DE2159238

1333290 Anti-skid braking systems BENDIX CORP 18 Nov 1971 [7 Dec 1970] 53618/71 Heading F2F An anti-skid braking system including provision for automatically cycling the system while the vehicle is stationary comprises an electronic control channel 11 for generating a control signal in response to wheel behaviour and a brake pressure modulator responsive to the control signal for controlling braking pressure, the channel 11 being so constructed that a false signal is generated upon energization of the channel and a switch 95 for sensing the response of the modulator operates a circuit 35 to extinguish the false signal and prevent vehicle drift. The modulator is of the vacuum suspended type and switch 95 is operated by move - ment of the diaphragm 62, a ball valve 84 also being moved to cut off pressure from a master cylinder and a chamber 92 being enlarged by movement of a rod 80 to relieve braking pressure. Channel 11 is operated by closing the ignition switch 33. Operation of the modulator is by means of solenoid valves 29a, 29b. The brake system described has two control channels 11, 13 providing signals to modulators 29, 30 via gates 20, 21, 22, 23, the second modulator having a switch 115 in parallel with switch 95. In a modification switches 95, 115 are in series instead of in parallel.