VEHICLE TURNING CONTROL SYSTEM

• US 20150175196A1
• Filed: 12/18/2014
• Published: 06/25/2015
• Est. Priority Date: 12/24/2013
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: OHMURA, Kazutaka, KOJIMA, Takeshi, FUTAMURA, Tomoyuki
• Granted Patent: US 9,487,232 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60T 2270/303 Stability control with active acceleration
• CPC Class Codes: B60T 8/1755 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 Class Codes: B62D 6/003 in order to control vehicle yaw movement, i.e. around a vertical axis B62D6/007 takes precedence

Abstract

An object of the present invention is to provide a vehicle turning control system capable of maintaining stability of a vehicle, even in a case where a mode of output characteristics of a power plant for the vehicle is switched by a driver'"'"'s operation. In a running mode in which output characteristics of an engine is higher, the vehicle turning control system increases a control gain of a feedforward control unit for performing yaw moment control of the vehicle by feedforward control, and decreases a control gain of a feedback control unit for performing yaw moment control of the vehicle by feedback control. A control gain of vehicle behavior stabilization control performed by the vehicle behavior stabilization control unit is controlled commonly regardless of the running mode.

Claims

1. A vehicle turning control system comprising:

a yaw moment control unit for performing yaw moment control of a vehicle in accordance with a steering amount of the vehicle; and

a switching unit for switching output characteristics of a power plant for the vehicle to a plurality of modes by a driver'"'"'s operation,

wherein the yaw moment control unit changes a control gain of the yaw moment control in accordance with which of the plurality of modes is selected.

2. The vehicle turning control system according to claim 1,

wherein the yaw moment control unit includes a feedforward control unit for performing yaw moment control of the vehicle by feedforward control in accordance with the steering amount of the vehicle, and

wherein the feedforward control unit increases a control gain of the feedforward control in a mode where the output characteristics of the power plant is higher than that of other modes among the plurality of modes.

3. The vehicle turning control system according to claim 1,

wherein the yaw moment control unit includes a feedback control unit for performing yaw moment control of the vehicle by feedback control in accordance with the steering amount of the vehicle, and

wherein the feedback control unit decreases a control gain of the feedback control in a mode where the output characteristics of the power plant is higher than that of other modes among the plurality of modes.

4. The vehicle turning control system according to claim 2,

wherein the switching unit includes, as the plurality of modes, a first mode, a second mode, and a third mode, in which the output characteristics of the power plant for the vehicle is increased in this order, and

wherein the feedforward control unit increases the control gain in the order of the first mode, the second mode, and the third mode.

5. The vehicle turning control system according to claim 3,

wherein the switching unit includes, as the plurality of modes, a first mode, a second mode, and a third mode, in which the output characteristics of the power plant for the vehicle is increased in this order, and

wherein the feedback control unit decreases the control gain in the order of the first mode, the second mode, and the third mode.

6. The vehicle turning control system according to claim 2, further comprising

a vehicle behavior stabilization control unit for performing a control to stabilize the vehicle behavior based on a difference between an actual yaw rate of the vehicle and a target yaw rate of the vehicle after the feedforward control,

wherein the vehicle behavior stabilization control unit changes the control gain commonly regardless of the mode.

7. The vehicle turning control system according to claim 3, further comprising

a vehicle behavior stabilization control unit for performing a control to stabilize the vehicle behavior based on a difference between an actual yaw rate of the vehicle and a target yaw rate of the vehicle after the feedback control,

wherein the vehicle behavior stabilization control unit changes the control gain commonly regardless of the mode.

8. The vehicle turning control system according to claim 3, wherein in a vehicle behavior stabilization control unit, a change of control gain of a vehicle behavior stabilization control between a time of transition to the vehicle behavior stabilization control from the yaw moment control by the feedback control of the first mode and a time of transition to the vehicle behavior stabilization control from the yaw moment control by the feedback control of the second mode, is slower than a change of control gain of the vehicle behavior stabilization control between a time of transition to the vehicle behavior stabilization control from the yaw moment control by the feedback control of the second mode and a time of transition to the vehicle behavior stabilization control from the yaw moment control by the feedback control of the third mode.

9. The vehicle turning control system according to claim 2, wherein a braking force by the feedforward control unit is smaller than a braking force by the vehicle behavior stabilization control unit.

10. The vehicle turning control system according to claim 3, wherein a braking force by the feedback control unit is smaller than a braking force by the vehicle behavior stabilization control unit.