Secondary brake system with electrohydraulic proportional valve
US6592190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle brake system includes a primary hydraulic pump, a secondary variable delivery pump, left and right service brakes and left and right secondary brakes. A service brake valve is connected between the primary pump and the service brakes, and operates the service brakes in response to brake pedal operation. Left and right service brake switches generate signals representing operational status of the service brakes. An electrohydraulic secondary brake valve operates the secondary brakes in response to an electronic control signal. Brake pressure sensors generate brake pressure signals representing the service brake pressure and the secondary brake pressure. An electronic control unit is coupled to the service brake switches, to the pressure sensors and to the secondary brake valve. The control unit generates the control signal as a function of the status of the service brakes and of the brake pressure signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.