Vehicle control system

Patent metadata

Field	Value
Publication number	US-11518405-B2
Application number	US-201916955413-A
Country	US
Kind code	B2
Filing date	Jan 22, 2019
Priority date	Jan 23, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Provided is a vehicle control system capable of, when a swaying phenomenon occurs during towing, preventing the swaying phenomenon from becoming worse due to driving force reduction control based on an increase in steering angle-related value. This vehicle control system comprises a steering wheel, a driving force control mechanism to control a driving force of a vehicle, and a power-train control module to control the driving force control mechanism. The power-train control module is operable, upon an increase in steering angle, to control an engine to reduce an output torque of the engine and, when a reversal of yaw rate of the vehicle is repeated in a situation where the vehicle is performing a towing operation, to restrict the output torque reduction based on the increase in the steering angle.

First claim

The invention claimed is:

1. A vehicle control system comprising:
a steering device;
a driving force control mechanism configured to control a driving force of a vehicle; and
a processor configured to control the driving force control mechanism, wherein the processor is configured:
to control the driving force control mechanism to reduce the driving force of the vehicle, when a steering angle-related value related to a steering angle of the steering device increases; and
to restrict a reduction of the driving force based on an increase in the steering angle-related value, when a reversal of a yaw rate of the vehicle is repeated in a situation where the vehicle performs a towing operation;
wherein when a cycle period of the reversal of the yaw rate of the vehicle is equal to or less than a given value, the processor is configured to restrict the reduction of the driving force based on the increase in the steering angle-related value.

2. The vehicle control system according to claim 1 , wherein, when an amplitude of the reversal of the yaw rate of the vehicle is equal to or greater than a given value, the processor is configured to restrict the reduction of the driving force based on the increase in the steering angle-related value.

3. The vehicle control system according to claim 2 , wherein, when the reversal of the yaw rate of the vehicle is repeated in the situation where the vehicle performs the towing operation, the processor is configured to control a brake device of the vehicle, thereby suppressing the reversal of the yaw rate of the vehicle.

4. The vehicle control system according to claim 3 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

5. The vehicle control system according to claim 2 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

6. The vehicle control system according to claim 1 , wherein, when the reversal of the yaw rate of the vehicle is repeated in the situation where the vehicle performs the towing operation, the processor is configured to control a brake device of the vehicle, thereby suppressing the reversal of the yaw rate of the vehicle.

7. The vehicle control system according to claim 6 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

8. The vehicle control system according to claim 1 , wherein, when a repetition of the reversal of the yaw rate of the vehicle occurs in a situation where the driving force control mechanism is being controlled to reduce the driving force of the vehicle based on the increase in the steering angle-related value, the processor is configured to continue the reduction of the driving force based on the increase in the steering angle-related value.

9. The vehicle control system according to claim 8 , wherein, when the repetition of the reversal of the yaw rate of the vehicle occurs in a situation where an amount of the driving force of the vehicle to be reduced based on the increase in the steering angle-related value is equal to or greater than a given value, the processor is configured to continue the reduction of the driving force based on the increase in the steering angle-related value.

10. The vehicle control system according to claim 9 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

11. The vehicle control system according to claim 8 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

12. The vehicle control system according to claim 1 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

13. The vehicle control system according to claim 1 , wherein, when the reversal of the yaw rate of the vehicle is repeated in the situation where the vehicle performs the towing operation, the processor is configured to control a brake device of the vehicle, thereby suppressing the reversal of the yaw rate of the vehicle.

14. The vehicle control system according to claim 13 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

15. The vehicle control system according to claim 1 , wherein, when the reduction of the driving force based on the increase in the steering angle-related value is restricted, the processor is configured to continue a restriction on the reduction of the driving force based on the increase in the steering angle-related value until a vehicle speed becomes a given value or less.

Assignees

• Mazda Motor

Inventors

• Ogawa Daisaku
• Umetsu Daisuke
• Kishimura Setsuya

Classifications

• B60W10/20

  including control of steering systems · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• B60W10/04

  including control of propulsion units · CPC title

• B60W10/18

  including control of braking systems · CPC title

• B60T8/1755

  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