Hydraulic pressure control device and vehicle brake device using the same
US6644760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic pressure control device is provided in which a proportional pressure control valve is actuated by operating the brake pedal to adjust the hydraulic pressure supplied from a pressure source to the wheel brakes to a value corresponding to the pedal operating amount. Also, a brake device for a vehicle using it is provided. The proportional pressure control valve is integrated with a hydraulic pressure generator to transmit the input from the brake pedal to a spool valve in the control valve through a first piston, first spring, second piston and second spring of the hydraulic pressure generator. If the pressure source or the wheel brakes in a first line fail, after the second piston has made a full stroke, brake fluid in a fluid chamber is pressurized, so that the hydraulic pressure generated is supplied to wheel brakes in a second line through a copy valve which is open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.