METHOD AND SYSTEM FOR IGNITION CONTROL

摘要

Methods and systems are provided for addressing spark plug soot fouling. In one example, spark plug tip temperatures are raised and maintained elevated by advancing spark timing and increasing engine speed, while reducing an amount of EGR being delivered to the engine. The spark plug fouling mitigating actions are adjusted based on whether the engine is in a green condition at an assembly plant or not.

主权项

1. A method for an engine coupled in a vehicle, comprising:
responsive to a spark plug cleaning condition, reducing EGR by a larger amount when operating an engine at a vehicle assembly plant; and reducing EGR by a smaller amount when operating the engine after the vehicle has left the assembly plant.