Vehicle ignition system having adaptive knock retard with starti

Details Vehicle ignition system having adaptive knock retard with starti Vehicle ignition system having adaptive knock retard with starti

1993-07-19

1994-07-12

Wolfe, Willis R.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123425, F02P 515

Patent

active

053278682

ABSTRACT:
A vehicle engine utilizes adaptive knock retard in which non-volatile memory cells store slowly changed values based on sensed knock to retard ignition timing. Upon engine start, the values in one or more of the memory cells may be reduced in a proportional manner to provide a more advanced engine ignition timing more appropriate to engine warmup. The proportional reduction is based on the sensed engine coolant temperature at the initiation of engine operation, either by itself or through the difference between it and the stored engine coolant temperature from just before the cessation of the last period of engine operation.

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