Monitoring circuit for an ABS warning lamp

Details Monitoring circuit for an ABS warning lamp Monitoring circuit for an ABS warning lamp

1997-02-06

1998-08-25

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340461, 340641, 315 77, B60Q 1100

Patent

active

057986908

ABSTRACT:
A monitoring circuit for detecting a malfunctioning warning lamp circuit includes a first device for monitoring the voltage within the warning lamp circuit and a second device for monitoring the current through the warning lamp circuit. Each of the monitoring devices has an output which is connected to a decision device. The first device generates a first output signal when the monitored voltage is greater than a predetermined voltage and a second output signal when the monitored voltage is less than the predetermined voltage. The second device generates a first output signal when a current flows through the lamp and a second output signal when there is no current flowing through the lamp. The decision device is responsive to the output signals from the monitoring devices to generate a failure signal when the warning lamp circuit malfunctions.

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patent: 5442257 (1995-08-01), Mitsumoto
patent: 5515028 (1996-05-01), Dittmar

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