Anti-skid control system for motor vehicle
US4741580A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jul 30, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/5006
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In an anti-skid control system for a motor vehicle, brake fluid pressure reduction-control mode and brake fluid pressure buildup-control mode occurs cyclically; in the reduction-control mode, reduction of the brake fluid pressure is started on the basis of detection of an abrupt drop in wheel speed which occurs when the wheel is braked; and in buildup-control mode, a valve is repetitively opened and closed so that brake fluid pressure buildup and holding operations are performed alternatley and repetitively, whereby the brake fluid pressure is caused to build up gradually. The length of time period for the first buildup operation in the buildup-control mode is determined on the basis of variation in the wheel speed occurring between a low peak point and a high peak point; and the length of time period for at least one of each pressure holding operation and each of the second and succeeding pressure buildup operations in the abovementioned buildup-control mode, is determined on the basis of variation in the wheel speed occurring immediately before the pressure holding or buildup operation is started.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.