Controller for vehicle

Patent metadata

Field	Value
Publication number	US-9981666-B2
Application number	US-201515110838-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Jan 14, 2014
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A controller for a vehicle is provided. The vehicle includes an engine, a rotary machine, at least one driving wheel, a first clutch disposed between a power transmission member and the rotary machine, the power transmission member being disposed between the engine and the driving wheel, the first clutch being configured to be switched to an engaged state or a disengaged state, and a second clutch disposed in parallel with the first clutch, the second clutch being a one-way clutch. The controller includes an electronic control unit. The electronic control unit is configured to control at least one of the rotary machine or the first clutch so as to reduce inertia of the power transmission member based on a torsional load acting on the power transmission member.

First claim

What is claimed is:

1. A controller for a vehicle, the vehicle including an engine, a rotary machine, at least one driving wheel, a first clutch disposed between a power transmission member and the rotary machine, and a parking unit, the power transmission member being disposed between the engine and the driving wheel, the first clutch being configured to be switched to an engaged state or a disengaged state, and a second clutch disposed in parallel with the first clutch, and disposed between the power transmission member and the rotary machine, the second clutch being a one-way clutch, the parking unit configured to switch between a locked state in which rotation of the power transmission member is inhibited and an unlocked state in which the rotation of the power transmission member is permitted, the controller comprising:
an electronic control unit configured to control at least one of the rotary machine or the first clutch so as to reduce inertia of the power transmission member based on a torsional load acting on the power transmission member, the electronic control unit configured to rotate the rotary machine in a rotation direction in which the second clutch is disengaged so that the rotary machine is separated from the power transmission member before switching the parking unit to the unlocked state when a request to switch the parking unit to the unlocked state is given.

2. The controller according to claim 1 , wherein
the electronic control unit is configured to rotate the rotary machine in the rotation direction in which the second clutch is disengaged when the request to switch the parking unit to the unlocked state is given and the vehicle is stationary on a slope road.

3. The controller according to claim 1 , wherein
the electronic control unit is configured to output a command to switch the parking unit to the unlocked state after rotating the rotary machine in the rotation direction in which the second clutch is disengaged.

4. The controller according to claim 1 , wherein
the electronic control unit is configured to switch the first clutch to the disengaged state when the electronic control unit detects that the vehicle travels on an uneven road.

5. A controller for a vehicle, the vehicle including an engine, a rotary machine, at least one driving wheel, a first clutch disposed between a power transmission member and the rotary machine, and a parking unit, the power transmission member being disposed between the engine and the driving wheel, the first clutch being configured to be switched to an engaged state or a disengaged state, and a second clutch disposed in parallel with the first clutch, and disposed between the power transmission member and the rotary machine, the second clutch being a one-way clutch, the parking unit configured to switch between a locked state in which rotation of the power transmission member is inhibited and an unlocked state in which the rotation of the power transmission member is permitted, the controller comprising:
an electronic control unit configured to control at least one of the rotary machine or the first clutch so as to intercept power transmission between the power transmission member and the rotary machine based on a torsional load acting on the power transmission member, the electronic control unit configured to rotate the rotary machine in a rotation direction in which the second clutch is disengaged so that the rotary machine is separated from the power transmission member before switching the parking unit to the unlocked state when a request to switch the parking unit to the unlocked state is given.

6. The controller according to claim 5 , wherein
the electronic control unit is configured to rotate the rotary machine in the rotation direction in which the second clutch is disengaged when the request to switch the parking unit to the unlocked state is given and the vehicle is stationary on a slope road.

7. The controller according to claim 5 , wherein
the electronic control unit is configured to output a command to switch the parking unit to the unlocked state after rotating the rotary machine in the rotation direction in which the second clutch is disengaged.

8. The controller according to claim 5 , wherein
the electronic control unit is configured to switch the first clutch to the disengaged state when the electronic control unit detects that the vehicle travels on an uneven road.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ono Tomohito
• Endo Takahito
• Iwase Yuji

Classifications

• B60K2006/381

  characterized by driveline brakes · CPC title

• B60W30/18118

  Hill holding · CPC title

• B60W10/182

  including control of parking brakes · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W2710/08

  Electric propulsion units · CPC title