Device for detecting pinking, cylinder by cylinder, in a multi-cylinder otto engine
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United States of America Patent
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-
Sep 15, 1992
Grant Date -
N/A
app pub date -
Oct 3, 1990
filing date -
Oct 3, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The device includes two channels for detecting and processing the signal provided by an accelerometric sensor, operating in two frequency bands in which peaks indicative of pinking (knocking) may occur. In each combustion phase, a third channel, also connected to the sensor, provides a signal representative of the noise component of the signal from the sensor, in a frequency band in which the peaks do not occur. The signals provided by the first and second channels are integrated and then compared with a reference signal generated in dependence on the noise component detected cylinder by cylinder. The device thus enables pinking to be detected cylinder by cylinder.
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