Valve unit for a brake control device
AssigneeWABCO GmbH
InventorsUwe Bensch, Jörg Helmer, Bernd-Joachim Kiel, Wilfried Menze
Life of this patent
Estimating the term…
Abstract
An electropneumatic brake control device for controlling an air-quantity-boosting valve device which controls a parking brake of a vehicle. A valve unit is provided that has a vent valve for venting a control input of the air-quantity-boosting valve device. The vent valve has three states. In a first state, the control input of the air-quantity-boosting valve device can be vented in a throttled manner by using an aperture. In a second state, the control input of the air-quantity-boosting valve device cannot be vented. In a third state, the control input of the air-quantity-boosting valve device can finally be vented in an unthrottled manner.
Claims18
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.
Dependencies are inferred from the claim text.