oil supply system can heat AT oil by the bypass passage heat exchanger and the engine room heat exchanger during the warm-up operation of the engine.

  In addition, this oil supply system can cool the AT oil by the engine room heat exchanger using air introduced from outside the vehicle by the forward rotation operation of the fan during normal operation of the engine.

  According to the seventh aspect, the heat exchanger is provided in a portion of the intake passage between the compressor and the engine as a place where the temperature of the air rises during the warm-up operation of the engine. Heat exchange with AT oil is performed.

  According to this, the heat exchanger can heat the AT oil using the heat of the air compressed by the compressor and flowing through the intake passage.

  According to an eighth aspect, the oil supply system further includes a water-cooled heat exchanger capable of cooling AT oil supplied through the piping with engine coolant. The heat exchanger and the water-cooled heat exchanger are connected by piping.

  According to this, this oil supply system cools AT oil with a water-cooled heat exchanger during normal operation of the engine, and circulates AT oil in the heat exchanger to prevent deterioration of AT oil due to temperature rise. Can be prevented.

  According to the ninth aspect, the intake passage heat exchanger, the engine room heat exchanger, and the water-cooled heat exchanger are connected by piping.

  According to this, the oil supply system can heat the AT oil by the intake passage heat exchanger and the engine room heat exchanger during the warm-up operation of the engine.

  The oil supply system can cool the air that is compressed by the compressor and flows through the intake passage by the intake passage heat exchanger during normal operation of the engine. Thereby, while improving a fuel consumption, the intercooler attached accompanying the supercharger can be reduced in size.

  The AT oil heated by the heat exchange with the air flowing through the intake passage in the intake passage heat exchanger is cooled by the engine room heat exchanger and the water-cooled heat exchanger. Therefore, this oil supply system can cool the AT oil while cooling the air flowing through the intake passage during the normal operation of the engine.

Claims (3)

An oil supply system for heating or cooling AT oil used in an automatic transmission (2) connected to an engine (3),
The engine includes a turbine (6) provided in an exhaust passage (5) of the engine, and a compressor (7) that compresses air in an intake passage (4) by torque of the turbine and supplies the compressed air to the engine. With a supercharger,
An oil pump (20) for discharging AT oil pumped from the oil pan (24);
A pipe (21) for supplying AT oil discharged from the oil pump to a hydraulic mechanism of the automatic transmission or discharging AT oil from the hydraulic mechanism;
A heat exchanger that is provided in a place where air heated during engine warm-up operation flows in an engine room, and performs heat exchange between the AT oil supplied through the piping and the air heated;
A bypass passage (25) for connecting a portion of the intake passage closer to the engine than the compressor and a portion of the intake passage opposite to the engine with respect to the compressor;
A switching valve (26, 28) for switching between a communication state and a blocking state between the intake passage and the bypass passage, or adjusting a cross-sectional area of the bypass passage,
The hydraulic mechanism is operated by hydraulic pressure ,
Before Stories heat exchanger (22), as a place to air Atsushi Nobori during the warm-up operation of the engine, is provided in the bypass passage through which air compressed by the compressor, air and AT oil flowing through the bypass passage Oil supply system that exchanges heat with the oil. The bypass passage has an opening (27) through which outside air can be introduced,
The switching valve (28) switches between a communication state and a cutoff state of the bypass passage from a portion of the intake passage closer to the engine than the compressor, and a communication state and a cutoff state of the opening and the bypass passage. The oil supply system according to claim 1 , wherein the oil supply system is switched. An oil supply system for heating or cooling AT oil used in an automatic transmission (2) connected to an engine (3),
An oil pump (20) for discharging AT oil pumped from the oil pan (24);
A pipe (21) for supplying AT oil discharged from the oil pump to a hydraulic mechanism of the automatic transmission or discharging AT oil from the hydraulic mechanism;
A heat exchanger that is provided in a place where air heated during engine warm-up operation flows in an engine room, and that performs heat exchange between the AT oil supplied through the piping and the air heated;
The hydraulic mechanism is operated by hydraulic pressure,
The engine includes a turbine (6) provided in an exhaust passage (5) of the engine, and a compressor (7) that compresses air in an intake passage (4) by torque of the turbine and supplies the compressed air to the engine. With a supercharger,
The oil supply system includes:
A bypass passage that connects a portion of the intake passage closer to the engine than a position where the compressor is provided, and a portion of the intake passage that is opposite to the engine with respect to the compressor;
A switching valve that switches between a communication state and a blocking state between the intake passage and the bypass passage, or that adjusts a cross-sectional area of the bypass passage;
Switchable between forward rotation operation for flowing air from the radiator side to the engine side for cooling the cooling water of the engine and reverse rotation operation for flowing air from the engine side or the exhaust passage side of the engine to the radiator side With a fan
A plurality of the heat exchangers,
Among the plurality of heat exchangers, the heat exchanger provided in the bypass passage is referred to as a bypass passage heat exchanger (22), and among the plurality of heat exchangers, forward rotation operation and reverse rotation operation of the fan. When the heat exchanger provided in a place where air flows at this time is referred to as an engine room heat exchanger (29),
The bypass passage heat exchanger and the engine room heat exchanger are oil supply systems connected by the pipe.

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