ABS main microprocessor malfunction determinaton based on pressu

Details ABS main microprocessor malfunction determinaton based on pressu ABS main microprocessor malfunction determinaton based on pressu

1995-04-28

1996-08-27

Ballato, Josie

Fluid-pressure and analogous brake systems

Speed-controlled

With failure responsive means

B60T 888

Patent

active

055493688

ABSTRACT:
An antilock brake control device comprising: a main microprocessor which forms a judgment on antilock control on the basis of wheel speed signals inputted from wheel speed sensors so as to output control signals to an actuator of a brake fluid pressure circuit in accordance with the judgment; a drive circuit for outputting drive signals to the actuator in response to the control signals; and a monitor for monitoring the control signals of the main microprocessor; wherein when a state in which the main microprocessor outputs to the actuator at least once during a first predetermined period the control signals for commanding pressure reduction or pressure holding has lasted continuously for not less than a second predetermined period, the monitor outputs, by judging that the main microprocessor does not function properly, a control prohibition signal for prohibiting operation of the drive circuit.

REFERENCES:
patent: 4700304 (1987-10-01), Byrne et al.

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