Brake control system of a mobile work machine, in particular industrial truck

The system (1) has an electrical actuatable brake valve device (10) comprising an electrically actuatable control valve (12) i.e. two-position valve, arranged in one of brake release pressure lines (8). The pressure lines are formed between another electrically actuatable control valve (11) and brake release pressure chambers (7a, 7b). The latter control valve connects the pressure chambers with a pressure reduction or pressure maintenance device (21) or a container (14) in an electroless state. An electronic control device (30) is provided for operation of the valve device.