Parking brake system
US7604302B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Nov 25, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The parking brake system that restricts or releases a parking gear by using an operational force by hydraulic pressure that is generated or removed according to whether the engine works and an operational force by an electromagnetic force, includes a position valve that outputs operational pressure supplied from a hydraulic pressure supplier, to a pressure control valve corresponding to a shift range including a parking range, a parking releasing valve that outputs operational pressure supplied from position valve at the other shift ranges than a parking range, a main actuator that releases a parking gear when an operational force is transmitted from parking releasing valve and restricts the parking gear when the operational force is removed, and/or a sub-actuator that releases the parking gear by providing an operational force to main actuator only when an engine works.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.