Yaw Stability Control System
First Claim
1. A method for controlling a yaw stability control system for a vehicle having an electric power assisted steering system, the method comprising the steps of:
- detecting understeer;
determining a degree of understeer;
comparing the degree of understeer to a predetermined threshold value;
calculating a guidance torque;
calculating a steering wheel angle modifier upon initiation of calculating a guidance torque;
applying the guidance torque to the power assisted steering system;
calculating a driver intended steering wheel angle using a measured steering wheel angle and the calculating steering wheel angle modifier;
applying the driver intended steering wheel angle as an input for the yaw stability control system.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates is a yaw stability control system for a vehicle using a steering system and a method of controlling by detecting the occurrence of understeer, determining the degree of understeer after the occurrence of understeer is detected determining if the determined degree of understeer exceeds a threshold value, saving the steering wheel torque value and steering wheel angle value when determined that a calculated drop in steering wheel torque exceeds the threshold value, calculating a guidance torque, a driver-intended steering wheel angle, and updating the steering wheel angle at the start of the guidance torque calculation, applying the guidance torque to the steering of the vehicle, and using the driver-intended steering wheel angle for yaw stability control.
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Citations
21 Claims
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1. A method for controlling a yaw stability control system for a vehicle having an electric power assisted steering system, the method comprising the steps of:
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detecting understeer; determining a degree of understeer; comparing the degree of understeer to a predetermined threshold value; calculating a guidance torque; calculating a steering wheel angle modifier upon initiation of calculating a guidance torque; applying the guidance torque to the power assisted steering system; calculating a driver intended steering wheel angle using a measured steering wheel angle and the calculating steering wheel angle modifier; applying the driver intended steering wheel angle as an input for the yaw stability control system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of controlling a yaw stability control system for a vehicle having an electric power assisted steering system, the method comprising the steps of:
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determining the occurrence of understeer; determining the degree of understeer after the occurrence of understeer is determined; determining if the determined degree of understeer exceeds a threshold value; saving the steering wheel torque value and steering wheel angle value when determined that the determined degree of understeer exceeds the threshold value; calculating a guidance steering wheel torque and steering wheel angle modifier and updating the steering wheel angle at the start of guidance steering wheel torque calculation; applying the calculated guidance steering wheel torque to the steering of the vehicle; and calculating a driver intended steering wheel angle using the steering wheel angle modifier; controlling yaw stability using the driver intended steering wheel angle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification