Hydraulic brake system
US6554372B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Dec 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/11
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake system (10) having a brake booster (12) that is responsive to an operator brake input for providing a first input force to a master cylinder (13) to develop a first brake application and is responsive to a hydraulic input for providing a second input force to a master cylinder (13) to develop a second brake application. An electronic control unit (ECU) (40) receives first input signals from sensors (19) indicative of a speed for each wheel (14,14′,18,18′) in a brake system of the vehicle. The ECU (40) supplies a pump (42) with an operational input signal when a sensed wheel speed indicates a wheel lock may occur between a wheel and a surface during a brake application and simultaneous activates a decay valve (17) to release pressurized fluid from actuation of the wheel brake associated with the wheel. When the sensed condition is obviated, the ECU (40) supplies a signal to close the decay valve (17) and open a build valve (15) to provide secondary pressurized fluid from a pump (42) to the wheel brake to resume and complete the first brake application. The ECU (40) also receives an input from a pressure sensor (52) associated to with an accumulator (22) and when …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.