Valve unit, electro-pneumatic brake control device having a valve unit of said type for controlling a parking brake, vehicle brake system having a brake control device of said type and vehicle having

Abstract

The invention relates to a valve unit (86) for an electro-pneumatic brake control device (14) for controlling a vehicle brake, wherein the valve unit (86) can be or is connected to a control input (82) of an air-quantity-boosting valve device (64) and is designed for the controllable aeration and deaeration of said valve device (64) via its control input (82). A double-armature solenoid valve (134) is provided, having two magnet armatures (primary armature 138 and secondary armature 140) which are arranged in a common armature guide arrangement (136) and which are in each case loaded by a spring (142, 144) and which can be actuated by means of a common magnet coil (146). The primary armature serves as a switching element for a deaeration valve (148) and the secondary armature serves as a switching element for an aeration valve (150). When the magnet coil is not supplied with current, the primary armature (138) and the secondary armature (140) are situated in their basic position which is defined by the spring loading and in which aeration valve (150) blocks an aeration and the deaeration valve (148) activates a deaeration. When a first magnet current is fed in so as to flow through the magnet coil, the primary armature (138) is moved into a switching position, while the secondary armature (140) remains in the spring-loaded basic position. Here, the aeration valve blocks the aeration and the deaeration valve blocks the deaeration. When a second magnet current, which is greater than the first magnet current, is fed in so as to flow through the magnet coil, both the primary armature and also the secondary armature are moved into their switching positions determined by the magnet force, so that the aeration valve activates the aeration and the deaeration valve blocks the deaeration.

Description

technical field

[0001] The invention relates to a valve unit of an electropneumatic brake control device for controlling the brakes of a vehicle according to the preamble of claim 1 . According to claim 14, the invention also relates to an electropneumatic brake control device having such a valve unit for controlling the parking brake of a motor vehicle. Furthermore, according to claim 17, the invention relates to an electropneumatic vehicle brake system having such a brake control device. Finally, according to claim 18 , the invention relates to a motor vehicle having such an electropneumatic braking system. Background technique

[0002] A valve arrangement of an electropneumatic brake control device for controlling a parking brake of a motor vehicle is known, for example, from DE 103 36 611 A1 or EP 1 571 061 A1. These known brake control devices are used in braking systems which, in addition to a service brake actuatable by means of a brake pedal, also have a parking br...

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