Knocking detection

Details Knocking detection Knocking detection

2007-11-27

2007-11-27

Kwok, Helen (Department: 2856)

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

C123S406420, C702S056000

Reexamination Certificate

active

11268729

ABSTRACT:
An in-cylinder pressure sensor for outputting a signal corresponding to an internal cylinder pressure of an engine is provided. A first signal and a second signal are extracted from the output signal of the in-cylinder pressure sensor. The first signal has a frequency band corresponding to knocking of the engine. The second signal has a frequency band used for detecting a peak of the internal cylinder pressure. A knocking detection period is set based on the second signal. The first signal in the knocking detection period is examined to determine whether or not knocking has occurred.

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