Vehicle brake device and vehicle brake device control method
US8827377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2011 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Sep 6, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/404
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a BBW type brake device, if a slave cylinder becomes inoperable, when a master cylinder is operated for the first time, a master cut valve is opened to charge brake fluid into a reservoir of a hydraulic modulator, and since the brake fluid charged into the reservoir is increased in pressure by driving a hydraulic pump when the master cut valve is closed, wheel cylinders are operated. Since the amount of brake fluid on the downstream side relative to the master cut valve is increased by charging the reservoir with brake fluid, it is possible to increase the pressure of the brake fluid of the reservoir by driving the hydraulic pump and generate brake fluid pressure by a hydraulic modulator that is higher than the brake fluid pressure generated by the master cylinder, thereby generating sufficient braking force without increasing the depressing force applied to a brake pedal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.