Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-07-12
1988-04-19
Caldwell, Sr., John W.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303109, B60T 802
Patent
active
047384913
ABSTRACT:
An anti-lock brake device for use with wheel brakes connected to wheels of a vehicle is disclosed having a hydraulic pressure control circuit for controlling the application of hydraulic brake pressure to the wheel brake and a control element for detecting whether the wheels are likely to lock from rotational velocity characteristics of the wheels and operating said hydraulic pressure control circuit to reduce said hydraulic brake pressure applied to said wheel brakes when said wheels are likely to lock. The control element further includes a decision circuit for outputting a signal on the assumption that one condition for reducing the hydraulic brake pressure has been satisfied when the wheel velocity is lower than a reference wheel velocity, and a delay circuit for outputting an operating signal for nullifying the signal output from the decision circuit until a predetermined period of time has elapsed after the signal is received from the decision circuit.
REFERENCES:
patent: 3804469 (1974-04-01), Takeuchi et al.
patent: 3909071 (1975-09-01), Klatt
patent: 4395761 (1983-07-01), Sato et al.
Caldwell Sr. John W.
Honda Giken Kogyo Kabushiki Kaisha
Oberley Alvin
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