Combustion condition detection apparatus for an internal...

Details Combustion condition detection apparatus for an internal... Combustion condition detection apparatus for an internal...

2005-08-23

2005-08-23

Raevis, Robert (Department: 2856)

Measuring and testing

Engine detonation

Specific type of detonation sensor

Reexamination Certificate

active

06931914

ABSTRACT:
A combustion condition detecting apparatus for an internal combustion engine has a current distributor that distributes an ion current, a band pass filter which extracts a knock vibration component from a current distributor output, a knock determination section which outputs a knock pulse if the extracted knock vibration component is larger than a knock detection threshold value, a combustion determination section which outputs a combustion pulse when an current distributor output is larger than a combustion pulse threshold value, an ignition signal determination section which makes a determination on the basis of an ignition signal as to whether energization of an ignition coil for ignition in another cylinder is started, and an ion current limiting section which limits its ion current output to the current distributor during a predetermined time period after the start of energization of the ignition coil for ignition in the another cylinder.

REFERENCES:
patent: 5675072 (1997-10-01), Yasuda et al.
patent: 6000276 (1999-12-01), Mogi et al.
patent: 6378494 (2002-04-01), Hatazawa et al.
patent: 6550456 (2003-04-01), Uchida et al.
patent: 11-351053 (1999-12-01), None
patent: 2001-073862 (2001-03-01), None
patent: 2001-140740 (2001-05-01), None

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