Electrical parking brake system for a utility vehicle and operating method
US9308906B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 2009 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Sep 22, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/027
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electrical parking brake system and method for a commercial vehicle includes a valve device, which connects a compressed-air supply with a spring brake cylinder without an intermediate connection of a hand brake valve. The valve device aerates the spring brake cylinder in a first switching state and deaerates the spring brake cylinder in a second switching state. The system further includes a pressure sensor, which measures a pressure on the compressed air supply side, and an electronic control unit for directly or indirectly controlling the valve device, acquiring a signal supplied by the pressure sensor, and acquiring an indicator signal for the presence of an individual in a cab of the vehicle. The valve device can only be transferred to its first switching state by the control unit if the pressure on the compressed air supply side exceeds a pressure threshold value and if the presence of an individual in a cab of the vehicle is indicated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.