Internal-combustion engines – High tension ignition system – Safety device
Patent
1996-11-01
1997-12-30
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Safety device
F02P 1100
Patent
active
057018766
ABSTRACT:
A misfire detecting apparatus for an internal combustion engine which can ensure enhanced reliability for detection of the misfire event by suppressing the so-called after-burning ion current generated in an engine cylinder controlled in precedence and superposed on a normal or regular ion current generated in a cylinder controlled in succession. The apparatus includes a bias voltage supplying means (9a, 9b) for applying a bias voltage (VBi) to the spark plugs (8a to 8d) by way of the high-voltage diodes (11a to 11d), an ion current detecting means for detecting ion currents (i) flowing through the spark plugs and an electronic control unit (2) for driving the ignition coil (4) and determining misfire event in the internal combustion engine on the basis of the ion current detection signal (Gia, Gib). The ion current detecting means includes a plurality of ion current detecting circuits for detecting ion currents in the engine cylinders belonging to a plurality of cylinder groups. The engine cylinders belonging to each cylinder group are so selected as not to be controlled in succession for ignition. In making misfire decision, the electronic control unit (2) makes use of the ion current detection signal derived from the ion current detection circuit means provided in association with the cylinder group which includes the engine cylinder currently subjected to the ignition control.
REFERENCES:
patent: 5146893 (1992-09-01), Ohsawa
patent: 5189373 (1993-02-01), Murata et al.
patent: 5207200 (1993-05-01), Iwata
patent: 5592926 (1997-01-01), Miyata et al.
patent: 5617032 (1997-04-01), Inagaki
Fukui Wataru
Morita Shingo
Wada Shuichi
Mitsubishi Denki & Kabushiki Kaisha
Nelli Raymond A.
LandOfFree
Misfire detecting apparatus for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Misfire detecting apparatus for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Misfire detecting apparatus for internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-194557