VEHICLE BEHAVIOR CONTROL DEVICE

• US 20170129482A1
• Filed: 11/03/2016
• Published: 05/11/2017
• Est. Priority Date: 11/06/2015
• Status: Active Application

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: SUNAHARA, Osamu, UMETSU, Daisuke
• Granted Patent: US 10,266,173 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2710/1055 Output torque change rate
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: B60W 30/18145 Cornering

Abstract

The vehicle behavior control device is designed to control a behavior of a vehicle having steerable front road wheels. The vehicle behavior control device comprises a PCM configured to perform control to reduce a driving force for the vehicle according to a steering speed of the vehicle, wherein the PCM is operable to reduce a change rate during increasing of a reduction amount of the driving force according to the steering speed of the vehicle, to a smaller value, as a steering wheel angle of the vehicle becomes larger.

Claims

1. A vehicle behavior control device for controlling a behavior of a vehicle having steerable front road wheels, comprising driving force control means configured to perform control to reduce a driving force for the vehicle according to a yaw rate-related quantity which is related to a yaw rate of the vehicle, wherein the driving force control means is operable to reduce a change rate during increasing of a reduction amount of the driving force according to the yaw rate-related quantity of the vehicle, to a smaller value, as a steering wheel angle of a steering wheel the vehicle becomes larger.

2. The vehicle behavior control device as recited in claim 1, wherein the driving force control means is operable, when the steering wheel angle is increasing, to reduce the driving force according to the yaw rate-related quantity.

3. The vehicle behavior control device as recited in claim 1, wherein the driving force control means is operable to decide a target additional deceleration to be added to the vehicle, according to the yaw rate-related quantity of the vehicle, and reduce the driving force for the vehicle so as to realize the target additional deceleration, and to reduce a change rate during increasing of the target additional deceleration, to a smaller value, as the steering wheel angle becomes larger.

4. A vehicle control device comprising a controller to which at least a steering wheel angle, an accelerator position and a vehicle speed are input, and which is configured to control a driving force output from a driving force generator based on the steering wheel angle, the accelerator position and the vehicle speed, wherein the controller is configured to:

decide a target additional deceleration to be added to the vehicle according to steering speed, with reference to a map defining the additional deceleration to be set according to the steering speed, and reduce the driving force so as to increase the additional deceleration to the decided target additional deceleration at an increase rate set to equal to or less than a given maximum increase rate based on a gain according to the steering wheel angle, with reference to a map defining the gain to be set according to the steering wheel angle, when the steering wheel angle is increasing and the steering speed is not decreasing;

reduce the driving force so as to generate the additional deceleration at the maximum steering speed when the steering wheel angle is increasing and the steering speed is decreasing;

increase the driving force so as to reduce the additional deceleration when the steering wheel angle is not increasing.