Oxygen sensor monitor

Details Oxygen sensor monitor Oxygen sensor monitor

1985-04-22

1986-11-18

Tokar, Michael J.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

204401, G01D 1800

Patent

active

046228446

ABSTRACT:
A monitor (26) for use in a vehicle to check the operation of an oxygen sensor (20). The monitor (26) has a regulator (64) that changes the fluctuating voltage associated with a vehicle electrical system into a stable voltage source. An amplifier (68) receives an output signal from the oxygen sensor (20) and generates a buffered output signal. A comparator (70) compares the buffered output signal with a reference signal. When the buffered output signal is equal to the reference signal, the source voltage from the regulator (64) activates a diode (40) to inform an operator that the output voltage of the oxygen sensor (20) is within acceptable operating limits.

REFERENCES:
patent: 4094186 (1978-06-01), Wessel
patent: 4223549 (1980-09-01), Kitzinger
patent: 4335369 (1982-06-01), Taniguchi et al.
patent: 4348732 (1982-09-01), Kreft
patent: 4389881 (1983-06-01), Butler et al.
patent: 4494399 (1985-01-01), Youngman

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