Vehicle control apparatus and vehicle control method

Patent metadata

Field	Value
Publication number	US-9802588-B2
Application number	US-201615349544-A
Country	US
Kind code	B2
Filing date	Nov 11, 2016
Priority date	Feb 26, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A vehicle control apparatus which performs a travel control of a vehicle during a traffic jam, includes a wheel setting unit configured to set at least one wheel to be a brake wheel to be applied with a braking force during the travel control and at least one wheel to be a non-brake wheel not to be applied with the braking force during the travel control, and a control unit configured to perform the travel control of the vehicle based on a rotation amount of the at least one brake wheel and a rotation amount of the at least one non-brake wheel detected by a wheel speed sensor detecting the rotation amount of a wheel of the vehicle.

First claim

What is claimed is:

1. A vehicle control apparatus which performs a travel control of a vehicle during a traffic jam, comprising:
a wheel setting unit configured to determine at least one wheel to be a brake wheel to be applied with a braking force or a driving force during the travel control and at least one wheel to be a non-brake wheel not to be applied with the braking force and the driving force during the travel control; and
a control unit configured to perform the travel control of the vehicle based on a rotation amount of the at least one brake wheel and a rotation amount of the at least one non-brake wheel, wherein the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel are detected by respective wheel speed sensors.

2. The vehicle control apparatus according to claim 1 ,
wherein the control unit estimates a moving state amount of the vehicle based on the rotation amount of the at least one non-brake wheel, and controls the at least one brake wheel using the moving state amount of the vehicle.

3. The vehicle control apparatus according to claim 2 ,
wherein the moving state amount of the vehicle is a movement distance, a speed, an acceleration, or a differential value of the acceleration of the vehicle.

4. The vehicle control apparatus according to claim 3 ,
wherein the control unit decides whether or not the at least one brake wheel becomes locked based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

5. The vehicle control apparatus according to claim 3 ,
wherein the control unit decides whether or not the at least one brake wheel becomes slipped based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

6. The vehicle control apparatus according to claim 5 ,
wherein when the at least one brake wheel becomes slipped, the control unit decreases the driving force with respect to the at least one brake wheel that became slipped.

7. The vehicle control apparatus according to claim 2 ,
wherein the control unit decides whether or not the at least one brake wheel becomes locked based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

8. The vehicle control apparatus according to claim 2 ,
wherein the control unit decides whether or not the at least one brake wheel becomes slipped based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

9. The vehicle control apparatus according to claim 8 ,
wherein when the at least one brake wheel becomes slipped, the control unit decreases the driving force with respect to the at least one brake wheel that became slipped.

10. The vehicle control apparatus according to claim 1 ,
wherein the control unit decides whether or not the at least one brake wheel becomes locked based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

11. The vehicle control apparatus according to claim 1 ,
wherein the control unit decides whether or not the at least one brake wheel becomes slipped based on a difference between the rotation amount of the at least one brake wheel and the rotation amount of the at least one non-brake wheel.

12. The vehicle control apparatus according to claim 11 ,
wherein when the at least one brake wheel becomes slipped, the control unit decreases the driving force with respect to the at least one brake wheel that became slipped.

Assignees

• Toyota Motor Co Ltd

Inventors

• Inoue Go
• Fujita Yoshitaka

Classifications

• B60T2250/04

  Vehicle reference speed; Vehicle body speed · CPC title

• B60T8/17616

  Microprocessor-based systems · CPC title

• B60T7/22 Primary

  initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle {, or by means of contactless obstacle detectors mounted on the vehicle} · CPC title

• B60T8/1761 Primary

  responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure · CPC title

• B60T8/86

  wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs · CPC title