Method in Order to Control Vehicle Behaviour
3 Assignments
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Accused Products
Abstract
A method in controlling a steering assistance actuator in a steering system (100) of a vehicle and one or more controllable vehicle state actuators so that the steering-wheel torque applied by the driver is an indicative for the driver intention and transformed to a target yaw and/or lateral vehicle state to be controlled by one or more vehicle state controllers and actuated by the vehicle state actuators along with the fact that the level of understeer is used to achieve an additional steering-wheel torque in the form of a ramp in the steering-wheel torque as a function of the level of understeer.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. A method of controlling a steering system of a vehicle and at least one controllable vehicle state actuators of the vehicle, the steering system having a base steering-wheel torque and a steering assistance actuator, the method comprising:
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generating at least two input signals with respective sensors, wherein the sensors include a torsion-bar torque sensor, a steering-wheel angle sensor, vehicle wheel-speed sensors, and a vehicle yaw-rate sensor; determining a level of vehicle understeer based on the at least two input signals; determining a steering-wheel torque ramp based on the level of vehicle understeer; determining, from at least one of the at least two input signals, a measure of a torque applied by a vehicle driver via a steering wheel; controlling the steering assistance actuator based on a reference signal based on a sum of the steering-wheel torque ramp and the base steering-wheel torque, thereby preventing the vehicle driver from excessive steering; determining a target yaw and/or lateral vehicle state based on the measure of the torque applied by the vehicle driver via the steering wheel; and determining a reference signal for at least one of the controllable vehicle state actuators based on the target yaw and/or lateral vehicle state to control a path of the vehicle, whereby tire-to-road friction and vehicle yaw and/or lateral vehicle state are controlled. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification