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US 9,267,423 B2Granted
Methods and systems for increasing airflow through a charge air cooler to decrease charge air cooler condensate
AssigneeFord Global Technologies, LLC
InventorsStephen George Russ, Philip Andrew Fabien, Michael P. Mandjack, Charles Allen Cockerill
Life of this patent
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Abstract
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.
Claims17
A method for an engine, comprising:
- transiently increasing airflow through a charge air cooler (CAC) of the engine by operating in a VDE mode;
- and
- maintaining engine torque by increasing boost pressure.
A method for an engine comprising:
- during a first condition,
- increasing airflow through a charge air cooler (CAC) by selectively deactivating one or more cylinders of the engine while increasing boost pressure in response to a condensate level in the CAC increasing above a threshold.
A system for an engine, comprising:
- an intake passage including a throttle;
- a turbocharger including a compressor at least partially driven by an exhaust-driven turbine;
- a charge air cooler (CAC) positioned upstream of the throttle and downstream of the compressor;
- and
- a controller with computer readable instructions for:
- transiently increasing airflow through the CAC by one or more of selectively deactivating one or more cylinders of the engine responsive to condensate formation in the CAC;
- and
- maintaining engine torque by increasing boost pressure.
5 more elements
Dependencies are inferred from the claim text.