Method for optimizing plug firing time and providing diagnostic

Details Method for optimizing plug firing time and providing diagnostic Method for optimizing plug firing time and providing diagnostic

1990-12-31

1992-10-20

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123630, 324391, 324399, F02P 1700

Patent

active

051561271

ABSTRACT:
The firing time of a spark plug (22) is optimized by measuring its actual firing time (as by detecting the rise of current in the secondary winding (44) of an ignition coil (24)), comparing the actual firing time to the desired firing time, and advancing or retarding the turn-off time of current in the ignition coil's primary winding (42) to reduce any measured difference between the measured actual firing time and the desired firing time. The measurements can also be used to provide diagnostic information concerning the ignition system.

REFERENCES:
patent: 3551800 (1970-12-01), Widmer
patent: 3603872 (1971-09-01), Pelta
patent: 4018202 (1977-04-01), Gartner
patent: 4381748 (1983-05-01), Eckert et al.
patent: 4438751 (1984-03-01), Iwasaki
patent: 4479479 (1984-10-01), Domland et al.
patent: 4549513 (1985-10-01), Douaud et al.
patent: 4913123 (1990-04-01), DeBiasi et al.

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