Automotive anti-lock brake control system
US4778222A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 5, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jan 5, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/348
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An automotive anti-lock brake control system includes first and second directional control valves selectively shiftable between a first position in which a master cylinder communicates with first and second wheel cylinders associated with front and rear wheels, respectively, and a second position in which the first and second wheel cylinders communicate with a reservoir. A proportional valve is disposed between the master cylinder and the second directional control valve for producing a fluid pressure difference between the first and second wheel cylinders. The brake fluid stored in the reservoir is pumped by a fluid pump back to a pipe portion between the master cylinder and the proportional valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.