Vehicle brake apparatus
US8991941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Feb 26, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/221
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle brake apparatus in which a self-locked state of a cut-off valve is quickly relieved if the valve becomes stuck in the self-locked state. The vehicle brake apparatus comprises a master cylinder to have wheel cylinders generate a braking force, master cut-off valves of a normally open type, a slave cylinder electrically driven to apply a braking force to the wheel cylinders. The apparatus also includes pressure sensors for detecting brake fluid pressures generated by the master cylinder and the slave cylinder, and out-valves through which the brake fluid pressure on the wheel cylinders is reduced. If the brake fluid pressure corresponding to a depressing stroke of a brake pedal becomes higher than a valve openable pressure on the master cut-off valves while the brake pedal is being operated, the brake fluid pressure on the wheel cylinders is reduced through the out-valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.