Internal-combustion engines – High tension ignition system – Having dwell control
Patent
1991-01-08
1991-12-10
Dolinar, Andrew M.
Internal-combustion engines
High tension ignition system
Having dwell control
123618, F02P 7077
Patent
active
050708538
ABSTRACT:
An ignition device for an internal combustion engine comprises an ignition signal generator whose output signal has a magnitude corresponding to the engine rpms and is in synchronism therewith, a d.c. bias circuit 3 having a predetermined construction and component parameter values for superimposing a d.c. bias voltage on the ignition signal, a threshold setting circuit for determining a threshold level voltage, a comparator 2b having a first input terminal for receiving a signal obtained by superimposing the ignition signal and the d.c. bias voltage and a second input terminal for receiving the threshold level voltage to thereby generate an output having an inverse level in response to the magnitude of the input voltages inputted to the input terminals, and a switching circuit 4 for controlling a primary current to an ignition coil in response to the output of the comparison circuit. The threshold level voltage at the time of supplying the primary current to the ignition coil is determined by a circuit including a plurality of components having the same component parameter values as corresponding components in the d.c. bias circuit.
REFERENCES:
patent: 3882840 (1975-05-01), Adamian et al.
patent: 4202304 (1980-05-01), Jundt et al.
patent: 4356808 (1982-11-01), Bodig et al.
patent: 4397290 (1983-08-01), Tanada et al.
patent: 4411246 (1983-10-01), Sugiura
patent: 4492213 (1985-01-01), Yamamoto et al.
Dolinar Andrew M.
Mitsubishi Denki & Kabushiki Kaisha
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