Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2002-11-26
2004-11-16
Nguyen, Tan Q. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S069000, C701S078000, C701S081000
Reexamination Certificate
active
06819998
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to a vehicle, and more particularly to a method and apparatus for stabilizing the vehicle using a vehicle stability enhancement (VSE) system.
BACKGROUND
Traditional vehicle chassis subsystems, such as steering, braking and suspension subsystems, are passive, meaning that their responsiveness under operating conditions is determined prior to the vehicle leaving the point of manufacture. Advances in braking system technology have led to differential braking using vehicle yaw-rate feedback. Such advances have been incorporated into vehicle stability enhancement systems, whereby an onboard controller monitors the vehicle yaw rate, determines an appropriate control command to improve vehicle directional stability, and effectuates actuation of appropriate braking mechanisms to create a corrective yaw moment. Such vehicle stability enhancement systems typically employ control algorithms based on level ground situations.
SUMMARY
In one embodiment, a vehicle stability enhancement system for a vehicle having at least one vehicle subsystem includes a sensor for sensing a vehicle parameter, a vehicle control system for adjusting the vehicle subsystem, a memory having a register including a bank angle compensation control command, and a controller responsive to the sensor and memory for controlling the vehicle control system.
In another embodiment, a method for controlling a vehicle stability enhancement system in a vehicle having a vehicle subsystem includes sensing a vehicle parameter, determining a control gain factor in response to the vehicle parameter, determining the state of a control flag in response to the vehicle parameter, calculating a control command in response to the control gain factor and the control flag, wherein the control command includes a bank angle compensation control command, and actuating a vehicle control system in response to the control command for adjusting the vehicle subsystem.
REFERENCES:
patent: 5508921 (1996-04-01), Chikuma et al.
patent: 5524079 (1996-06-01), Ishida et al.
patent: 5606502 (1997-02-01), Adachi et al.
patent: 5720533 (1998-02-01), Pastor et al.
patent: 5746486 (1998-05-01), Paul et al.
patent: 5813732 (1998-09-01), Monzaki et al.
patent: 6041886 (2000-03-01), Nakaishi et al.
patent: 6112147 (2000-08-01), Ghoneim et al.
patent: 6125319 (2000-09-01), Hac et al.
patent: 6161905 (2000-12-01), Hac et al.
patent: 6169951 (2001-01-01), Ghoneim et al.
patent: 6175790 (2001-01-01), Lin et al.
patent: 6195606 (2001-02-01), Barta et al.
patent: 6205391 (2001-03-01), Ghoneim et al.
patent: 6453226 (2002-09-01), Hac et al.
patent: 6505108 (2003-01-01), Bodie et al.
patent: 6546324 (2003-04-01), Chen et al.
patent: 6547343 (2003-04-01), Hac
patent: 6622073 (2003-09-01), Tanaka et al.
Furukawa, Yoshimi et al., “A Review of Four-Wheel Steering Studies from the Viewpoint of Vehicle Dynamics and Control”, 1989, pp. 151-186, month is not available.
Whitehead, John C., “Response and Stability of Rear Wheel Steering Vehicles”, Nov. 1988, pp. 1-7.
Chen Shih-Ken
Lin William C.
General Motors Corporation
Marra Kathryn A.
Nguyen Tan Q.
LandOfFree
Method and apparatus for vehicle stability enhancement system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for vehicle stability enhancement system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for vehicle stability enhancement system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3353249