ABS solenoid/isolation valve integration into single-ended solen

Details ABS solenoid/isolation valve integration into single-ended solen ABS solenoid/isolation valve integration into single-ended solen

1989-03-13

1991-04-09

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

13759617, 303116, B60T 836

Patent

active

050059190

ABSTRACT:
An anti-lock braking system (ABS) solenoid isolation valve integration is provided. When ABS is entered, the ABS supply pump is turned on and the solenoid normally open port is closed to prevent fluid from entering the wheel brake area from either the master cylinder or pump. The normally closed valve is then energized (opened) which releases pressure from the wheel causing a pressure drop across the isolation valve. The above causes the isolation valve to move closing a ball seat valve which isolates the master cylinder (pedal) from the wheel (pump, solenoid, etc). The actual movement of the isolation valve is caused by the pressure generated by the master cylinder.

REFERENCES:
patent: 4129341 (1978-12-01), Pauwels
patent: 4457563 (1984-07-01), Farr
patent: 4824181 (1989-04-01), Tomala
patent: 4860794 (1989-08-01), Parrott et al.

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