Hydraulic brake system for automotive vehicles
US4815793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/145
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic brake system for automotive vehicles has a master brake cylinder (1) operable by a brake pedal, wheel brakes (VL, HR, VR, HL) being connected to said master brake cylinder via brake lines (11, 12), and a hydraulic power booster (22) supplied by a pressure medium source (42) and connected between the brake pedal and the master brake cylinder (1) so as to boost the actuating force. The booster has a booster piston (27) in a booster chamber (28) and the pressurization of said booster piston is controllable by the brake pedal via a control piston (30). For controlling the brake system by means of a brake slip control device the connection from the brake lines (11, 12) to the wheel brakes can be blocked by solenoid valves (13-16). The booster piston (27) is connected with a resetting piston which, for pushing the booster piston back into its rest position, is pressurizable via a resetting valve (46, 53) controllable by the brake slip control device. For brake slip control the master cylinder ( 1) is actuatable intermittently by means of a drive piston (39), with the booster piston moved back. The actuating movement of said drive piston is controllable by the brake slip contr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.