Ignition timing controlling apparatus and ignition timing...

Details Ignition timing controlling apparatus and ignition timing... Ignition timing controlling apparatus and ignition timing...

2011-06-21

2011-06-21

Moulis, Thomas N (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S406330, C123S406380, C701S111000

Reexamination Certificate

active

07963269

ABSTRACT:
A 90° integrated value calculating unit of an engine ECU calculates a 90° integrated value obtained by integrating a magnitude. A calculating unit calculates a knock magnitude by dividing 90° integrated value by a BGL. A value obtained by subtracting a standard deviation σ from a median value of 90° integrated value is determined as the BGL. An ignition timing control unit controls the ignition timing depending on whether knock magnitude is equal to or larger than a determination value. A median value calculating unit calculates median value of 90° integrated value. A standard deviation calculating unit calculates standard deviation of 90° integrated value. A first stop unit stops updating of median value and standard deviation when 90° integrated value is smaller than a first threshold value or is equal to or larger than a second threshold value.

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