Knocking detection apparatus and detecting method

Details Knocking detection apparatus and detecting method Knocking detection apparatus and detecting method

2007-02-06

2007-02-06

Chapman, John E. (Department: 2856)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S035080

Reexamination Certificate

active

10829212

ABSTRACT:
A knocking detection apparatus including: spark plugs disposed in cylinders of an internal combustion engine; an ion current detector for detecting ion currents flowing in the spark plugs; a time-frequency transformer for setting time intervals allowing one or more overlaps within a time from after ignition by the spark plugs to until the spark plug in the respective cylinder or in another cylinder next ignites and sampling ion currents in the respective time intervals to determine the time-frequency components of the ion current; a knocking detector for detecting knocking based on the time-frequency components; and a detection controller for inputting running status and controlling the time-frequency transformer and the knocking detector.

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