Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1997-04-02
1999-08-31
Elms, Richard T.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
701 71, B60L 100
Patent
active
059457430
ABSTRACT:
A supervisory circuit for an anti-lock brake system (ABS) unit. The circuit includes an independent internal voltage reference source that provides power to the circuit components. The circuit also includes an external power source monitor powered by the internal voltage reference source which inhibits the ABS unit when an external power source voltage exceeds a predetermined level. The circuit also includes a system voltage monitor powered by the internal voltage reference source that inhibits the ABS unit when a system voltage deviates from predetermined system voltage parameters. The circuit also includes an electronic control unit (ECU) monitor powered by the internal voltage reference source that monitors a periodic signal generated by an ECU and that inhibits the ABS unit if an ECU timing signal deviates from a predetermined threshold level. The supervisory circuit helps to prevent spurious operation of ABS modulators due to race conditions.
REFERENCES:
patent: 4661910 (1987-04-01), Reinecke et al.
patent: 4703388 (1987-10-01), Ruhnau
patent: 5170343 (1992-12-01), Matsuda
patent: 5739592 (1998-04-01), Rigsby et al.
Greenly Cheryl L.
Pattantyus Tamas I.
Squires Ronald E.
AlliedSignal Truck Brake Systems Co.
Elms Richard T.
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