Method and system for pre-ignition control

Details Method and system for pre-ignition control Method and system for pre-ignition control

2010-08-05

2011-12-06

Solis, Erick (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S103000, C123S435000, C123S690000

Reexamination Certificate

active

08073613

ABSTRACT:
Methods and systems are provided for mitigating engine pre-ignition based on a feed-forward likelihood of pre-ignition and feedback from a pre-ignition event. In response to an indication of pre-ignition, a cylinder may be enriched while an engine load is limited. The enrichment may be followed by an enleanment to restore exhaust catalyst feed-gas oxygen levels. The mitigating steps may be adjusted based on engine operating conditions, a pre-ignition count, as well as the nature of the pre-ignition.

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