Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Patent
1998-06-29
2000-02-15
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
731173, F02M 2507
Patent
active
06024075&
ABSTRACT:
An engine control for an automotive engine having an inlet system and an exhaust system includes an EGR valve for permitting exhaust gas to flow from the exhaust system to the inlet system, and an engine controller for operating the EGR valve by opening the valve during successive test periods separated by non-uniform intervals, while measuring engine speed response to the opening of the EGR valve so as to diagnose an improperly operating EGR valve.
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Bidner David Karl
Czaja Ian Jay
Mehl Jonathan D.
Orzel Daniel V.
Drouillard Jerome R.
Ford Global Technologies Inc.
Wolfe Willis R.
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