Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Reexamination Certificate
2006-09-05
2006-09-05
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
C123S568110
Reexamination Certificate
active
07100585
ABSTRACT:
A method for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve. The method acquires a measurement value of a reference position of the recycling valve at a predetermined time corresponding to a normally closed position of the valve, calculates the difference between the acquired reference value and a reference value acquired during a diagnostic cycle previously carried out, and compares the calculated difference with a threshold value for detecting opening of the valve.
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Patent Abstract Of Japan, publication No. 62-279261.
Bourret Stephane
Leprieur Laurent
Meurisse Olivier
Gimie Mahmoud
Renault S.A.S.
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