Vehicle control system

Patent metadata

Field	Value
Publication number	US-9592825-B2
Application number	US-201314655409-A
Country	US
Kind code	B2
Filing date	Oct 11, 2013
Priority date	Dec 26, 2012
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A vehicle control system is provided with a first driving force control means that controls a turning performance of a vehicle by controlling a driving force delivered from a prime mover to driving wheels so as to adjust the turning condition of the vehicle to an intended turning condition. The first driving force control means is configured to calculate a correction amount of the driving force required to adjust an actual turning condition of the vehicle to the intended turning condition, and to restrict the correction amount to zero or smaller so as not to increase the driving force if the correction amount is positive value.

First claim

The invention claimed is:

1. A vehicle control system, comprising:
a control unit that controls a turning performance of a vehicle by controlling a driving force delivered from a prime mover to driving wheels so as to adjust the turning condition of the vehicle to an intended turning condition and by differentiating driving forces applied to right and left wheels,
wherein the control unit is configured to calculate a correction amount of the driving force required to adjust an actual turning condition of the vehicle to the intended turning condition, and to restrict the correction amount to zero or smaller so as not to increase the driving force if the correction amount is positive value.

2. The vehicle control system according to claim 1 ,
wherein the control unit is further configured to restrict the correction amount to a limit value calculated in a manner to prevent a reduction in the driving force, if the correction amount of the driving force required to adjust the actual turning condition of the vehicle to the intended turning condition is negative value.

3. The vehicle control system as claimed in claim 1 ,
wherein the control unit is further configured to calculate a difference between the driving forces applied to the right and the left wheels required to adjust the actual turning condition of the vehicle to the intended turning condition based on the calculated correction amount.

4. The vehicle control system as claimed in claim 3 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a braking device adapted to apply a braking force to each wheel.

5. The vehicle control system as claimed in claim 3 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a differential gear unit adapted to control a distribution ratio of the driving force to the right and the left wheels.

6. The vehicle control system as claimed in claim 2 , wherein the control unit is further configured to calculate a difference between the driving forces applied to the right and the left wheels required to adjust the actual turning condition of the vehicle to the intended turning condition based on the calculated correction amount.

7. The vehicle control system as claimed in claim 6 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a braking device adapted to apply a braking force to each wheel.

8. The vehicle control system as claimed in claim 4 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a differential gear unit adapted to control a distribution ratio of the driving force to the right and the left wheels.

9. The vehicle control system as claimed in claim 6 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a differential gear unit adapted to control a distribution ratio of the driving force to the right and the left wheels.

10. The vehicle control system as claimed in claim 7 , wherein the control unit is further configured to differentiate the driving forces applied to right and left wheels by controlling a differential gear unit adapted to control a distribution ratio of the driving force to the right and the left wheels.

Assignees

• Toyota Motor Co Ltd

Inventors

• Okumura Kazuya
• Yoshikawa Hayato

Classifications

• B60T8/1755 Primary

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B60T7/12

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• B60T2201/16

  Curve braking control, e.g. turn control within ABS control algorithm · CPC title

• B60T2270/303

  Stability control with active acceleration · CPC title

• B60W30/045 Primary

  Improving turning performance · CPC title