Vehicular drive control system

Details Vehicular drive control system Vehicular drive control system

1985-11-18

1989-01-10

Caldwell, Sr., John W.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303119, B60T 1300

Patent

active

047969571

ABSTRACT:
When excessive acceleration slip of a driving wheel is detected by wheel speed sensors attached to driving and non-driving wheels, an electronic control unit provides first and second control signals to a change-over valve and a control valve, respectively. The change-over valve operates in accordance with the first control signal to supply hydraulic pressure from a hydraulic pump to control a cut-off valve to thereby cut off communication between a master cylinder and a wheel cylinder. At the same time, hydraulic pressure from the hydraulic pump is fed to the wheel cylinder through the change-over valve and the control valve to brake the driving wheel. The control valve operates in accordance with the second control signal to increase or decrease the pressure in the wheel cylinder thereby adjusting the braking force for the driving wheel.

REFERENCES:
patent: 3667813 (1972-06-01), Burckhardt et al.
patent: 3695732 (1972-10-01), Stelzer
patent: 3771839 (1973-11-01), Fink
patent: 4416347 (1983-11-01), Bertling et al.
patent: 4477125 (1984-10-01), Belant et al.
patent: 4484280 (1984-11-01), Brugger et al.
patent: 4500138 (1985-02-01), Mizusawa et al.
patent: 4630871 (1986-12-01), Imoto et al.

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