VEHICLE ATTITUDE CONTROL SYSTEM

• US 20130090810A1
• Filed: 09/28/2012
• Published: 04/11/2013
• Est. Priority Date: 10/06/2011
• Status: Active Grant

• Current Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Original Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Inventors: YOSHIMOTO, Hiroshi, KIMURA, Shuuji, HIGASHI, Masayasu
• Granted Patent: US 8,977,434 B2
• Time in Patent Office: Days
• US Class Current: 701/41
• CPC Class Codes: B60T 2201/16 Curve braking control, e.g. turn control within ABS control algorithm
• CPC Class Codes: B60T 2230/02 Side slip angle, attitude angle, floating angle, drift angle
• CPC Class Codes: B60T 8/17552 responsive to the tire sideslip angle or the vehicle body slip angle

Abstract

A target sideslip angle computing unit calculates a target sideslip angle used when a vehicle makes a turn, based on a steering angle and a vehicle speed. A target sideslip angle correcting unit corrects the target sideslip angle calculated by the target sideslip angle computing unit using a sideslip angle correction amount calculated based on at least one of a steering angular velocity, a depression amount of an accelerator pedal, a depression velocity of the accelerator pedal and a depression amount of a brake pedal. Vehicle attitude control is executed using the target sideslip angle corrected by the target sideslip angle correcting unit.

Claims

1. A vehicle attitude control system, comprising:

a target sideslip angle computing unit that calculates a target sideslip angle used when a vehicle makes a turn, based on a steering angle and a vehicle speed;

a target sideslip angle correcting unit that corrects the target sideslip angle calculated by the target sideslip angle computing unit, using a sideslip angle correction amount calculated based on at least one of a steering angular velocity, a depression amount of an accelerator pedal, a depression velocity of the accelerator pedal and a depression amount of a brake pedal; and

an attitude control unit that executes vehicle attitude control using the target sideslip angle corrected by the target sideslip angle correcting unit.

2. The vehicle attitude control system according to claim 1, further comprising:

a sensor that detects a turning direction of the vehicle, wherein

the sideslip angle correction amount calculated by the target sideslip angle correcting unit based on at least one of the depression amount of the accelerator pedal, the depression velocity of the accelerator pedal and the depression amount of the brake pedal has a sign that varies depending on the turning direction of the vehicle.

3. The vehicle attitude control system according to claim 1, wherein

the target sideslip angle correcting unit calculates the sideslip angle correction amount only when an absolute value of the steering angular velocity exceeds a predetermined threshold.

4. The vehicle attitude control system according to claim 1, wherein

the target sideslip angle correcting unit calculates the sideslip angle correction amount only when the depression amount of the accelerator pedal exceeds a predetermined threshold.

5. The vehicle attitude control system according to claim 1, wherein

the target sideslip angle correcting unit calculates the sideslip angle correction amount only when an absolute value of the depression velocity of the accelerator pedal exceeds a predetermined threshold.

6. The vehicle attitude control system according to claim 1, wherein

the target sideslip angle correcting unit calculates the sideslip angle correction amount only when the depression amount of the brake pedal exceeds a first predetermined threshold.

7. The vehicle attitude control system according to claim 1, wherein

the target sideslip angle correcting unit calculates the sideslip angle correction amount only when the depression amount of the brake pedal falls within a range from a first predetermined threshold to a second predetermined threshold.

8. The vehicle attitude control system according to claim 1, wherein

the attitude control unit controls brake pressures for four wheels based on the target sideslip angle.