DEVICE TO CONTROL PRESSURE IN HYDRAULIC BRAKE SYSTEM OF AUTOMOTIVE VEHICLE Russian patent published in 1996 - IPC

FIELD: transport engineering. SUBSTANCE: vehicle has at least one pressure liquid source connected with low pressure liquid reservoir and second pressure liquid source in at least one subsystem; it has also two pressure pickups. Proportional electric valve is connected with each pressure pickup and with pressure liquid sources. Differential valve at pressure-vacuum duty shuts off when in inoperative position, communication between first pressure liquid source and supply of second pressure liquid source, communication being restored when second pressure liquid source is used. EFFECT: enhanced reliability of operation. 1 dwg