Malfunction determining apparatus of an exhaust gas recirculatio

Details Malfunction determining apparatus of an exhaust gas recirculatio Malfunction determining apparatus of an exhaust gas recirculatio

1997-06-10

1999-08-31

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

731173, F02M 2507

Patent

active

059439998

ABSTRACT:
A malfunction determining apparatus of an exhaust gas recirculation system can prevent an erroneous determination that an exhaust gas recirculating valve is normal when the valve has a cause of malfunctioning. The exhaust gas recirculating valve is provided between an exhaust passage and an intake passage of an internal combustion engine of a vehicle. An operation determining part determines whether the exhaust gas recirculating valve has been operated at least once. A malfunction determining part performs a determination as to whether the exhaust gas recirculation system is malfunctioning. The determination is performed after the exhaust gas recirculating valve has been operated at least once.

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Patent Abstracts of Japan, vol. 096, No. 002, Feb. 29, 1996 & JP 07 269392 A (Suzuki Motor Corp), Oct. 17, 1995.

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