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US 2014/0109870 A1Published application
Engine control system and method
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Gopichandra Surnilla
Life of this patent
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Abstract
Methods and systems are provided for purging condensate from a charge air cooler to an engine intake while reducing misfire events related to the water ingestion. During the purging, a spark timing is adjusted based on the amount of condensate purged per cycle. The spark timing is adjusted differently when the condensate is purged during a tip-in versus a pro-active clean-out routine.
Claims20
A method for a boosted engine, comprising:
- adjusting spark timing from an initial setting based on ambient humidity to a final setting, the adjusting based on a change in condensate level at a charge air cooler.
A method for a boosted engine, comprising:
- during a first condition, when intake manifold humidity is higher than ambient humidity, advancing spark timing to MBT;
- during a second condition, when intake manifold humidity is lower than ambient humidity, retarding spark timing from MBT;
- during a third condition, when intake manifold humidity is at ambient humidity, maintaining spark timing at MBT.
A method for a boosted engine, comprising:
- adjusting spark timing responsive to condensate flow from a charge air cooler (CAC) to an engine.
Dependencies are inferred from the claim text.