Brake booster system
US5947566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Aug 12, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/4872
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a brake booster system of the present invention, just after a MCY produces MCY pressure Pi according to the pedal pressure of a brake pedal, a valve piston of a pressure-intensifying valve moves so that a valve portion is seated in a rubber valve seat. In addition, a pedal switch detects the pedaling of the brake pedal to drive a motor and a pressure-intensifying pump. Therefore, W/C pressure Po of a W/C is intensified by the discharge pressure of the pressure-intensifying pump. The intensified W/C pressure Po causes the upward movement of a stepped piston of a pedal stroke shortening cylinder. The brake fluid is transferred toward the MCY corresponding to the movement of the stepped piston, thereby restricting the stroke of the piston of the MCY and thus shortening the pedal stroke of the brake pedal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.