Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-08-30
1992-08-04
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303119SV, 303DIG4, 303115EC, B60T 836, B60T 864
Patent
active
051352915
ABSTRACT:
An automobile brake safety system wherein braking is automatically maintained once a brake pedal of an automobile is depressed. The brake safety system comprises a solenoid compresor valve (SCV) assembly provided between the master cylinder and wheel cylinder of an automobile, and an electronic control circuit for controlling the SCV. The brake system is operative for increasing the pressure in a wheel cylinder in the event that pressure in the wheel cylinder decreases after braking has been maintained for a prolonged period of time, or in the event that the master cylinder malfunctions. The brake system is further operative for reducing the pressure in the wheel cylinder of a vehicle when the vehicle is accelerated by an operator thereof. The SCV is mounted in the oil path between the master cylinder and the wheel cylinder and it comprises a brake solenoid coil, a compressor solenoid coil, and a release solenoid coil. The SCV is operated in response to the electronic control circuit which is responsive to electrical signals from a brake pedal switch, a one-way switch, a pressure switch, and a hand brake switch for controlling the electrical power supply to the solenoid coils of the SCV.
REFERENCES:
patent: 3608978 (1971-09-01), Neisch
patent: 3904251 (1975-09-01), Hikida et al.
patent: 4708406 (1987-11-01), Takagi et al.
patent: 4925252 (1990-05-01), Hee
Muratori Alfred
Oberleitner Robert J.
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