Antiskid control with surface friction compensation by prolonged down-pressure operation
August 8, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3804469 Skid control system Anti-wheel lock system Anti-skid brake control system Skid control method Vehicle skid control Method and apparatus for anti-skid brake control of an automotive vehicle Antiskid brake controlling method and apparatus for vehicles Skid control system Method of preventing skid of wheels of a vehicle InventorsAssigneeApplicationNo. 06/638722 filed on 08/08/1984US Classes:701/75, Correction or modification303/165Variable target slip valuesExaminersPrimary: Gruber, Felix D.Attorney, Agent or FirmInternational ClassesB60T 8/88 (20060101)B60T 8/172 (20060101) B60T 8/1761 (20060101) B60T 8/17 (20060101) Foreign Application Priority Data1983-08-09 JPAbstractIn an antiskid control system for a motor vehicle, the speed and acceleration of at least one vehicle wheel are detected, and from the detected wheel speed, the speed of the vehicle is estimated. First and second variable threshold values are derived from the vehicle speed. The wheel speed and acceleration are compared with the first and second thresholds, respectively, to estimate the level of road surface friction and to operate solenoid-operated hydraulic brake pressure decreasing means. The operating period of the pressure decreasing means is controlled in accordance with the estimated road surface friction to prevent excessive reduction of the brake pressure and premature locking of the wheels. | |
