Closed loop MBT timing control using ionization feedback

Details Closed loop MBT timing control using ionization feedback Closed loop MBT timing control using ionization feedback

2006-03-21

2006-03-21

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406330, C123S406270, C701S102000, C701S111000

Reexamination Certificate

active

07013871

ABSTRACT:
This feature of the present invention comprises a closed loop which uses estimated MBT timing criteria and ignition diagnostics (knock, partial-burn, and misfire) to control engine ignition. When the engine is not knock limited, it operates at its MBT timing. When the engine is knock limited, the engine runs at its inaudible knock limit. When the engine is misfire/partial-burn limited, the engine is maintained at its misfire/partial-burn limit. Three different embodiments of the closed loop MBT timing control architecture are disclosed: a cylinder-by-cylinder control, an average control and a mixed control.

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