Adaptive knock control with variable knock tuning

Details Adaptive knock control with variable knock tuning Adaptive knock control with variable knock tuning

1986-04-14

1987-05-12

Wolfe, Jr., Willis R.

Internal-combustion engines

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

73 35, F02P 514

Patent

active

046640835

ABSTRACT:
An adaptive knock control for a spark ignited, internal combustion engine is disclosed in which a signal indicating sensed knock induced and other bursts of engine vibrations is passed through a bandpass filter effective to tune the apparatus to a characteristic knock frequency which is variable with engine speed. The filter tuned frequency may be varied directly with engine speed to follow the characteristic knock frequency. Additionally or alternatively, it may be varied, at a particular engine speed, in a first direction away from the knock frequency avoid a strong engine noise component in the opposite direction from the knock frequency.

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