Ford Global Technolgoies, LLC

Paul Mahlon Ranspach

Allen Joseph Lehmen

Marc G Uphues

Kenneth John Behr

Stephen William Magner

Marcus William Fried

David R Pedro

Zena Yanqing Yee

Douglas Owen Toms

A method for adjusting an air-fuel ratio of a turbocharged engine that operates without blow though and with blow through is disclosed. In one example, the method provides a way to provide a feed forward fuel adjustment in the presence of engine blow though so that a closed loop controller does not have to exceed its range of control authority.

Method and system for compensating engine blow-through air

Embodiments for reactivating a catalyst are provided. In one example, a method for reactivating a catalyst coupled to an engine comprises when the engine is restarted following deactivation, adjusting a degree of fuel enrichment based on an engine off duration and an engine air amount during the restart.

Methods and system for catalyst reactivation

Systems and methods for improving emissions of an internal combustion engine are presented. In one example, engine crankshaft acceleration is a basis for estimating engine air-fuel ratio during engine starting when output of an oxygen sensor may be unavailable. An actual engine air-fuel ratio may be adjusted in response to the estimated engine air-fuel ratio.

Systems and methods for improving engine emissions during starting

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Allen Park, MI, United States of America

Paul Mahlon Ranspach