| 主权项 |
1. An electropneumatic pressure control module for a pressure-medium-actuated brake system of a motor vehicle, comprising:
at least two channels, the module being controlled electrically in undisrupted operation and pneumatically in the event of a fault in the electrics, including:
a) one electropneumatic valve unit, which is controllable by an electronic control device and has at least a first backup valve and a second backup valve, one inlet valve and one outlet valve, and also at least one relay valve having a control chamber and a working chamber are provided per channel, and the electropneumatic valve unit pneumatically controls the relay valve,b) the first backup valve, in the event of a fault in the electrics, is connectable to a device for generating a control pressure that is dependent on a driver's request and also to the control chamber of the relay valve assigned to the channel in question,c) the working chamber of the relay valve of one channel is connected to at least one pneumatic brake actuator that is assigned to at least one wheel and the working chamber of the relay valve of the other channel is connected to at least one other pneumatic brake actuator that is assigned to at least one other wheel,d) at least one pressure-medium connection that extends between the control chamber of the relay valve of the one channel and the control chamber of the relay valve of the other channel is provided,e) the first backup valve of the one channel is arranged in the pressure-medium connection,f) at least one wheel speed sensor assigned to the one wheel and at least one wheel speed sensor assigned to the other wheel are provided, wherein each wheel speed sensor generates sensor signals which represent the wheel rotational behavior of the wheel assigned thereto, and wherein:
g) the second backup valve of the other channel is connected upstream of the pressure-medium connection and of the first backup valve of the one channel such that the pressure-medium connection and the first backup valve of the one channel can be supplied with the control pressure that is dependent on the driver's request only by the second backup valve of the other channel,h) a single pressure sensor, which is connected to the working chamber of the relay valve of the one channel or to the working chamber of the relay valve of the other channel, andi) in undisrupted operation, the first backup valve of the one channel, the first backup valve being arranged in the pressure-medium connection between the control chambers of the relay valves, is electrically controlled by the control device in a manner dependent on the sensor signals from the wheel speed sensors assigned to the one wheel and to the other wheel;wherein the inlet valves, the outlet valves and the backup valves are each in the form of a 2/2-way solenoid valve having a blocking position and a passage position. |
