Vehicle roll control method using controllable friction force of MR dampers
First Claim
Patent Images
1. A roll control system for a vehicle, said system comprising:
- a lateral acceleration sensor for determining the lateral acceleration of the vehicle and providing a lateral acceleration signal;
a speed sensor for determining the speed of the vehicle and providing a vehicle speed signal;
a sensor for measuring a steering angle of the vehicle and providing a steering angle signal;
a damper with controllable friction force provided at each wheel of the vehicle; and
a controller for reducing the roll motion of the vehicle when it is turning by controlling the friction response of one or more of the wheel dampers, said controller receiving the lateral acceleration signal, the vehicle speed signal and the steering angle signal, and calculating a friction control signal that includes calculating a first current control signal based on the lateral acceleration signal and a second current control signal based on the steering angle signal, wherein the controller models the roll motion of the vehicle as a one degree-of-freedom dynamic model.
12 Assignments
0 Petitions
Accused Products
Abstract
A system for providing vehicle roll control that controls the friction-force of dampers provided at the wheels of the vehicle. The system includes a lateral acceleration sensor for determining the lateral acceleration of the vehicle, a steering angle sensor for determining the steering angle of the vehicle and a speed sensor for determining the speed of the vehicle. The system calculates a current control signal for one or more of the dampers based on the lateral acceleration and/or the steering angle, and uses one or both of the current control signals to control the friction-force of the inside, outside or both of the dampers.
-
Citations
12 Claims
-
1. A roll control system for a vehicle, said system comprising:
-
a lateral acceleration sensor for determining the lateral acceleration of the vehicle and providing a lateral acceleration signal; a speed sensor for determining the speed of the vehicle and providing a vehicle speed signal; a sensor for measuring a steering angle of the vehicle and providing a steering angle signal; a damper with controllable friction force provided at each wheel of the vehicle; and a controller for reducing the roll motion of the vehicle when it is turning by controlling the friction response of one or more of the wheel dampers, said controller receiving the lateral acceleration signal, the vehicle speed signal and the steering angle signal, and calculating a friction control signal that includes calculating a first current control signal based on the lateral acceleration signal and a second current control signal based on the steering angle signal, wherein the controller models the roll motion of the vehicle as a one degree-of-freedom dynamic model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A roll control system for a vehicle, said system comprising:
-
a damper with controllable friction force provided at each wheel of the vehicle, said dampers being used for vehicle ride purposes; and a controller for selectively providing a current control signal to one or more of the dampers with controllable friction force in response to lateral acceleration of the vehicle so as to reduce the roll motion of the vehicle wherein the controller uses a vehicle lateral acceleration signal for determining the current control signal for the dampers, wherein the controller uses a steering angle signal of the vehicle in combination with a one degree-of-freedom model to determine the current control signal applied to the dampers, and wherein the controller provides the current control signal to a front and rear damper on an inside of the vehicle relative to a turn or to a front and rear damper on an outside of the vehicle relative to a turn. - View Dependent Claims (10, 11)
-
-
12. A roll control system for a vehicle, said system comprising:
-
a damper with controllable friction force provided at each wheel of the vehicle, said dampers being used for vehicle ride purposes; and a controller for selectively providing a current control signal to one or more of the dampers with controllable friction force in response to lateral acceleration of the vehicle so as to reduce the roll motion of the vehicle wherein the controller uses a vehicle lateral acceleration signal for determining the current control signal for the dampers, wherein the controller provides different control signals to the dampers at the front and rear wheels of the vehicle depending on the weight distribution in the vehicle.
-
Specification