Control device of vehicle and control method of vehicle

Patent metadata

Field	Value
Publication number	US-2019193576-A1
Application number	US-201816209068-A
Country	US
Kind code	A1
Filing date	Dec 4, 2018
Priority date	Dec 22, 2017
Publication date	Jun 27, 2019
Grant date	—

Abstract

A control device of a vehicle includes a motor temperature acquirer; an oil temperature acquirer; and a torque controller. The motor temperature acquirer acquires a temperature of a motor that drives the vehicle. The oil temperature acquirer acquires a temperature of oil that cools the motor. The torque controller controls a torque of the motor on a basis of the temperature of the motor and the temperature of the oil.

First claim

1 . A control device of a vehicle, the control device comprising:
a motor temperature acquirer configured to acquire a temperature of a motor that drives the vehicle; an oil temperature acquirer configured to acquire a temperature of an oil that cools the motor; and a torque controller configured to control a torque of the motor on a basis of the temperature of the motor and the temperature of the oil.

2 . The control device of a vehicle according to claim 1 , the control device further comprising
a rotation speed acquirer configured to acquire a rotation speed of the motor, wherein the torque controller controls the torque of the motor on a basis of the temperature of the motor, the temperature of the oil, and the rotation speed of the motor.

3 . The control device of a vehicle according to claim 1 ,
wherein the motor temperature acquirer acquires the temperature of the motor from a temperature sensor configured to detect a temperature of a stator of the motor.

4 . The control device of a vehicle according to claim 2 ,
wherein the motor temperature acquirer acquires the temperature of the motor from a temperature sensor configured to detect a temperature of a stator of the motor.

5 . The control device of a vehicle according to claim 1 ,
wherein the oil temperature acquirer acquires the temperature of the oil from a temperature sensor configured to detect the temperature of the oil in a reservoir that stores the oil.

6 . The control device of a vehicle according to claim 2 ,
wherein the oil temperature acquirer acquires the temperature of the oil from a temperature sensor configured to detect the temperature of the oil in a reservoir that stores the oil.

7 . The control device of a vehicle according to claim 3 ,
wherein the oil temperature acquirer acquires the temperature of the oil from a temperature sensor configured to detect the temperature of the oil in a reservoir that stores the oil.

8 . The control device of a vehicle according to claim 4 ,
wherein the oil temperature acquirer acquires the temperature of the oil from a temperature sensor configured to detect the temperature of the oil in a reservoir that stores the oil.

9 . The control device of a vehicle according to claim 2 ,
wherein the torque controller limits the torque of the motor on a basis of a coefficient decided in accordance with the temperature of the motor, the temperature of the oil, and the rotation speed of the motor.

10 . The control device of a vehicle according to claim 9 ,
wherein the torque controller increases a limitation amount of the torque of the motor as the rotation speed of the motor increases.

11 . The control device of a vehicle according to claim 9 ,
wherein the torque of the motor is controlled on a basis of maps that define relations among the rotation speed of the motor, the temperature of the oil, and the coefficient that are set in advance in accordance with the temperature of the motor.

12 . The control device of a vehicle according to claim 11 ,
wherein the torque controller expands a limitation range of the torque of the motor as the temperature of the oil increases in the map.

13 . The control device of a vehicle according to claim 9 ,
wherein, when the temperature of the oil reaches a predetermined value, the torque controller limits the torque of the motor to zero regardless of the temperature of the motor and the rotation speed of the motor.

14 . The control device of a vehicle according to claim 9 ,
wherein, in a case where the temperature of the motor is a predetermined value or less, the torque controller does not limit the torque of the motor regardless of the rotation speed of the motor, and in a case where the temperature of the oil reaches a predetermined value, the torque controller limits the torque of the motor to zero.

15 . A control method of a vehicle, the control method comprising:
acquiring a temperature of a motor that drives the vehicle; acquiring a temperature of an oil that cools the motor; and controlling a torque of the motor on a basis of the temperature of the motor and the temperature of the oil.

16 . A control device of a vehicle, the control device comprising:
circuitry configured to acquire a temperature of a motor that drives the vehicle, acquire a temperature of an oil that cools the motor, and control a torque of the motor on a basis of the temperature of the motor and the temperature of the oil.

Assignees

• Subaru Corp

Inventors

• Kuroe Hironori
• Morita Tomohiro
• Takeda Kazunari

Classifications

• B60L2240/425

  Temperature · CPC title

• B60L2240/423

  Torque · CPC title

• B60L2240/421

  Speed · CPC title

• B60L15/20 Primary

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• B60L2240/36

  Temperature of vehicle components or parts · CPC title