Patent ID: 8297714

Claim:
A valve unit for an electropneumatic brake control device for controlling an air-flow-boosting valve device for controlling a parking brake of a vehicle, the valve unit comprising a vent valve for venting a control input of said air-flow-boosting valve device, said vent valve having a first operating state wherein said control input of said air-flow-boosting valve device can be vented in throttled manner via an orifice and at least one duct, said orifice and said at least one duct being configured to place a first outlet of said vent valve in pneumatic communication with a port of said valve device, a second operating state wherein said control input of said air-flow-boosting valve device cannot be vented, and a third operating state wherein said control input of said air-flow-boosting valve device can be vented in unthrottled manner via a vent device other than said orifice.