Method and arrangement for monitoring the operation of a hydroca

Details Method and arrangement for monitoring the operation of a hydroca Method and arrangement for monitoring the operation of a hydroca

1997-09-05

1999-04-27

Dombroske, George

Measuring and testing

Simulating operating condition

Marine

73 2331, G01M 1500

Patent

active

058981071

ABSTRACT:
The invention is directed to a method and an arrangement for monitoring the operation of a hydrocarbon sensor with which the sensor is monitored in a technically simple manner. The method and arrangement preferably utilize existing components of the motor vehicle. The heater power is continuously compared to a pregiven value. A sensor fault is signaled and the heater is shut off when the heater power and the pregiven value do not correspond to each other. The measured hydrocarbon value is compared to emission values to be expected for pregiven operating conditions and a sensor fault is signaled when the measured hydrocarbon value and the emission values do not correspond to each other.

REFERENCES:
patent: 4175427 (1979-11-01), Blanke
patent: 4419190 (1983-12-01), Dietz et al.
patent: 4789939 (1988-12-01), Hamburg
patent: 5105651 (1992-04-01), Gutmann
patent: 5182907 (1993-02-01), Kuroda et al.
patent: 5216882 (1993-06-01), Kuroda et al.
patent: 5408215 (1995-04-01), Hamburg
"Automotive Handbook" published by Robert Bosch GmbH, (1993), pp. 164 to 167.

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