Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Patent
1996-11-14
1998-04-07
Argenbright, Tony M.
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
60289, F01N 322
Patent
active
057351210
ABSTRACT:
An air pump abnormality-detecting system for an internal combustion engine. The engine has a catalyst arranged in the exhaust system of the engine, a passage extending from the exhaust system at a location upstream of the catalyst, and an electrically driven air pump arranged across the passage, for supplying secondary air into the exhaust system. A current sensor detects electric current flowing through the air pump, and a voltage sensor detects voltage applied to the air pump. An abnormality of the air pump is detected by comparing an output from the current sensor obtained during operation of the air pump, with predetermined abnormality-detecting reference values. At least one of the output from the current sensor or the predetermined abnormality-detecting reference values is corrected in response to an output from the voltage sensor.
REFERENCES:
patent: 5140810 (1992-08-01), Kuroda
patent: 5615552 (1997-04-01), Shimasaki et al.
Kato Hiroaki
Komatsuda Takashi
Saito Akihisa
Shimasaki Yuichi
Teshirogi Tetsu
Argenbright Tony M.
Honda Giken Kogyo Kabushiki Kaisha
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