Braking pressure control device for a hydraulic automotive vehicle brake system
US5302011A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Jun 12, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A braking pressure control device for a brake system comprising a braking pressure generator (16), a wheel brake cylinder connected via a brake line (15) with the latter to actuate a brake (18), a braking pressure control circuit which is interposed into the brake line and comprising a piston pump, the outlet valve (9) of which is connectible to the brake line (15), and comprising solenoid operated brake control valves (19, 20), the inlet valve (8) and the outlet valve (9) of the piston pump are arranged on the pump housing (1), and the difference in pressure for opening the inlet valve (8) is such that the inlet valve (8) remains closed whenever the pressure in the return line (21) is below atmospheric pressure. An annular chamber (11) encircling the piston (3) is provided on the side of the slide seal (12) remote from the working chamber (7) of the piston pump, the annular chamber being sealed in relation to the eccentric piston drive housing portion ( 4) and communicating with a pump supply line connected to the brake pressure line (15), or with the return line (21) so as to supplied with fluid and prevent air from entering the working chamber through the piston clearance space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.