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US 9,752,495 B2Granted
Method for purging condensate from a charge air cooler
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Kristofor Robert Norman, Shuya Shark Yamada
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Abstract
Methods and systems are provided for cleaning out condensate stored at a charge air cooler. In response to increased condensate accumulation at a charge air cooler, airflow through the engine is increased to purge the condensate while an engine actuator is adjusted to maintain engine torque. Combustion stability issues of engine cylinders are addressed by adjusting fueling of each cylinder individually during condensate ingestion.
Claims12
An engine method, comprising:
- in response to condensate level in a charge air cooler,
- adjusting fuel injection timing while increasing engine airflow to a level greater than requested by a vehicle operator.
An engine system, comprising:
- an engine including one or more cylinders;
- a compressor coupled upstream of an intake throttle;
- a charge air cooler coupled downstream of the compressor;
- a direct fuel injector for injecting fuel into an engine cylinder;
- and
- a controller with computer readable instructions for,
- while an accelerator pedal position is maintained, in response to a condensate level at the charge air cooler being higher than a threshold,
- adjusting an engine fuel injection timing to operate one or more cylinders in a lean stratified mode until the condensate level is below the threshold.
5 more elements
Dependencies are inferred from the claim text.