Method of skid dection without speed sensors
US5236252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Dec 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of controlling the operation of a vehicle brake system, the brake system including a master cylinder controlled by the operator of the vehicle to vary applied brake pressure to various brake mechanisms during normal service brake operation and an antiskid brake subsystem, activated when one or more vehicle wheels are skidding, for controlling brake pressure in the various brake mechanisms to permit various wheels to operate in a nonskidding manner. The method comprising the steps of: 1) determining and storing a control relationship which relates changes in vehicle deceleration and changes in applied brake pressure, with none of the wheels of the vehicle skidding, 2) subsequently measuring at least two values (P.sub.1 P.sub.2) of applied brake pressure to determine changes in applied brake pressure .DELTA.P during a measurement interval and calculating the change in control deceleration .DELTA.D.sub.ci corresponding to the change .DELTA.P in applied brake pressure utilizing the control relationship; directly measuring actual vehicle deceleration D.sub.i ; determining a change in actual vehicle deceleration .DELTA.D.sub.i corresponding to the change in applied brake pressur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.