Method of enhancing the reliablity in operation of a brake system with electronic control of the brake force distribution
First Claim
1. A method for enhancing the reliability of a brake system with electronic brake force distribution control for an automotive vehicle having front wheels and rear wheels and front wheel brakes and rear wheel brakes, respectively associated with said front wheels and said rear wheels, said method comprising the steps of:
- generating a front wheel slip and a rear wheel slip;
determining a difference between said front wheel slip and said rear wheel slip;
limiting brake pressure rise in said rear wheel brakes when said difference exceeds a slip difference threshold;
varying the pressure introduced into said front wheel brakes;
sensing the wheel rotational behavior of said front wheels in response to the step of varying the pressure introduced into said front wheel brakes and identifying an error; and
at least minimizing, upon identification of an error, the effect of the step of limiting brake pressure rise in said rear wheel brakes.
1 Assignment
0 Petitions
Accused Products
Abstract
To enhance the reliability of a brake system with electronic control of the brake force distribution, a short pressure reduction pulse, which is negligible for the braking process, is applied to the front wheels (VR, VL) during a braking operation, and the reaction of the front wheels to the pressure reduction pulse is sensed. If imbalance of the front-wheel brakes or a defect is concluded from the reaction, the limitation of the pressure rise in the wheel brakes of the rear wheels (HR, HL), which is an effect of the brake force distribution control, is minimized or eliminated. Thus, the rear wheels provide an increased contribution to the braking process in this situation.
28 Citations
11 Claims
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1. A method for enhancing the reliability of a brake system with electronic brake force distribution control for an automotive vehicle having front wheels and rear wheels and front wheel brakes and rear wheel brakes, respectively associated with said front wheels and said rear wheels, said method comprising the steps of:
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generating a front wheel slip and a rear wheel slip; determining a difference between said front wheel slip and said rear wheel slip; limiting brake pressure rise in said rear wheel brakes when said difference exceeds a slip difference threshold; varying the pressure introduced into said front wheel brakes; sensing the wheel rotational behavior of said front wheels in response to the step of varying the pressure introduced into said front wheel brakes and identifying an error; and at least minimizing, upon identification of an error, the effect of the step of limiting brake pressure rise in said rear wheel brakes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification