Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1995-07-06
1997-09-16
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123198D, 123479, F02M 3704
Patent
active
056669240
ABSTRACT:
When a malfunction determination mode for a fuel-evaporated-gas processing device is employed (step S1), an engine control unit 9A determines whether a malfunction of an O.sub.2 sensor 10 is being checked or not (step S2). When a malfunction of the O.sub.2 sensor 10 is being checked, the determination of a malfunction of the O.sub.2 sensor 10 is executed (step S4) without determining a malfunction of the fuel-evaporated-gas processing device. When the O.sub.2 sensor 10 malfunctions, a processing to be taken when the O.sub.2 sensor 10 malfunctions is executed (step S8) and a warning lamp is turned on (step S9). With this operation reliability in the determination of a malfunction of the fuel-evaporated-gas processing device can be improved without employing a countermeasure such as an increase of the number of determinations and the like.
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patent: 5331560 (1994-07-01), Tamura
patent: 5349299 (1994-09-01), Kanehiro
patent: 5462034 (1995-10-01), Kadota
Miller Carl S.
Mitsubishi Denki & Kabushiki Kaisha
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