Measuring and testing – Simulating operating condition – Marine
Patent
1992-08-26
1994-07-12
Noland, Tom
Measuring and testing
Simulating operating condition
Marine
324549, G01M 1900
Patent
active
053277805
ABSTRACT:
The invention relates to a method and an arrangement for monitoring the operability of a heater of an oxygen-measuring probe which is mounted in the exhaust-gas channel of an internal combustion engine. The principle of operation of the invention is based on the fact that the supply voltage of the probe heater drops during loading by the electrical resistance of the heating element. The voltage difference is dependent upon the magnitude of the resistance and therefore at least the three states can be distinguished, namely: normal operation, circuit interruption and short circuit. The operational state of the probe heater which is so determined is displayed to the driver by activation of a corresponding control unit and/or is stored, as required, in a fault memory. The arrangement according to the invention can be realized by a computer or in a compact configuration and is suitable for use in a central control apparatus.
REFERENCES:
patent: 3915828 (1975-10-01), Cleary et al.
patent: 4170967 (1979-10-01), Wessel et al.
patent: 4419190 (1983-12-01), Dietz et al.
patent: 4958611 (1990-09-01), Uchinami et al.
patent: 5054452 (1991-10-01), Denz
patent: 5090387 (1992-02-01), Mayer et al.
Entenmann Robert
Kratt Alfred
Moz Rudolf
Noland Tom
Ottesen Walter
Robert & Bosch GmbH
LandOfFree
Method and arrangement for monitoring the operability of a heate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and arrangement for monitoring the operability of a heate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and arrangement for monitoring the operability of a heate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-388946