Brake control system for vehicles
US4555766A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1981 |
| Grant date | Nov 26, 1985 |
| Priority date | — |
| Expiry date | Oct 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A microprocessor having input fluid brake control apparatus and output fluid brake application apparatus is provided wherein the output fluid brake application apparatus comprises a digital signal characteristic of a desired fluid braking pressure. The brake application apparatus comprises an improved fluid pressure regulator having a fluid pressure chamber for developing and maintaining a regulated braking fluid pressure. The improved regulator has valves selectively operable to brake application, release, and lap positions for selectively governing regulated fluid pressure in a braking device and in the fluid pressure chamber. A digital linear actuator having an axially operable shaft responsive to the digital signal is provided to actuate the valves alternately to application and release positions, the actuator being secured to a piston subject to pressure in the fluid pressure chamber on one side thereof and subject to pressure of a metering spring on the other side thereof. The valves are governed by a spool that is linearly actuated by the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.