Brake fluid pressure maintaining apparatus for vehicles
US7299904B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Nov 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2201/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake fluid pressure maintaining apparatus for a vehicle, having: a master cylinder; a check valve; and, a normally-open-type electromagnetic valve including an electromagnetic coil, a fixed core, and a movable core, and in the brake fluid pressure maintaining state, it is closed and, in the brake fluid pressure no-maintaining state, it is always opened, and by changing the value of the current, an attracting force is changed; by setting the attracting force at a given value, the brake fluid pressure to be maintained on the wheel brake side is set; and, when it is closed, in case where the brake fluid pressure of the wheel brake is higher than the attracting force of the given value, it is opened against the attracting force to thereby reduce the brake fluid pressure of the wheel brake down to the given value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.