Diagnosis apparatus and method for an exhaust gas recirculation

Details Diagnosis apparatus and method for an exhaust gas recirculation Diagnosis apparatus and method for an exhaust gas recirculation

1996-02-20

1997-05-27

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

731173, F02M 2507

Patent

active

056322577

ABSTRACT:
A exhaust gas recirculation control value is forcibly open/close controlled at the time of steady operation. An estimation of whether or not the actual exhaust gas recirculation quantity has changed with open/close control of the exhaust gas recirculation control valve, is then made based on whether or not a change in combustion pressure accompanying the open/close is a value estimated for the operating conditions.

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