Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-05-16
1995-10-31
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123690, F02D 4114, F02D 4122
Patent
active
054620406
ABSTRACT:
A method for distinguishing sources of error in a mixture formation or mixture regulating system of an internal combustion engine having an exhaust system with a lambda regulator and a heated lambda sensor is disclosed. A value of a sensor voltage is continuously measured. The value of the sensor voltage is compared with a lower diagnostic limit value and an upper diagnostic limit value. A lambda regulator value of the lambda regulator is varied in an enriching direction to a maximum lambda regulation limit if the lower diagnostic limit value fails to be attained, and the lambda regulator value is varied in a leaning down direction to a minimum lambda regulation limit if the upper diagnostic limit value is exceeded. The heating output of the sensor heater is raised after a time period has elapsed during which there is no departure from the maximum lambda regulation limit, and the heating output of the sensor heater is lowered after a time period has elapsed during which there is no departure from the minimum lambda regulation limit. A conclusion is drawn that there is a permanently lean mixture formation error if the lower diagnostic limit value for permanently lean mixtures is exceeded again, and a conclusion is drawn that there is a permanently rich mixture formation error if the upper diagnostic limit value fails to be attained again. Otherwise a sensor error is detected.
REFERENCES:
patent: 5054452 (1991-10-01), Denz
patent: 5209206 (1993-05-01), Danno et al.
Patent Abstract of Japan, vol. 16434, Sep. 10, 1992; snf JP-A-4148038 (Honda) May 21, 1992.
Cianciara Wojciech
Kettl Ludwig
Krebs Stefan
Argenbright Tony M.
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
LandOfFree
Method for distinguishing causes of error in the mixture forming 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 for distinguishing causes of error in the mixture forming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for distinguishing causes of error in the mixture forming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1766622