Ford Global Technolgoies, LLC

Philip Andrew Fabien

Stephen George Russ

Charles Allen Cockerill

Michael P Mandjack

Anthony L Christman

Michael A Mancini

Jonathan Cherry

Methods and systems are provided for mitigating excessive exhaust pressures in an engine. In one example, a method may include adjusting an intake throttle responsive to exhaust pressure upstream of an exhaust turbine being higher than a threshold without reducing boost level. In this way, boost pressures may be maintained while reducing exhaust pressures.

Methods and systems for boost control based on exhaust pressure greater than a threshold

Methods and systems are provided for increasing airflow through a charge air cooler (CAC) in order to purge condensate from the CAC. In one example, a method includes increasing airflow through the CAC while maintaining torque by selectively deactivating one or more engine cylinders and increasing boost. The number of deactivated cylinders may be based on an amount of condensate within the CAC.

Methods and systems for increasing airflow through a charge air cooler to decrease charge air cooler condensate

A method for controlling spark timing in an internal combustion engine. The method includes determining, in response to a knock sensor mounted to the engine, a spark offset to the scheduled spark timing for the engine at relatively low engine speed which is applied to the scheduled spark timing at relatively high engine speeds. This offset is applied in conjunction with a time-varying spark retardation bias. The offset is removed at a rate proportional to the time varying spark retard bias. The bias increases if either a relatively large torque is demanded from the engine or the engine is at the relatively high speed and relatively high air charge condition; otherwise, the bias is decreased with time.

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Livonia, MI, United States of America

Philip Andrew Fabien