METHOD FOR CONTROLLING A SERVICE BRAKE DEVICE ACTUATED BY A SERVICE BRAKE VALVE DEVICE AS WELL AS SERVICE BRAKE DEVICE

摘要

The invention relates to a method for controlling an electropneumatic service brake device (124) actuated by an electropneumatic service brake valve device (1), in particular of an electronic braking system (EBS) of a motor vehicle, wherein the electropneumatic service brake valve device (1) has a service brake actuating mechanism (10) as well as, within at least one electrical service brake circuit of the electropneumatic service brake device (124), at least one electrical channel (130) comprising at least one electrical braking power sensor (67) actuated by the service brake actuating mechanism (10) in response to a driver's braking requirement, for actuation-dependent adjustment of actuation signals and with at least one control device [FBM-ECU] receiving the actuation signals, as well as at least one pneumatic channel (132, 134) inside at least one pneumatic service brake circuit of the electropneumatic service brake device (124), in which pneumatic channel (132, 134), by actuation of the service brake actuating mechanism (10) in response to a driver's braking requirement, at least one control piston (4, 12) of the service brake valve device (1) is acted upon with a first actuating force, and the control piston (4; 12) directly or indirectly controls at least one double-seat valve (34) of the service brake valve device (1) containing an inlet seat (64) and an outlet seat (32), in order to generate a pneumatic braking pressure or braking control pressure for the pneumatic wheel brake actuators (1, 18, 120). The invention provides that, in case of a braking requirement that is independent of the driver's desire, the at least one control piston (4; 12) of the service brake valve device (1) is acted upon by a second actuating force in addition to the first actuating force, or by a second actuating force instead of the first actuating force, which second actuating force acts on the at least one control piston (4; 12) in parallel to, and in the same direction or in the opposite direction relative to, the first actuating force, and independently of the driver's braking requirement, on the basis of the controlled electrical signals generated by the electronic control unit (FBM-ECU) of the service brake valve device (1).