JP7431504B2 - Vehicle control device and vehicle control method - Google Patents

Description

The present invention relates to vehicle control.

Patent Document 1 describes a technique for lowering the rotation speed by regulating a transmission target input rotation speed and suppressing an increase in the oil temperature of the transmission.

JP2008-215237A

There is an appropriate oil temperature for the hydraulic oil in the transmission. Therefore, when the oil temperature is low, it is preferable to bring the temperature of the hydraulic oil close to the appropriate oil temperature as quickly as possible. Furthermore, there is an appropriate liquid temperature for the coolant of the drive source. For this reason, when the liquid temperature is low, it is preferable to bring the temperature of the cooling liquid close to the appropriate liquid temperature as quickly as possible.

The present invention has been made in view of such problems, and an object of the present invention is to quickly bring at least one of oil temperature and liquid temperature close to an appropriate temperature.

A vehicle control device according to an aspect of the present invention includes a drive source, a transmission having a mechanical oil pump and an electric oil pump driven by the drive source, and a cooling fluid for the drive source and a hydraulic oil for the transmission. a heat exchanger that performs heat exchange, the control device for a vehicle includes a heat exchanger that performs heat exchange of a control unit that executes control to increase the flow rate of the supplied hydraulic oil, and the control unit prohibits the control when the temperature of the hydraulic oil is equal to or higher than a predetermined oil temperature; If the operating time of is less than a predetermined time, the temperature of the hydraulic oil is below the predetermined oil temperature, and the temperature increase rate of the hydraulic oil is above a predetermined rate, the control continues to be executed.

According to another aspect of the present invention, there is provided a vehicle control method corresponding to the vehicle control device described above. According to still another aspect of the present invention, the invention includes a drive source, a transmission having an electric oil pump, and a heat exchanger that exchanges heat between a cooling fluid of the drive source and hydraulic oil of the transmission. A control device for a vehicle, the control device increasing the flow rate of the hydraulic oil supplied to the heat exchanger by driving the electric oil pump based on the temperature of the coolant and the temperature of the hydraulic oil. the electric oil pump ; If the operating time of the hydraulic oil is less than the predetermined time, and the temperature of the hydraulic oil is below the predetermined oil temperature, and the temperature increase rate of the hydraulic oil is above the predetermined rate, the vehicle control device continues to execute the control. provided.

According to these aspects, by increasing the flow rate of the hydraulic oil supplied to the heat exchanger, it is possible to increase the amount of heat exchanged by the heat exchanger that exchanges heat between the hydraulic oil and the coolant. Therefore, at least one of the oil temperature and the liquid temperature can be quickly brought close to the appropriate temperature.

Further , according to these aspects, an electric oil pump driven by a non-driving source is driven. Therefore, according to these aspects, the amount of heat exchanged by the heat exchanger can be increased without affecting driveability.

FIG. 1 is a schematic configuration diagram of a vehicle. FIG. 2 is a flowchart illustrating an example of control performed by a controller. FIG. 2 is a diagram showing an operating region of an electric oil pump 22. FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a vehicle. The vehicle includes an engine ENG, a torque converter TC, a forward/reverse switching mechanism SWM, and a variator VA. In the vehicle, the transmission TM includes a torque converter TC, a forward/reverse switching mechanism SWM, and a variator VA. The transmission TM is an automatic transmission, and in this embodiment is a belt-type continuously variable transmission.

Engine ENG constitutes a drive source of the vehicle. The power of the engine ENG is transmitted to the driving wheels via the torque converter TC, the forward/reverse switching mechanism SWM, and the variator VA. In other words, the torque converter TC, the forward/reverse switching mechanism SWM, and the variator VA are provided in the power transmission path from the engine ENG to the drive wheels.

Torque converter TC transmits power via fluid. In torque converter TC, power transmission efficiency is increased by engaging lock-up clutch LU.

The forward/reverse switching mechanism SWM is provided in a power transmission path connecting the engine ENG and the variator VA. The forward/reverse switching mechanism SWM switches the vehicle forward/backward by switching the direction of input rotation. The forward/reverse switching mechanism SWM includes a forward clutch FWD/C that is engaged when selecting a forward range, and a reverse brake REV/B that is engaged when selecting a reverse range. When the forward clutch FWD/C and the reverse brake REV/B are released, the transmission TM enters a neutral state, that is, a power cutoff state.

The variator VA constitutes a belt-type continuously variable transmission mechanism including a primary pulley PRI, a secondary pulley SEC, and a belt BLT wound around the primary pulley PRI and the secondary pulley SEC. A primary pressure Ppri is supplied to the primary pulley PRI, and a secondary pressure Psec is supplied to the secondary pulley SEC from a hydraulic control circuit 11, which will be described later.

The transmission TM further includes a mechanical oil pump 21 and an electric oil pump 22.

Mechanical oil pump 21 pumps oil OIL to hydraulic control circuit 11 . The mechanical oil pump 21 is a mechanical oil pump driven by the power of the engine ENG. The electric oil pump 22 pumps oil OIL to the hydraulic control circuit 11 together with the mechanical oil pump 21 or alone. The electric oil pump 22 is provided in parallel with the mechanical oil pump 21 with respect to the hydraulic control circuit 11 on the hydraulic path, and is also provided auxiliary to the mechanical oil pump 21 . The oil OIL supplied by the mechanical oil pump 21 and the electric oil pump 22 constitutes the hydraulic oil of the transmission TM.

The transmission TM further includes a hydraulic control circuit 11, an oil pan 12, an oil cooler 13, and a controller 50.

The hydraulic control circuit 11 is comprised of a plurality of flow paths and a plurality of hydraulic control valves, and regulates the pressure of oil OIL supplied from the mechanical oil pump 21 and the electric oil pump 22, and supplies it to each part of the transmission TM. The oil OIL supplied to each part of the transmission TM then returns to the mechanical oil pump 21 and the electric oil pump 22 via the oil pan 12 and oil cooler 13, which are oil storage parts of the transmission TM.

The oil cooler 13 is a heat exchanger that exchanges heat between the coolant W of the engine ENG and the oil OIL of the transmission TM. Coolant W discharged from the engine ENG and oil OIL discharged from the oil pan 12 flow into the oil cooler 13 . The oil cooler 13 is provided in an oil path connecting the oil pan 12, the mechanical oil pump 21, and the electric oil pump 22 on the oil pressure path of the transmission TM. Therefore, the oil OIL that has passed through the oil cooler 13 then flows into at least one of the mechanical oil pump 21 and the electric oil pump 22. The coolant W that has passed through the oil cooler 13 then returns to the engine ENG.

The oil cooler 13 functions as a cooler that cools the oil OIL of the transmission TM, and also functions as a warmer that warms the oil OIL of the transmission TM.

When the oil temperature TOIL of the oil OIL of the transmission TM flowing through the oil cooler 13 is higher than the liquid temperature TW of the coolant W of the engine ENG flowing through the oil cooler 13, the oil cooler 13 controls the oil OIL of the transmission TM. functions as a cooler.

When the liquid temperature TW of the engine ENG coolant W flowing through the oil cooler 13 is higher than the oil temperature TOIL of the transmission TM oil OIL flowing through the oil cooler 13, the oil cooler 13 cools the transmission TM oil OIL. It also functions as a warmer.

The controller 50 is a controller for controlling the transmission TM, and signals from the sensor switch group 40 indicating various sensor switches are input to the controller 50. The sensor/switch group 40 includes, for example, a vehicle speed sensor that detects the vehicle speed VSP, an accelerator opening sensor that detects the accelerator opening APO, an engine rotational speed sensor that detects the rotational speed Ne of the engine ENG, and a brake sensor that detects the brake fluid pressure. Includes an oil temperature sensor that detects.

The sensor/switch group 40 further includes, for example, a primary pressure sensor that detects the primary pressure Ppri, a secondary pressure sensor that detects the secondary pressure Psec, a rotational speed sensor that detects the rotational speed Npri of the primary pulley PRI, and a rotational speed Nsec of the secondary pulley SEC. a position sensor that detects the operation position of the gear shift lever, an outside temperature sensor that detects the outside air temperature TA of the vehicle, an oil temperature sensor that detects the oil temperature TOIL of the transmission TM, and a fluid temperature TW of the engine ENG. Contains a liquid temperature sensor that detects the temperature of the liquid. The oil temperature TOIL can be, for example, the temperature of the oil OIL at the oil outlet portion of the oil pan 12. The liquid temperature TW can be, for example, the temperature of the coolant W at the coolant outlet of the engine ENG.

These signals are input directly to the controller 50 or via an engine controller or the like. The controller 50 further receives, for example, information on the torque Tq of the engine ENG from an engine controller for controlling the engine ENG. Controller 50 controls transmission TM based on these signals.

The transmission TM is controlled by controlling the hydraulic control circuit 11 and the electric oil pump 22 based on these signals. The hydraulic control circuit 11 performs hydraulic control of the lock-up clutch LU, forward clutch FWD/C, reverse brake REV/B, primary pulley PRI, secondary pulley SEC, etc. based on instructions from the controller 50. The electric oil pump 22 can be controlled by controlling an inverter that supplies current to the drive motor of the electric oil pump 22.

By the way, the oil temperature TOIL has an appropriate oil temperature. Therefore, when the oil temperature TOIL is low, it is preferable to bring the oil temperature TOIL close to the appropriate oil temperature as quickly as possible. Further, there is an appropriate liquid temperature for the liquid temperature TW. Therefore, when the liquid temperature TW is low, it is preferable to bring the liquid temperature TW close to the appropriate liquid temperature as quickly as possible.

In view of such circumstances, in this embodiment, the controller 50 performs the control described below.

FIG. 2 is a flowchart illustrating an example of control performed by the controller 50. The controller 50 is configured to include a control section by being programmed to perform the processing of this flowchart.

In step S1, the controller 50 determines whether the outside air temperature TA is less than a predetermined temperature TA1. The predetermined temperature TA1 is a value for specifying whether or not it is necessary to increase the heat exchange amount of the oil cooler 13 in order to adjust the liquid temperature TW and the oil temperature TOIL to appropriate temperatures, and when the outside air temperature TA is less than the predetermined temperature TA1, the heat exchange is performed. It is judged that an increase in the amount is necessary. If the determination in step S1 is negative, the process ends once, and if the determination in step S1 is affirmative, the process proceeds to step S2.

In step S2, the controller 50 determines whether or not the electric oil pump 22 is in the operating range R. The operating region R is a region in which the flow rate of oil OIL supplied to the oil cooler 13 is increased by operating the electric oil pump 22, and is set in advance as follows.

FIG. 3 is a diagram showing the operating range R of the electric oil pump 22. As shown in FIG. In the map shown in FIG. 3, the state point P is determined based on the fluid temperature TW and the oil temperature TOIL, with the lowest value TAMIN of the outside air temperature TA expected to be used by the vehicle as the lowest value of the fluid temperature TW and the oil temperature TOIL. The liquid temperature TW can be detected by a liquid temperature sensor, and the oil temperature TOIL can be detected by an oil temperature sensor. For example, the liquid temperature TW and the oil temperature TOIL may be estimated values estimated based on parameters having a correlation therewith.

As shown in FIG. 3, the operating range R is set according to the liquid temperature TW and the oil temperature TOIL. The operating region R includes a cooler region R1 and a warmer region R2.

The cooler region R1 is a region where the oil cooler 13 functions as a cooler for the oil OIL of the transmission TM, and is a region where the oil temperature TOIL is higher than the fluid temperature TW. The cooler region R1 is further defined as a region below a predetermined oil temperature TOIL1, which is the lower limit of the appropriate oil temperature TOIL.

The warmer region R2 is a region in which the oil cooler 13 functions as a warmer for the oil OIL of the transmission TM, and is a region where the fluid temperature TW is higher than the oil temperature TOIL. The warmer region R2 is further defined as a region where the liquid temperature TW is lower than the predetermined liquid temperature TW1, which is the lower limit of the appropriate temperature.

Generally, there are overwhelmingly many situations where the oil temperature TOIL is higher than the liquid temperature TW. However, since the engine ENG generates a large amount of heat when the engine is cold, there may be situations where the fluid temperature TW temporarily becomes higher than the oil temperature TOIL.

A prohibited area is provided between the cooler area R1 and the warmer area R2. The prohibited area is sandwiched between two boundary lines that are equidistantly offset on both sides of the high oil temperature low liquid temperature side and the low oil temperature high liquid temperature side of the isothermal line where the liquid temperature TW and the oil temperature TOIL are equal. It is said to be an area where In the prohibited area, the operation of the electric oil pump 22 based on the map shown in FIG. 3 is prohibited. The prohibited area also serves as a hysteresis area provided between the cooler area R1 and the warmer area R2.

The state point P is included in the prohibited region when the absolute value of the difference ΔT between the liquid temperature TW and the oil temperature TOIL is less than the predetermined difference ΔT1. Therefore, under the condition that the absolute value of the difference ΔT is greater than or equal to the predetermined difference ΔT1, the operating region R is further divided from the prohibited region provided as described above. The prohibited region further includes a region where the liquid temperature TW is equal to or higher than the predetermined fluid temperature TW1, and a region where the oil temperature TOIL is equal to or higher than the predetermined oil temperature TOIL1.

Returning to FIG. 2, in step S2, an affirmative determination is made when the state point P is included in the actuation region R, and a negative determination is made when the state point P is included in the prohibited region. If an affirmative determination is made in step S2, the process proceeds to step S3.

In step S3, the controller 50 operates the electric oil pump 22. In step S3, the controller 50 operates the electric oil pump 22 at intervals. This will be discussed later.

In step S3, the controller 50 drives the electric oil pump 22 based on the fluid temperature TW and the oil temperature TOIL by driving the electric oil pump 22 based on the map shown in FIG. The controller 50 executes control to increase the flow rate of oil OIL supplied to the oil cooler 13 by driving the electric oil pump 22 in this manner. Hereinafter, this control will also be referred to as oil amount increase control.

By performing the oil amount increase control, the flow rate of oil OIL flowing through the oil cooler 13 increases, so that heat exchange in the oil cooler 13 is promoted. In step S3, when the state point P is in the cooler region R1, the coolant W of the engine ENG is heated by the oil OIL of the transmission TM, and when the state point P is in the warmer region R2, the engine ENG coolant W is heated by the oil OIL of the transmission TM. The oil OIL of the transmission TM is heated by the coolant W.

Therefore, in step S3, by performing oil amount increase control, at least one of the oil temperature TOIL and the liquid temperature TW is quickly brought close to the appropriate temperature.

In order to increase the flow rate of oil OIL supplied to the oil cooler 13 by driving the electric oil pump 22, the mechanical oil pump 21 and the electric oil pump 22 must have a flow rate greater than the flow rate required for operating the transmission TM. It may be generated by Therefore, in step S3, the flow rate of the electric oil pump 22 is determined in consideration of the current flow rate of the mechanical oil pump 21.

In step S4, the controller 50 determines whether the rate of increase ΔTOIL of the oil temperature TOIL is equal to or greater than a predetermined rate ΔTOIL1. The predetermined rate ΔTOIL1 is a value for regulating a sudden rise in the oil temperature TOIL, and is set in advance. A sudden rise in the oil temperature TOIL occurs, for example, when the accelerator pedal and the brake pedal are depressed at the same time while the lock-up clutch LU is released. If the determination in step S4 is negative, the process ends once.

In the subsequent routine, if affirmative determinations are made in steps S1 and S2, the process proceeds to step S3, and the operation of the electric oil pump 22 is continued. Further, if a negative determination is made in the subsequent step S4, the process is temporarily terminated. That is, while a positive determination is made in steps S1 and S2 and a negative determination is made in step S4, the operation of the electric oil pump 22 is continued in step S3.

In such a case, the controller 50 operates the electric oil pump 22 at intervals as described above. The interval is established by prohibiting the electric oil pump 22 from being driven when the electric oil pump 22 has been continuously operated for a predetermined period of time SC1 or more. This prevents the electric oil pump 22 from being operated beyond the continuous operation time, and protects the electric oil pump 22.

The continuous operation time of the electric oil pump 22 varies depending on the set flow rate of the electric oil pump 22. Therefore, the predetermined time SC1 can be set based on the set flow rate of the electric oil pump 22, for example.

If the determination in step S4 is affirmative, the process proceeds to step S5. In step S5, the controller 50 determines whether the operating time of the electric oil pump 22 during which the oil temperature TOIL is rapidly increasing is longer than the predetermined time SC2. The predetermined time SC2 is a determination value for determining whether to continue operating the electric oil pump 22 when the oil temperature TOIL is rapidly increasing, and is set in advance. The predetermined time SC2 is set shorter than the predetermined time SC1, and the predetermined time SC1 can be set to have a margin of at least the predetermined time SC2 with respect to the continuous operation time.

If the operating time of the electric oil pump 22 during which the oil temperature TOIL is rapidly increasing is less than the predetermined time SC2, the process is temporarily terminated. In this case, if a negative determination is made in step S4 while the processes from step S1 to step S5 are repeatedly performed, it means that a sudden rise in the oil temperature TOIL has been suppressed by heat exchange by the oil cooler 13.

If the operating time of the electric oil pump 22 is longer than the predetermined time SC2 when the oil temperature TOIL is rapidly increasing, it is determined that heat exchange by the oil cooler 13 alone is not enough to cope with the rapid increase in the oil temperature TOIL. In this case, the process proceeds to step S6, and the controller 50 prohibits the operation of the electric oil pump 22. That is, in step S6, the oil amount increase control performed in step S3 is prohibited.

In this case, the oil temperature TOIL can be lowered by control other than the oil amount increase control, such as torque limit control of the engine ENG. Therefore, in this case, energy consumption by the electric oil pump 22 is suppressed by prohibiting the operation of the electric oil pump 22.

If the determination in step S2 is negative, the process also proceeds to step S6. In step S2, for example, in the map shown in FIG. 3, a negative determination is also made when the oil temperature TOIL becomes equal to or higher than the predetermined oil temperature TOIL1. That is, even when the oil temperature TOIL is equal to or higher than the predetermined oil temperature TOIL1, the oil amount increase control is prohibited. In this case, since the oil temperature TOIL is an appropriate temperature, energy consumption caused by operating the electric oil pump 22 more than necessary is suppressed. After step S6, the process ends once.

Next, the main effects of this embodiment will be explained.

The controller 50 includes an engine ENG, a transmission TM having a mechanical oil pump 21 and an electric oil pump 22 driven by the engine ENG, and an oil that performs heat exchange between the coolant W of the engine ENG and the oil OIL of the transmission TM. This constitutes a control device for a vehicle having a cooler 13. The controller 50 executes control to increase the flow rate of oil OIL supplied to the oil cooler 13 by driving the electric oil pump 22 based on the liquid temperature TW and the oil temperature TOIL.

According to such a configuration, by increasing the flow rate of the oil OIL supplied to the oil cooler 13, the amount of heat exchanged by the oil cooler 13 that exchanges heat between the oil OIL and the coolant W can be increased. Therefore, at least one of the oil temperature TOIL and the liquid temperature TW can be quickly brought close to the appropriate temperature (effects corresponding to claims 1 and 6).

In addition, if the rotational speed Ne of the engine ENG is increased to increase the flow rate of the mechanical oil pump 21, the drivability will be affected, but with this configuration, the electric oil pump 22, which is driven by a non-driving source, is driven. let Therefore, with such a configuration, the amount of heat exchanged by the oil cooler 13 can be increased without affecting driveability (effects corresponding to claims 1 and 6).

In the oil cooler 13, the greater the difference between the liquid temperature TW and the oil temperature TOIL, the higher the heat exchange effect.

Therefore, when the absolute value of the difference ΔT between the liquid temperature TW and the oil temperature TOIL exceeds the predetermined difference ΔT1, the controller 50 drives the electric oil pump 22 to reduce the amount of oil OIL supplied to the oil cooler 13. Increase flow rate.

According to such a configuration, the electric oil pump 22 is driven when the discrepancy between the liquid temperature TW and the oil temperature TOIL is large, and the electric oil pump 22 is not driven when such a case does not apply, so that the temperature can be quickly brought to an appropriate temperature. While achieving this, it is possible to suppress energy consumption by the electric oil pump 22 (effect corresponding to claim 2).

The controller 50 prohibits driving of the electric oil pump 22 when the electric oil pump 22 has been continuously operated for a predetermined time period SC1 or more.

According to such a configuration, it is possible to protect the electric oil pump 22 by providing intervals between the operations of the electric oil pump 22, and as a secondary effect, it is also possible to achieve energy saving (Claim 3). ).

The controller 50 prohibits the oil amount increase control when the oil temperature TOIL is equal to or higher than the predetermined oil temperature TOIL1.

According to such a configuration, when the oil temperature TOIL reaches the appropriate oil temperature, the oil amount increase control can be prohibited and the energy consumption by the electric oil pump 22 can be suppressed (an effect corresponding to claim 4).

The controller 50 prohibits oil amount increase control when the rate of increase ΔTOIL of the oil temperature TOIL is equal to or higher than a predetermined rate ΔTOIL1.

According to such a configuration, in view of the fact that a sudden increase in the oil temperature TOIL can be suppressed by a control different from the oil amount increase control, the oil amount increase control is prohibited, so that energy consumption by the electric oil pump 22 can be suppressed. (Effect corresponding to claim 5).

Although the embodiments of the present invention have been described above, the above embodiments merely show a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. do not have.

In the embodiment described above, a case has been described in which a prohibited area is provided between the cooler area R1 and the warmer area R2. However, there is no particular need to provide a prohibited area between the cooler area R1 and the warmer area R2. In this case, both the cooler region R1 and the warmer region R2 are expanded to the isothermal line between the liquid temperature TW and the oil temperature TOIL. The isothermal line can be included in either the cooler region R1 or the warmer region R2.

In the embodiment described above, a case has been described in which the hydraulic path for supplying oil OIL from the electric oil pump 22 to the oil cooler 13 does not specifically include a valve for supplying oil OIL to the oil cooler 13. However, the hydraulic path for supplying oil OIL from electric oil pump 22 to oil cooler 13 may be provided with a valve for supplying oil OIL to oil cooler 13 .

As such a valve, for example, a bypass valve may be provided that bypasses the oil cooler 13 and, if there is a flow rate of oil OIL more than necessary, discharges the flow rate of oil OIL more than necessary and supplies it to the oil cooler 13. Can be done. In this case, if the flow rate of oil OIL is simply increased by the electric oil pump 22 so that a flow rate higher than the required flow rate is generated by the mechanical oil pump 21 and the electric oil pump 22, the flow rate of the oil OIL flowing into the oil cooler 13 can be increased. can be increased.

The hydraulic path for supplying the oil OIL from the electric oil pump 22 to the oil cooler 13 may be provided with a dedicated path and a dedicated valve for sending the oil OIL from the electric oil pump 22 to the oil cooler 13. In this case, the flow rate of the oil OIL flowing into the oil cooler 13 can be increased by driving the electric oil pump 22 and opening the dedicated valve using the oil amount increase control.

In the embodiment described above, the case where the control unit is realized by the controller 50 has been described. However, the control unit may be realized by, for example, a single controller.

13 Oil cooler (heat exchanger)
21 Mechanical oil pump 22 Electric oil pump 50 Controller (control unit)
ENG engine (drive source)
TM Transmission W Coolant OIL Oil (hydraulic oil)

Claims (5)

A driving source,
a transmission having an electric oil pump;
a heat exchanger that exchanges heat between the cooling fluid of the drive source and the hydraulic oil of the transmission;
A control device for a vehicle having:
a control unit that executes control to increase the flow rate of the hydraulic oil supplied to the heat exchanger by driving the electric oil pump based on the temperature of the coolant and the temperature of the hydraulic oil; ,
The control unit prohibits the control when the temperature of the hydraulic oil is equal to or higher than a predetermined oil temperature, and when the operating time of the electric oil pump is less than a predetermined time, the temperature of the hydraulic oil is lower than the predetermined oil temperature. or below, and if the temperature increase rate of the hydraulic oil is equal to or higher than a predetermined rate, continue to execute the control;
A vehicle control device characterized by: The vehicle control device according to claim 1,
When the absolute value of the difference between the temperature of the coolant and the temperature of the hydraulic oil becomes a predetermined difference or more, the control unit drives the electric oil pump to reduce the hydraulic oil supplied to the heat exchanger. increase the flow rate of
A vehicle control device characterized by: The vehicle control device according to claim 1 or 2,
The control unit prohibits driving of the electric oil pump when the electric oil pump continues to operate for a predetermined time different from the predetermined time.
A vehicle control device characterized by: A method for controlling a vehicle including a drive source, a transmission having an electric oil pump, and a heat exchanger for exchanging heat between a cooling fluid of the drive source and hydraulic oil of the transmission, the method comprising:
Executing control to increase the flow rate of the hydraulic oil supplied to the heat exchanger by driving the electric oil pump based on the temperature of the coolant and the temperature of the hydraulic oil,
If the temperature of the hydraulic oil is equal to or higher than the predetermined oil temperature, the control is prohibited, and if the operating time of the electric oil pump is less than the predetermined time, the temperature of the hydraulic oil is equal to or lower than the predetermined oil temperature, and the control is prohibited. continuing to execute the control when the temperature rise rate of the hydraulic oil is equal to or higher than a predetermined rate;
A vehicle control method characterized by comprising: A driving source,
a transmission having an electric oil pump;
a heat exchanger that exchanges heat between the cooling fluid of the drive source and the hydraulic oil of the transmission;
A control device for a vehicle having:
a control unit that executes control to increase the flow rate of the hydraulic oil supplied to the heat exchanger by driving the electric oil pump based on the temperature of the coolant and the temperature of the hydraulic oil; ,
The control unit prohibits the control when the temperature of the hydraulic oil is equal to or higher than a predetermined oil temperature and the temperature of the coolant is equal to or higher than a predetermined temperature, and when the operating time of the electric oil pump is less than a predetermined time. continue to execute the control when the temperature of the hydraulic oil is below the predetermined oil temperature and the temperature increase rate of the hydraulic oil is above the predetermined rate;
A vehicle control device characterized by:

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