Method of controlling anti-lock brake system for vehicles and method of finding control point in ABS
First Claim
1. A method of controlling an anti-lock brake system for vehicles wherein when a vehicle having an anti-lock brake system mounted thereon has emergency brake applied thereto, a change in road surface friction force or road surface friction coefficient due to the increased brake pressure is detected by a road surface friction force detecting device or a road surface friction coefficient detecting device, said method being characterized in that to decide the optimum control start point concomitant with the increase of the signal value of road surface friction force F or road surface friction coefficient μ
- detected by the road surface friction force detecting device or road surface friction coefficient detecting device, use is made of means for eliminating disturbance sources which impede such decision.
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Abstract
In an anti-lock brake system mounted on a vehicle wherein when the vehicle is braked in an emergency during running, an increase in the road surface friction force or road surface friction coefficient owing to an increase in the brake pressure is detected by a road surface friction force detecting device or road surface friction coefficient detecting device. The optimum control start point associated with an increase in the signal value of the road surface friction force F or road surface friction coefficient μ provided by the road surface friction force detecting device or road surface friction coefficient detecting device is decided by using a decrease in the wheel speed, i.e., by using the wheel speed ω or dω/dt. Thereafter, from the point where the specified value of control based on F or μ, or dF/dt or dμ/dt, the brake pressure is moved from the pressure increasing mode to the pressure retaining or decreasing mode.
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Citations
1 Claim
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1. A method of controlling an anti-lock brake system for vehicles wherein when a vehicle having an anti-lock brake system mounted thereon has emergency brake applied thereto, a change in road surface friction force or road surface friction coefficient due to the increased brake pressure is detected by a road surface friction force detecting device or a road surface friction coefficient detecting device,
said method being characterized in that to decide the optimum control start point concomitant with the increase of the signal value of road surface friction force F or road surface friction coefficient μ - detected by the road surface friction force detecting device or road surface friction coefficient detecting device, use is made of means for eliminating disturbance sources which impede such decision.
Specification