Vehicle temperature control system and vehicle

Abstract

To provide a temperature control system for a vehicle which can improve fuel efficiency of the vehicle if cooling of a rotating electric machine is unnecessary while cooling the rotating electric machine if the cooling of the rotating electric machine is necessary.SOLUTION: A temperature control system 10 for a vehicle comprises a first temperature control circuit 61 in which a first temperature control medium TCM1 circulates to perform temperature control of an electric motor 20 and a speed change gear 40; a second temperature control circuit 62 in which a second temperature control medium TCM2 circulates; a heat exchanger 63 that performs heat exchange between the first temperature control medium TCM1 and the second temperature control medium TCM2; a valve device 626 that adjusts the flow of the second temperature control medium TCM2 flowing through the heat exchanger 63; and a control device ECU including a valve opening / closing control part 73 that controls opening and closing of the valve device 626. The valve opening / closing control part 73 controls the valve device 626 to close when the temperature of the first temperature control medium TCM1 is below a prescribed temperature Tset1, and controls the valve device 626 to open when the temperature of the first temperature control medium TCM1 is Tset1 or higher.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a vehicle temperature control system mounted on an electric vehicle or the like, and to the vehicle. [Background technology]

[0002] In recent years, efforts to realize a low-carbon or carbon-free society have become more active, and research and development into vehicle electrification technologies is being conducted to reduce CO2 emissions and improve energy efficiency in vehicles.

[0003] Generally, an electric vehicle includes a rotating electric machine and a power conversion device that controls the power supplied to the rotating electric machine. Because the rotating electric machine and the power conversion device generate heat when the electric vehicle is driven, many electric vehicles are equipped with a vehicle temperature control system that controls the temperature of the rotating electric machine and the power conversion device.

[0004] In vehicle electrification technology, there is a demand for more efficient cooling of rotating electrical machines and power conversion devices, while at the same time further improving the fuel efficiency of the vehicle. One method for improving vehicle fuel efficiency is to suppress an increase in friction loss in the rotating electrical machine and gearbox. For example, Patent Document 1 describes a vehicle temperature control system that controls a flow control valve based on the temperature of a first temperature control medium that controls the temperature of the rotating electrical machine and gearbox, and the temperature of a second temperature control medium that controls the temperature of the power conversion device, thereby suppressing an increase in friction loss in the rotating electrical machine and gearbox. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7314222 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the vehicle temperature control system of Patent Document 1, the valve device may open even when the temperature of the first temperature control medium is below a predetermined temperature, so there is room for further improvement to suppress an increase in friction loss in the gearbox. In particular, when the temperature of the first temperature control medium is below a predetermined temperature, cooling of the rotating electrical machine is unnecessary, so it is preferable to increase the temperature of the first temperature control medium as early as possible to reduce the viscosity of the first temperature control medium.

[0007] The present invention provides a vehicle temperature control system and a vehicle that can cool a rotating electric machine when cooling is required, while improving fuel economy of the vehicle when cooling of the rotating electric machine is not required. [Means for solving the problem]

[0008] A first aspect of the present invention is A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit provided with a first pump, through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit provided with a second pump, through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit is a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path; a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a vehicle speed detection unit that detects the vehicle speed; a gradient angle detection unit that detects a gradient angle of a road surface on which the vehicle is traveling; an uphill travel determination unit that determines whether the vehicle is traveling uphill based on the detection values ​​of the vehicle speed detection unit and the gradient angle detection unit, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open. death, Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the uphill traveling determination unit determines that the vehicle is traveling uphill, the flow rate adjustment valve is controlled to be opened. This is a vehicle temperature control system.

[0009] A second aspect of the present invention is A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit provided with a first pump, through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit provided with a second pump, through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit is a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path; a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a slip determination unit that determines whether or not at least one wheel of the vehicle is spinning, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open; Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, if the slip determination unit determines that at least one wheel of the vehicle is spinning, the flow rate adjustment valve is controlled to open. This is a vehicle temperature control system. Moreover, a third aspect of the present invention is A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit provided with a first pump, through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit provided with a second pump, through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit is a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path; a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a driving torque detection unit that detects the driving torque of the vehicle, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open; Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the driving torque detected by the driving torque detection unit is equal to or higher than a predetermined value, the flow rate adjustment valve is controlled to be opened. This is a vehicle temperature control system. [Effects of the Invention]

[0010] According to the present invention, when cooling of the rotating electric machine is required, the rotating electric machine is cooled by the first temperature control medium, and when cooling of the rotating electric machine is not required, the temperature of the first temperature control medium is increased, thereby improving the fuel efficiency of the vehicle. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram of a vehicle temperature control system according to an embodiment of the present invention; [Figure 2] 2 is a diagram showing the configuration of a valve device in the vehicle temperature control system of FIG. 1. [Figure 3] 2 is a block diagram of a control device in the vehicle temperature control system of FIG. 1. FIG. [Figure 4] 4 is a flowchart showing a control flow of the valve device in a valve opening / closing control unit in the control device of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of a vehicle equipped with a vehicle temperature control system of the present invention will be described with reference to the accompanying drawings. The drawings should be viewed in the direction indicated by the reference numerals.

[0013] (Overall configuration of vehicle temperature control system) 1, a vehicle temperature control system 10 of this embodiment is mounted on a vehicle V that is equipped with an internal combustion engine ICE, a control device ECU, an electric motor 20, a generator 30, a transmission 40, and a power conversion device 50. The vehicle temperature control system 10 includes the internal combustion engine ICE, the control device ECU, the electric motor 20, the generator 30, the transmission 40, the power conversion device 50, and a temperature control circuit 60.

[0014] The electric motor 20 is a rotating electric machine that outputs power to drive the vehicle V using electricity stored in a power storage device (not shown) mounted on the vehicle V or electricity generated by a generator 30. When braking the vehicle V, the electric motor 20 may generate electricity using the kinetic energy of the drive wheels of the vehicle V to charge the aforementioned power storage device.

[0015] The generator 30 is a rotating electric machine that generates electricity using the power of the internal combustion engine ICE. The generator 30 charges the above-mentioned power storage device or supplies electric power to the electric motor 20.

[0016] The transmission 40 is a device that reduces the speed of the power output from the electric motor 20 and transmits it to the drive wheels. The transmission 40 is, for example, a gear-type power transmission device.

[0017] The power conversion device 50 includes a PDU (Power Drive Unit) (not shown) that converts the power output from the aforementioned power storage device from DC to AC and controls the input / output power of the electric motor 20 and the generator 30, and a VCU (Voltage Control Unit) (not shown) that boosts the power output from the aforementioned power storage device as needed. When the electric motor 20 generates power during braking of the vehicle V, the VCU may lower the voltage of the power generated by the electric motor 20.

[0018] The temperature control circuit 60 includes a first temperature control circuit 61 through which a non-conductive first temperature control medium TCM1 circulates to control the temperatures of the electric motor 20, the generator 30, and the transmission 40, a second temperature control circuit 62 through which a conductive second temperature control medium TCM2 circulates to control the temperature of the power conversion device 50, and a heat exchanger 63 that exchanges heat between the first temperature control medium TCM1 and the second temperature control medium TCM2. The non-conductive first temperature control medium TCM1 is, for example, an oil called ATF (Automatic Transmission Fluid) that can lubricate and control the temperatures of the electric motor 20, the generator 30, and the transmission 40. The conductive second temperature control medium TCM2 is, for example, a coolant called LLC (Long Life Coolant).

[0019] (Configuration of the first temperature control circuit) The first temperature control circuit 61 is provided with a first pump 611 and a storage unit 612. The first pump 611 is a mechanical pump driven by the power of the internal combustion engine ICE and the rotational force of an axle (not shown) of the vehicle V. The storage unit 612 stores the first temperature control medium TCM1 circulating through the first temperature control circuit 61. The storage unit 612 is, for example, an oil pan provided at the bottom of a housing (not shown) that accommodates the electric motor 20, the generator 30, and the transmission 40.

[0020] The first temperature control circuit 61 is provided with a first pump 611 and has a pressure flow path 610a whose upstream end is connected to a storage unit 612. A branch unit 613 is provided at the downstream end of the pressure flow path 610a. The first temperature control circuit 61 is provided with a heat exchanger 63, an electric motor 20, and a generator 30, and has a first branch flow path 610b1 whose upstream end is connected to the branch unit 613 and whose downstream end is connected to the storage unit 612. In the first branch flow path 610b1, the heat exchanger 63 is disposed upstream of the electric motor 20 and the generator 30, and the electric motor 20 and the generator 30 are disposed in parallel. The first temperature control circuit 61 is provided with a transmission 40 and has a second branch flow path 610b2 whose upstream end is connected to the branch unit 613 and whose downstream end is connected to the storage unit 612.

[0021] Therefore, the first temperature control circuit 61 has a flow path in which the first temperature control medium TCM1 pumped from the first pump 611 in the pressure-feeding flow path 610a passes from the branching portion 613 through the first branching flow path 610b1, is cooled by heat exchange with the second temperature control medium TCM2 in the heat exchanger 63, is supplied to the electric motor 20 and the generator 30 to lubricate and temperature-control the electric motor 20 and the generator 30, and is then stored in the storage portion 612; The first temperature control medium TCM1 pumped from the first pump 611 passes through the branch section 613 and the second branch flow path 610b2, is supplied to the transmission 40, and lubricates and regulates the temperature of the transmission 40, and then is stored in the storage section 612. A parallel flow path is formed, and the first temperature control medium TCM1 stored in the storage section 612 flows through the pressure flow path 610a and is supplied to the first pump 611, and the first temperature control medium TCM1 circulates through the first temperature control circuit 61.

[0022] In this embodiment, the first branch flow path 610b1 and the second branch flow path 610b2 are formed so that the flow rate of the first temperature control medium TCM1 flowing through the first branch flow path 610b1 is greater than the flow rate of the first temperature control medium TCM1 flowing through the second branch flow path 610b2.

[0023] The first temperature control circuit 61 is provided with a first temperature sensor 61a that detects the temperature of the first temperature control medium TCM1 circulating through the first temperature control circuit 61. In this embodiment, the first temperature sensor 61a is provided in a storage unit 612 that is an oil pan, and detects the temperature of the first temperature control medium TCM1 stored in the storage unit 612. The first temperature sensor 61a outputs a detected value of the temperature of the first temperature control medium TCM1 stored in the storage unit 612 to the control device ECU.

[0024] The first temperature control circuit 61 further includes a pressure adjustment circuit 610c having an upstream end connected to the reservoir 612 and a downstream end connected to the pumping flow path 610a downstream of the first pump 611. The pressure adjustment circuit 610c is provided with a pressure adjustment valve 619. The pressure adjustment valve 619 may be a check valve or an electromagnetic valve such as a solenoid valve. When the liquid pressure of the first temperature adjustment medium TCM1 pumped from the first pump 611 reaches or exceeds a predetermined upper limit pressure, the pressure adjustment valve 619 opens, and a portion of the first temperature adjustment medium TCM1 pumped from the first pump 611 is returned to the reservoir 612. This maintains the liquid pressure of the first temperature adjustment medium TCM1 flowing through the first branch flow path 610b1 and the second branch flow path 610b2 at or below the upper limit pressure.

[0025] In the first temperature control circuit 61, the temperature of the first temperature control medium TCM1 stored in the storage section 612 after cooling the electric motor 20, the generator 30, and the transmission 40 is approximately 100°C. Therefore, the first temperature control medium TCM1 at approximately 100°C is supplied to the heat exchanger 63.

[0026] (Configuration of the second temperature control circuit) The second temperature control circuit 62 is provided with a second pump 621, a radiator 622, a storage tank 623, and a power conversion device 50. The second pump 621 is, for example, an electric pump driven by power stored in the aforementioned power storage device. A rotation speed sensor 621a is attached to the second pump 621 to detect the rotation speed of the second pump 621. The rotation speed sensor 621a outputs the detected value of the rotation speed of the second pump 621 to the control device ECU. The radiator 622 is disposed at the front of the vehicle V and is a heat dissipation device that exchanges heat between the second temperature control medium TCM2 and the outside air using wind generated when the vehicle V is traveling, thereby cooling the second temperature control medium TCM2. The storage tank 623 is a tank that temporarily stores the second temperature control medium TCM2 circulating through the second temperature control circuit 62. Even if cavitation occurs in the second temperature control medium TCM2 circulating through the second temperature control circuit 62, the second temperature control medium TCM2 circulating through the second temperature control circuit 62 is temporarily stored in the storage tank 623, thereby eliminating the cavitation that occurred in the second temperature control medium TCM2.

[0027] The second temperature control circuit 62 has a pumping flow path 620a in which a storage tank 623, a second pump 621, and a radiator 622 are provided in this order from upstream to downstream. A junction 625 is provided at the upstream end of the pumping flow path 620a, and a branch 624 is provided at the downstream end of the pumping flow path 620a. Therefore, the second temperature control medium TCM2 that flows from the junction 625 into the pumping flow path 620a is temporarily stored in the storage tank 623, then pumped by the second pump 621 and supplied to the radiator 622, where it exchanges heat with the outside air to be cooled, and then flows to the branch 624.

[0028] The second temperature control circuit 62 further includes a first branch flow path 620b1, which is provided with the power converter 50 and has an upstream end connected to the branch section 624, passes through the power converter 50, and has a downstream end connected to the junction 625. Also included is a second branch flow path 620b2, which is provided with a heat exchanger 63 and has an upstream end connected to the branch section 624, passes through the heat exchanger 63, and has a downstream end connected to the junction 625. In this embodiment, a valve device 626 is provided in the second branch flow path 620b2 upstream of the heat exchanger 63. In this embodiment, the valve device 626 is a solenoid valve that switches the second branch flow path 620b2 between a fully open state and a fully closed state. The valve device 626 is controlled by the control device ECU. The detailed configuration of the valve device 626 will be described later.

[0029] Therefore, the second temperature control medium TCM2, which is pumped through the pumping passage 620a by the second pump 621 and cooled by the radiator 622, branches into a first branch passage 620b1 and a second branch passage 620b2 at the branching point 624. The second temperature control medium TCM2 flowing through the first branch passage 620b1 cools the power converter 50 and merges with the second branch passage 620b2 and the pumping passage 620a at the merging point 625. The second temperature control medium TCM2 flowing through the second branch passage 620b2 cools the first temperature control medium TCM1 by exchanging heat with the first temperature control medium TCM1 in the heat exchanger 63 and merges with the first branch passage 620b1 and the pumping passage 620a at the merging point 625. The second temperature control medium TCM2 that has flowed through the first branch flow path 620b1 and the second temperature control medium TCM2 that has flowed through the second branch flow path 620b2 join at the junction 625, flow through the pumping flow path 620a, and are temporarily stored in the storage tank 623. The second temperature control medium TCM2 stored in the storage tank 623 is then supplied again to the second pump 621 through the pumping flow path 620a, and the second temperature control medium TCM2 circulates through the second temperature control circuit 62.

[0030] In this embodiment, the first branch flow path 620b1 and the second branch flow path 620b2 are formed so that the flow rate of the second temperature control medium TCM2 flowing through the first branch flow path 620b1 is greater than the flow rate of the second temperature control medium TCM2 flowing through the second branch flow path 620b2.

[0031] The second temperature control circuit 62 is provided with a second temperature sensor 62a that detects the temperature of the second temperature control medium TCM2 circulating through the second temperature control circuit 62. In this embodiment, the second temperature sensor 62a is provided in the pressure feed flow path 620a between the radiator 622 and the branching portion 624, and detects the temperature of the second temperature control medium TCM2 discharged from the radiator 622. The second temperature sensor 62a outputs a detected value of the temperature of the second temperature control medium TCM2 discharged from the radiator 622 to the control device ECU.

[0032] In the second temperature control circuit 62, the temperature of the second temperature control medium TCM2 cooled by the radiator 622 is approximately 40°C. The second temperature control medium TCM2 supplied to the heat exchanger 63 does not pass through the power conversion device 50, which is the temperature-controlled device, and therefore the second temperature control medium TCM2 at approximately 40°C is supplied to the heat exchanger 63.

[0033] (Heat exchanger configuration) The heat exchanger 63 exchanges heat between the first temperature control medium TCM1 of approximately 100°C and the second temperature control medium TCM2 of approximately 40°C, both of which are supplied to the heat exchanger 63. The first temperature control medium TCM1 of approximately 80°C is discharged from the heat exchanger 63 downstream of the first branch flow path 610b1 of the first temperature control circuit 61, and the second temperature control medium TCM2 of approximately 70°C is discharged downstream of the second branch flow path 620b2 of the second temperature control circuit 62.

[0034] In this way, the first temperature control medium TCM1 is cooled by the heat exchanger 63, and therefore the temperature control circuit 60 can cool the first temperature control medium TCM1 without providing a radiator for cooling the first temperature control medium TCM1. Therefore, the temperature control circuit 60 can cool the first temperature control medium TCM1 flowing through the first temperature control circuit 61 and the second temperature control medium TCM2 flowing through the second temperature control circuit 62 with a single radiator 622, and therefore the temperature control circuit 60 can be made smaller.

[0035] (Valve device configuration) Next, the configuration of the valve device 626 will be described with reference to FIG.

[0036] As shown in Figure 2, the valve device 626 includes an inlet portion 626a through which the second temperature control medium TCM2 flows in, an outlet portion 626b through which the second temperature control medium TCM2 is discharged, an in-valve flow path 626c extending from the inlet portion 626a to the outlet portion 626b, a valve body member 626d provided in the in-valve flow path 626c for opening and closing the in-valve flow path 626c, a biasing member 626e for biasing the valve body member 626d, and a solenoid portion (not shown) capable of generating electromagnetic force.

[0037] In this embodiment, the intra-valve flow path 626c extends substantially linearly, and the valve element 626d is provided near the inlet 626a. The valve element 626d is provided to slide along the inner wall surface 626c1 of the intra-valve flow path 626c. The valve element 626d has a shape that can close the inlet 626a. In this embodiment, the valve element 626d is disk-shaped. The valve element 626d is attracted by an electromagnetic force generated by a solenoid unit (not shown). The biasing member 626e is an elastic member such as a coil spring. One end of the biasing member 626e is connected to the end of the intra-valve flow path 626c on the inlet 626a side, and the other end of the biasing member 626e is connected to the valve element 626d. The biasing member 626e biases the valve element 626d in a direction away from the inlet 626a.

[0038] A locking portion 626f is formed in the in-valve flow path 626c, closer to the outlet 626b than the valve element member 626d. The locking portion 626f is, for example, a protrusion that protrudes toward the center of the in-valve flow path 626c. The locking portion 626f can lock the valve element member 626d, which slides along the inner wall surface 626c1 of the in-valve flow path 626c.

[0039] 2(a), when a solenoid (not shown) is in an off state and not generating an electromagnetic force, the valve device 626 is in a fully open state. At this time, the valve body member 626d is biased in a direction away from the inlet portion 626a by the biasing force of the biasing member 626e, and is in a state of being locked by the locking portion 626f.

[0040] 2(b), when a solenoid unit (not shown) is in an on state and generates an electromagnetic force, the valve device 626 is in a fully closed state. At this time, the valve body member 626d is attracted toward the inlet portion 626a by the electromagnetic force generated by the solenoid unit (not shown), and moves toward the inlet portion 626a against the biasing force of the biasing member 626e, thereby closing the inlet portion 626a.

[0041] Then, when the solenoid unit (not shown) is turned off again to transition the valve device 626 to the fully open state, the valve element member 626d is moved in a direction away from the inlet portion 626a by the resultant force of the fluid pressure of the second temperature control medium TCM2 at the inlet portion 626a and the biasing force of the biasing member 626e. At this time, if the fluid pressure of the second temperature control medium TCM2 from the outlet portion 626b toward the valve element member 626d is not greater than the resultant force of the fluid pressure of the second temperature control medium TCM2 at the inlet portion 626a and the biasing force of the biasing member 626e, the valve device 626 can be transitioned to the fully open state. When the valve device 626 is in a fully closed state, the pressure on the upstream side of the valve device 626, i.e., the inlet 626a side, is high, and the pressure on the downstream side of the valve device 626, i.e., the outlet 626b side, is low, so that the fluid pressure of the second temperature control medium TCM2 flowing from the outlet 626b side toward the valve body member 626d is unlikely to become greater than the resultant force of the fluid pressure of the second temperature control medium TCM2 at the inlet 626a and the biasing force of the biasing member 626e.

[0042] In this way, valve device 626 is formed so that, when fully closed, valve body member 626d moves toward inlet portion 626a to close inlet portion 626a, thereby preventing valve device 626 from becoming stuck in the fully closed state. Furthermore, the biasing force of biasing member 626e required to transition valve device 626 from the fully closed state to the fully open state can be reduced, thereby reducing the cost of biasing member 626e and the cost of valve device 626.

[0043] (Control device configuration) The control device ECU controls the internal combustion engine ICE, the power conversion device 50, the second pump 621, and the valve device 626. The control device ECU may detect a failure of the heat exchanger 63 based on a detected value of the rotational speed of the second pump 621 output from the rotational speed sensor 621a. For example, the control device ECU may detect a failure of the heat exchanger 63 by determining that the heat exchanger 63 has failed when the fluctuation range of the detected value of the rotational speed of the second pump 621 output from the rotational speed sensor 621a with respect to the target rotational speed is equal to or greater than a predetermined value.

[0044] As shown in Figure 3, the control device ECU has a first temperature control medium temperature detection unit 71 that detects the temperature of the first temperature control medium TCM1 based on a signal from the first temperature sensor 61a, a second temperature control medium temperature detection unit 72 that detects the temperature of the second temperature control medium TCM2 based on a signal from the second temperature sensor 62a, a valve opening / closing control unit 73 that controls the opening and closing of the valve device 626, a vehicle speed detection unit 74 that detects the speed of the vehicle V, a gradient angle detection unit 75 that detects the gradient angle of the road surface on which the vehicle V is traveling, an uphill driving determination unit 76 that determines whether the vehicle V is traveling uphill based on the detection values ​​of the vehicle speed detection unit 74 and the gradient angle detection unit 75, a slip determination unit 77 that determines whether at least one wheel of the vehicle V is spinning, and a drive torque detection unit 78 that detects the drive torque of the vehicle V.

[0045] (Control flow of the valve device in the valve opening / closing control unit of the control device) Next, a control flow of the valve device 626 in the valve opening / closing control section 73 in the control device ECU will be described with reference to FIG.

[0046] The control flow of the valve device 626 in the valve opening / closing control unit 73 starts when the vehicle V switches from a power-off state to a power-on state. The power-on state of the vehicle V refers to a state in which the power supply system of the vehicle V is turned on, at least one of the internal combustion engine ICE and the electric motor 20, which are the drive sources of the vehicle V, is running, and the power necessary to drive the vehicle V is supplied to the accessories necessary for the vehicle V to run, and refers to a state in which the vehicle V is running or a state in which the vehicle V can run immediately. The power supply system is turned on by, for example, turning on a power switch (not shown) provided on the vehicle V by the operator of the vehicle V. The power supply system may also be turned on by turning on an ignition switch for starting the internal combustion engine ICE by the operator of the vehicle V.

[0047] First, when the vehicle V switches from a power-off state to a power-on state, the valve opening / closing control unit 73 controls the valve device 626 to close (step S101). Then, the process proceeds to step S102.

[0048] In step S102, the valve opening / closing control unit 73 determines whether the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than a predetermined temperature Tset1 [°C]. The predetermined temperature Tset1 is, for example, 80 [°C].

[0049] If, in step S102, the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the predetermined temperature Tset1 [°C] (step S102: YES), the valve opening / closing control unit 73 proceeds to step S202.

[0050] In step S102, if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is not below the predetermined temperature Tset1 [°C], that is, if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is higher than the predetermined temperature Tset1 [°C] (step S102: NO), the valve opening / closing control unit 73 proceeds to step S103.

[0051] In step S103, the valve opening / closing control unit 73 determines whether or not the uphill traveling determination unit 76 has determined that the vehicle V is traveling uphill.

[0052] The uphill traveling determination unit 76 stores, for example, a table in which threshold gradient angles are set corresponding to various vehicle speeds of the vehicle V. As an example, the threshold gradient angle is 10° when the vehicle speed of the vehicle V is 10 km / h, the threshold gradient angle is 6° when the vehicle speed of the vehicle V is 80 km / h, and the threshold gradient angle is 4° when the vehicle speed of the vehicle V is 120 km / h.

[0053] The uphill travel determination unit 76 determines whether the vehicle V is traveling uphill based on the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74 and the gradient angle of the road surface on which the vehicle V is traveling, detected by the gradient angle detection unit 75. As an example, by referring to the above-mentioned table in which threshold gradient angles are set corresponding to each vehicle speed of the vehicle V, the unit 76 determines that the vehicle V is traveling uphill if the gradient angle of the road surface on which the vehicle V is traveling, detected by the gradient angle detection unit 75, is equal to or greater than the threshold gradient angle corresponding to the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74, and determines that the vehicle V is not traveling uphill if the gradient angle is less than the threshold gradient angle corresponding to the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74.

[0054] If, in step S103, the uphill driving determination unit 76 determines that the vehicle V is driving uphill (step S103: YES), the valve opening / closing control unit 73 proceeds to step S201, controls the valve device 626 to open, and then proceeds to step S202.

[0055] If the uphill traveling determination unit 76 determines in step S103 that the vehicle V is not traveling uphill (step S103: NO), the valve opening / closing control unit 73 proceeds to step S104.

[0056] In step S104, the valve opening / closing control unit 73 determines whether or not the slip determination unit 77 has determined that at least one wheel of the vehicle V is spinning.

[0057] For example, the vehicle V has front, rear, left and right wheels, and a wheel speed sensor that detects the rotational speed of the wheel is provided on each wheel. Based on the detection signal output from the wheel speed sensor provided on each wheel, the slip determination unit 77 determines that one of the left or right front wheels is spinning if the wheel speed difference between the left and right front wheels is equal to or greater than a predetermined value, and determines that one of the left or right rear wheels is spinning if the wheel speed difference between the left and right rear wheels is equal to or greater than a predetermined value.

[0058] If the slip determination unit 77 determines in step S104 that at least one wheel of the vehicle V is spinning (step S104: YES), the valve opening / closing control unit 73 proceeds to step S201, controls the valve device 626 to open, and proceeds to step S202.

[0059] If the slip determination unit 77 determines in step S104 that the wheels of the vehicle V are not spinning (step S104: NO), the valve opening / closing control unit 73 proceeds to step S105.

[0060] In step S105, the valve opening / closing control unit 73 determines whether the drive torque of the vehicle V detected by the drive torque detection unit 78 is equal to or greater than a predetermined value Nset1 [N·m]. The predetermined value Nset1 [N·m] is, for example, a value equal to or greater than the maximum torque required when the vehicle V travels by itself without towing a towed vehicle such as a trailer or another vehicle such as a broken-down vehicle, and is the value of the drive torque required when traveling while towing a towed vehicle or another vehicle. The predetermined value Nset1 [N·m] is, for example, 4000 [N·m].

[0061] For example, the vehicle V is provided with a torque sensor that detects the torsion angle of the drive shaft of the vehicle V, and the drive torque detection unit 78 detects the drive torque of the vehicle V based on a detection signal corresponding to the torsion angle of the drive shaft output from this torque sensor.

[0062] If, in step S105, the driving torque of the vehicle V detected by the driving torque detection unit 78 is equal to or greater than the predetermined value Nset1 [N·m] (step S105: YES), the valve opening / closing control unit 73 proceeds to step S201, controls the valve device 626 to open, and then proceeds to step S202.

[0063] If, in step S105, the driving torque of the vehicle V detected by the driving torque detection unit 78 is not greater than the predetermined value Nset1 [N·m], that is, if the driving torque of the vehicle V detected by the driving torque detection unit 78 is less than the predetermined value Nset1 [N·m] (step S105: NO), the valve opening / closing control unit 73 continues to control the valve device 626 to close and proceeds to step S202.

[0064] In step S202, the valve opening / closing control unit 73 determines whether the vehicle V has switched from a power-on state to a power-off state.

[0065] If the vehicle V has switched from a power-on state to a power-off state in step S202 (step S202: YES), the valve opening / closing control unit 73 ends the series of controls.

[0066] If the vehicle V remains in the power-on state and has not been switched to the power-off state in step S202 (step S202: NO), the valve opening / closing control unit 73 returns to step S102.

[0067] In this way, the valve opening / closing control unit 73 controls the valve device 626 to close when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is below the predetermined temperature Tset1 [°C] regardless of the temperature of the second temperature control medium TCM2, and controls the valve device 626 to open when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 becomes equal to or higher than the predetermined temperature Tset1 [°C] while the valve device 626 is closed.

[0068] Generally, the higher the temperature of the first temperature control medium TCM1, the lower the viscosity. Therefore, when the first temperature control medium TCM1 is used in the first temperature control circuit 61 to lubricate and control the temperature of the electric motor 20, the generator 30, and the transmission 40, the higher the temperature of the first temperature control medium TCM1, the lower the friction loss.

[0069] In this embodiment, when the temperature of the first temperature control medium TCM1 is lower than the predetermined temperature Tset1 [°C], the electric motor 20 and the generator 30 are not at a high temperature and do not require cooling. On the other hand, the valve device 626 is closed, and the second temperature control medium TCM2 cooled by the radiator 622 is not supplied to the heat exchanger 63. Therefore, the first temperature control medium TCM1 is not cooled by the heat exchanger 63, and the temperature of the first temperature control medium TCM1 increases due to the heat generated by the electric motor 20 and the generator 30, reducing the viscosity of the first temperature control medium TCM1. This reduces friction loss and improves the fuel efficiency of the vehicle V. Then, when the temperature of the first temperature control medium TCM1 reaches or exceeds a predetermined temperature Tset1 [°C], the valve device 626 opens and the second temperature control medium TCM2 cooled by the radiator 622 is supplied to the heat exchanger 63, where the first temperature control medium TCM1 is cooled by heat exchange with the second temperature control medium TCM2, and the electric motor 20 and the generator 30 are cooled by the first temperature control medium TCM1.

[0070] As a result, when cooling of the electric motor 20 and the generator 30 is not required, the valve device 626 can be closed to reduce the viscosity of the first temperature control medium TCM1, thereby reducing friction loss and improving the fuel efficiency of the vehicle V. On the other hand, when cooling of the electric motor 20 and the generator 30 is required, the valve device 626 can be opened to cool the first temperature control medium TCM1 and thereby cool the electric motor 20 and the generator 30.

[0071] In this way, when cooling of the electric motor 20 and the generator 30 is required, the electric motor 20 and the generator 30 are cooled by the first temperature control medium TCM1, and when cooling of the electric motor 20 and the generator 30 is not required, the temperature of the first temperature control medium TCM1 is raised, thereby improving the fuel efficiency of the vehicle V.

[0072] Furthermore, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is below the predetermined temperature Tset1 [°C], if the uphill driving determination unit 76 determines that the vehicle V is driving uphill, the valve opening / closing control unit 73 controls the valve device 626 to open.Therefore, when the vehicle V is driving in a manner that makes the electric motor 20 and the generator 30 more likely to generate heat than during normal driving, the electric motor 20 and the generator 30 can be quickly cooled.

[0073] Furthermore, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is below the predetermined temperature Tset1 [°C], if the slip determination unit 77 determines that at least one wheel of the vehicle V is spinning, the valve opening / closing control unit 73 controls the valve device 626 to open. Therefore, when the vehicle V is traveling in a manner that makes the electric motor 20 and the generator 30 more likely to generate heat than during normal traveling, the electric motor 20 and the generator 30 can be quickly cooled.

[0074] Furthermore, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is below the predetermined temperature Tset1 [°C], if the driving torque detected by the driving torque detection unit 78 is equal to or greater than the predetermined value Nset1 [N·m], the valve opening / closing control unit 73 controls the valve device 626 to open. Therefore, when the vehicle V is towing or performing other driving that makes the electric motor 20 and the generator 30 more likely to generate heat than during normal driving, the electric motor 20 and the generator 30 can be quickly cooled.

[0075] In addition, in this embodiment, in the control flow of the valve device 626 in the valve opening / closing control unit 73, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than a predetermined temperature Tset1 [°C], the uphill driving determination unit 76 determines whether or not the vehicle V is driving uphill, the slip determination unit 77 determines whether or not at least one wheel of the vehicle V is spinning, and the driving torque detection unit 78 determines whether or not the driving torque detected is equal to or greater than a predetermined value Nset1 [N·m].

[0076] As a result, the driving state of the vehicle V is determined in order of the driving state in which the electric motor 20 and the generator 30 are more likely to generate heat, so that when the driving state of the vehicle V is a driving state in which the electric motor 20 and the generator 30 are more likely to generate heat, the electric motor 20 and the generator 30 can be cooled more quickly.

[0077] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above embodiment may be combined in any manner without departing from the spirit of the invention.

[0078] For example, in this embodiment, the vehicle V is equipped with an internal combustion engine ICE, but it may be an electric vehicle that does not have an internal combustion engine ICE. Also, in this embodiment, the vehicle V is equipped with a generator 30, but it may be a vehicle that does not have a generator 30.

[0079] This specification describes at least the following: In parentheses, components corresponding to those in the above-described embodiments are shown as examples, but the present invention is not limited to these.

[0080] (1) A vehicle temperature control system (vehicle temperature control system 10) mounted on a vehicle (vehicle V) including a rotating electric machine (electric motor 20), a transmission (transmission 40), and a power conversion device (power conversion device 50) that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit (first temperature control circuit 61) that is provided with a first pump (first pump 611) and through which a first temperature control medium (first temperature control medium TCM1) circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit (second temperature control circuit 62) that is provided with a second pump (second pump 621) and circulates a second temperature control medium (second temperature control medium TCM2) to control the temperature of the power conversion device; a heat exchanger (heat exchanger 63) that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate control valve (valve device 626) that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device (control device ECU) that controls the flow rate adjustment valve; The second temperature control circuit is a pressure-feeding flow path (pressure-feeding flow path 620a) provided with the second pump, with a branching portion (branching portion 624) at one end and a merging portion (merging portion 625) at the other end; a first branch flow path (first branch flow path 620b1) provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path (second branch flow path 620b2) provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path; a radiator (radiator 622) that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding flow path; The control device a first temperature control medium temperature detection unit (first temperature control medium temperature detection unit 71) that detects the temperature of the first temperature control medium; a valve opening / closing control unit (valve opening / closing control unit 73) that controls the opening and closing of the flow rate adjustment valve, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature (predetermined temperature Tset1), the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open. Vehicle temperature control system.

[0081] According to (1), when cooling of the rotating electric machine is required, the rotating electric machine is cooled by the first temperature control medium, and when cooling of the rotating electric machine is not required, the temperature of the first temperature control medium is increased, thereby improving the fuel efficiency of the vehicle.

[0082] (2) The vehicle temperature control system according to (1), The control device a vehicle speed detection unit (vehicle speed detection unit 74) that detects the vehicle speed; a gradient angle detection unit (gradient angle detection unit 75) that detects the gradient angle of the road surface on which the vehicle is traveling; an uphill travel determination unit (uphill travel determination unit 76) that determines whether the vehicle is traveling uphill based on the detection values ​​of the vehicle speed detection unit and the gradient angle detection unit, The valve opening / closing control unit Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the uphill traveling determination unit determines that the vehicle is traveling uphill, the flow rate adjustment valve is controlled to be opened. Vehicle temperature control system.

[0083] According to (2), even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is below a predetermined temperature, the rotating electric machine can be quickly cooled when the vehicle is traveling in a manner that makes the rotating electric machine more likely to generate heat than during normal traveling.

[0084] (3) The vehicle temperature control system according to (1), The control device The vehicle further includes a slip determination unit (slip determination unit 77) that determines whether or not at least one wheel of the vehicle is spinning, The valve opening / closing control unit Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, if the slip determination unit determines that at least one wheel of the vehicle is spinning, the flow rate adjustment valve is controlled to open. Vehicle temperature control system.

[0085] According to (3), even if the temperature of the first temperature-controlling medium detected by the first temperature-controlling medium temperature detection unit is below a predetermined temperature, the rotating electric machine can be quickly cooled when the vehicle is traveling in a manner that makes the rotating electric machine more likely to generate heat than during normal traveling.

[0086] (4) The vehicle temperature control system according to (1), The control device Further, a driving torque detection unit (driving torque detection unit 78) is provided to detect the driving torque of the vehicle. The valve opening / closing control unit Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the driving torque detected by the driving torque detection unit is equal to or higher than a predetermined value, the flow rate adjustment valve is controlled to be opened. Vehicle temperature control system.

[0087] According to (4), even if the temperature of the first temperature-control medium detected by the first temperature-control medium temperature detection unit is below a predetermined temperature, the rotating electric machine can be quickly cooled when the vehicle is performing towing or other driving, which makes the rotating electric machine more likely to generate heat than during normal driving.

[0088] (5) A vehicle (vehicle V) including a rotating electric machine (electric motor 20), a transmission (transmission 40), a power conversion device (power conversion device 50) that controls power supplied to the rotating electric machine, and a vehicle temperature control system (vehicle temperature control system 10), The vehicle temperature control system includes: a first temperature control circuit (first temperature control circuit 61) that is provided with a first pump (first pump 611) and through which a first temperature control medium (first temperature control medium TCM1) circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit (second temperature control circuit 62) that is provided with a second pump (second pump 621) and circulates a second temperature control medium (second temperature control medium TCM2) to control the temperature of the power conversion device; a heat exchanger (heat exchanger 63) that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate control valve (valve device 626) that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device (control device ECU) that controls the flow rate adjustment valve; The second temperature control circuit is a pressure-feeding flow path (pressure-feeding flow path 620a) provided with the second pump, with a branching portion (branching portion 624) at one end and a merging portion (merging portion 625) at the other end; a first branch flow path (first branch flow path 620b1) provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path (second branch flow path 620b2) provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path; a radiator (radiator 622) that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding flow path; The control device a first temperature control medium temperature detection unit (first temperature control medium temperature detection unit 71) that detects the temperature of the first temperature control medium; a valve opening / closing control unit (valve opening / closing control unit 73) that controls the opening and closing of the flow rate adjustment valve, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature (predetermined temperature Tset1), the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open. vehicle.

[0089] According to (5), when cooling of the rotating electric machine is required, the rotating electric machine is cooled by the first temperature control medium, and when cooling of the rotating electric machine is not required, the temperature of the first temperature control medium is increased, thereby improving the fuel efficiency of the vehicle. [Explanation of symbols]

[0090] 10 Vehicle temperature control system 20 Electric motor (rotating electric machine) 40 Transmission 50 Power conversion device 61 1st temperature control circuit 611 First Pump 62 2nd temperature control circuit 620a Pressure flow path 620b1 First branch flow path 620b2 Second branch flow path 621 Second Pump 622 Radiator 624 Branch 625 Junction 626 Valve equipment (flow control valve) 63 Heat exchanger 71 First temperature control medium temperature detection unit 73 Valve opening / closing control section 74 Vehicle speed detection unit 75 Gradient angle detector 76 Climbing Determination Unit 77 Slip Judgment Section 78 Drive torque detector ECU control unit TCM1 1st temperature control medium TCM2 Second temperature control medium Tset1 Predetermined temperature V vehicle

Claims

1. A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit including a first pump and through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit including a second pump and through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path, a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a vehicle speed detection unit that detects the vehicle speed; a gradient angle detection unit that detects a gradient angle of a road surface on which the vehicle is traveling; an uphill travel determination unit that determines whether the vehicle is traveling uphill based on the detection values ​​of the vehicle speed detection unit and the gradient angle detection unit, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open; Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the uphill travel determination unit determines that the vehicle is traveling uphill, the flow rate adjustment valve is controlled to be opened. Vehicle temperature control system.

2. A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit including a first pump and through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit including a second pump and through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path, a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a slip determination unit that determines whether or not at least one wheel of the vehicle is spinning; The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open; Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, if the slip determination unit determines that at least one wheel of the vehicle is spinning, the flow rate adjustment valve is controlled to open. Vehicle temperature control system.

3. A vehicle temperature control system mounted on a vehicle including a rotating electric machine, a transmission, and a power conversion device that controls power supplied to the rotating electric machine, The vehicle temperature control system includes: a first temperature control circuit including a first pump and through which a first temperature control medium circulates to control the temperatures of the rotating electric machine and the transmission; a second temperature control circuit including a second pump and through which a second temperature control medium circulates to control the temperature of the power conversion device; a heat exchanger that exchanges heat between the first temperature control medium and the second temperature control medium; a flow rate adjustment valve that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; a control device for controlling the flow rate adjustment valve; The second temperature control circuit a pressure-feeding flow path provided with the second pump, the pressure-feeding flow path having a branching portion at one end and a merging portion at the other end; a first branch flow path provided with the power converter, one end of which is connected to the branch portion and the other end of which is connected to the junction portion; a second branch flow path provided with the heat exchanger and the flow rate adjustment valve, one end of which is connected to the branch portion and the other end of which is connected to the junction portion, and which is formed in parallel with the first branch flow path, a radiator that performs heat exchange between the second temperature control medium and outside air is provided in the pressure-feeding passage; The control device a first temperature control medium temperature detection unit that detects the temperature of the first temperature control medium; a valve opening / closing control unit that controls the opening and closing of the flow rate adjustment valve; a driving torque detection unit that detects the driving torque of the vehicle, The valve opening / closing control unit When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the flow rate adjustment valve is controlled to be closed; When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit becomes equal to or higher than the predetermined temperature while the flow rate control valve is closed, the flow rate control valve is controlled to open; Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, when the driving torque detected by the driving torque detection unit is equal to or higher than a predetermined value, the flow rate adjustment valve is controlled to be opened. Vehicle temperature control system.

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