Adaptive braking modulator with electrically activated relay valve
US4068902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Nov 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86919
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electrically actuated relay valve or adaptive braking modulator for a vehicle fluid pressure braking system includes a housing having a fluid pressure inlet, a pair of vents communicating with the ambient atmosphere, and a brake application effecting mechanism. The inlet communicates with a chamber defined within the modulator, amd this chamber is in turn communicated to the brake application effecting mechanism. An electrically actuated valve controls communication from the inlet into the chamber, and is shiftable from a first condition permitting substantially uninhibited communication from the inlet to the chamber to a second condition communicating the chamber to one of the vents when an incipient skidding condition is detected. A pressure differential responsive valve element controls communication between the chamber, the brake application effecting mechanism, and the other vent. When the pressure level in the brake application effecting mechanism is greater than the pressure level in the chamber, the pressure differential responsive valve element communicates the brake application effecting mechanism to the other vent. However, when the electrically actuated valve is not …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.