Measuring and testing – Test stand – For engine
Patent
1993-03-03
1994-09-20
Raevis, Robert
Measuring and testing
Test stand
For engine
324378, G01M 1500
Patent
active
053478568
ABSTRACT:
In a misfire detector device for use in internal combustion engine, an electrical interrupter circuit on-off actuates a primary current flowing through a primary circuit of an ignition coil to induce a spark plug voltage. A check diode is provided in a secondary circuit of the ignition coil to prevent a current flowing back to the ignition coil. The spark plug has a center electrode, a front end of which is projected from an insulator, and an outer surface area of the projected front end being 25 mm.sup.2 or more. A spark plug voltage detector circuit detects an attenuation time length of a spark plug voltage waveform presented subsequent to a predetermined time period occurring after an end of a spark action of the spark plug. On the basis of the attenuation time length, a distinction circuit determines whether a misfire occurs in a cylinder of an internal combustion engine.
REFERENCES:
patent: 1214471 (1917-01-01), Jeffrey
patent: 1255880 (1918-02-01), Hill
patent: 3942102 (1976-03-01), Kuhn et al.
patent: 4112905 (1978-09-01), Stocket et al.
patent: 4648367 (1987-03-01), Gillbrand et al.
patent: 5046470 (1991-09-01), Entenmann et al.
Kagawa Junichi
Matsubara Yoshihiro
Miyata Shigeru
NGK Spark Plug Co. Ltd.
Raevis Robert
LandOfFree
Misfire detector device for use in an 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 detector device for use in an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Misfire detector device for use in an internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2428611