Control apparatus of ignition current conducting time

Details Control apparatus of ignition current conducting time Control apparatus of ignition current conducting time

1991-03-14

1992-09-01

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Having dwell control

123632, F02P 306

Patent

active

051435535

ABSTRACT:
During an abnormal stop condition of an internal combustion engine, the semiconductor devices which control the supply of current to the ignition coils during a dwell time are subject to damage by a high transient current. To prevent this, at least one predetermined time interval is selected on the basis of detected engine temperatures and/or battery supply voltage level and this selected time interval is compared to a time period between reference pulses from a crank angle sensor. When the time period between reference pulses exceeds the selected time interval, a stop condition of the engine is indicated and the semiconductor devices which supply ignition current are controlled to shorten the dwell time or entirely stop the supply of current to the ignition coils.

REFERENCES:
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patent: 3901205 (1975-08-01), Brungsborg
patent: 3965878 (1976-01-01), Salway
patent: 4309973 (1982-01-01), Tamura
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patent: 4711226 (1987-12-01), Neuhalfen et al.
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patent: 4893605 (1990-01-01), Ozawa
patent: 4915086 (1990-04-01), Ciliberto et al.
patent: 5007397 (1991-04-01), Akasu

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