Internal-combustion engines – High tension ignition system – Current or voltage sensing in coil primary
Patent
1986-04-08
1987-06-23
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Current or voltage sensing in coil primary
123655, 123606, F02P 312
Patent
active
046744673
ABSTRACT:
The apparatus includes an ignition instruction signal generating unit for repeatedly generating a first ignition instruction signal instructing an AC discharging duration and a second ignition instruction signal instructing the current flow time of a first primary coil at each ignition timing; and an ignition control circuit unit for causing the first and second switching elements to perform a push-pull operation for a predetermined period of time upon reception of a given ignition instruction signal. When it is detected from a current detection signal from the current detection element upon reception of the first ignition instruction signal that the current of one of the first and second closed circuits has reached a predetermined value, a signal for turning OFF the one of the first and second closed circuits is supplied to one of the first and second switching elements and a signal for turning ON the other closed circuit is supplied to the other switching element so as to enable the push-pull operation of the switching elements. Accordingly, one of the switching elements is turned ON in response to the second ignition instruction signal for the current flow time of the primary thereby, and is then turned OFF. Thus, an ignition timing can be determined precisely, and a sufficiently high voltage can be obtained.
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Goto Masahiro
Kawai Hisasi
Tokura Norihito
Nelli Raymond A.
Nippon Soken Inc.
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