The invention relates to an electronically controllable pneumatic
brake system (100) in a vehicle (200), at least comprising: wheel brakes (1, 2, 3, 4), where wheel brakes (3, 4) of at least one vehicle axle (HA, VA) comprise spring-type
brake cylinders (3a, 4a), an electronically controllable monostable
bypass valve (16), where the monostable
bypass valve (16) is arranged between a manually actuatable
parking brake valve (15) and the spring-type
brake cylinders (3a, 4a) in such a way that, in a first switching position (Z1), the monostable
bypass valve (16) controls a bypass control pressure(p16) according to an actuation pressure (p15) produced by the
parking brake valve (15), in order to implement a manually pre-defined
parking brake force (fPBm), and, in a second switching position, it controls a bypass control pressure (p16) according to a prevailing bleed pressure (pE) in a bypass bleed connection (16c), in order to implement an electrically pre-defined parking
brake force (fPBe), where a parking brake
brake pressure (pPB) controlled on the spring-type brake cylinder (3a, 4a) can be adjusted according to the bypass control pressure (p16), and where the monostable bypass valve (16) automatically shifts into the first switching position (Z1) without
electrical control.