VEHICLE PNEUMATIC BRAKE DRIVE Russian patent published in 1996 - IPC

FIELD: transport engineering. SUBSTANCE: pneumatic brake drive has compressor, pressure regulator, protection valve unit, air cylinders of service brake system, two-section brake system control, parking brake control cock, brake chambers of service brake system, spring energy accumulators of parking brake system, and pressure drop pneumoelectric transmitters. Service brake system air cylinders and inputs of two-section brake calve connected by outputs with brake chambers are connected to first and second outputs of protection valve unit. Connected to third output of protection valve unit is input of parking brake system cock connected by output with spring energy accumulators. Other compressed air consumers are connected to fourth output of protection valve unit. Pressure drop transmitters are installed in air cylinders of service brake system and at inputs of spring energy accumulators. Pneumatic brake drive has integrated air cylinder, additional protection valve, normally closed electropneumatic valve, four two-line valves, additional pressure drop transmitter. Integrated air cylinder has output to supply other consumers with compressed air, it is connected to fourth output of protection valve unit through first two-line valve, is connected with input of parking brake system cock through second two-line valve, is coupled with inputs of two-section brake valve of service brake system by means of third and fourth two-line valves. Second inputs of third and fourth two-line valves are connected with service brake system air cylinders. Second input of second two-line valve is connected to third output of protection valve unit coupled through additional protection valve with output of pressure regulator. Second input of first two-line valve is connected to output of pressure regulator through normally closed electropneumatic valve. Electric circuit of electropneumatic valve is connected, in parallel with optical indicator, to additional pressure drop transmitter installed in pneumatic line between third output of protection valve unit and second input of second two-line valve. Pressure drop transmitters of service brake system circuits are installed at inputs of sections of service brake system circuits are installed at inputs of sections of two-section brake valve. Second additional pressure drop transmitter is installed on integrated air cylinder and is connected with optical indicator. Placed in electric circuit of electropneumatic valve is hand-operated switch. EFFECT: enhanced reliability of brake system. 2 cl, 1 dwg