Internal-combustion engines – Igniters – Sparkers
Patent
1980-11-28
1983-03-08
Myhre, Charles J.
Internal-combustion engines
Igniters
Sparkers
123652, 310 70A, 315218, F02P 108
Patent
active
043757944
ABSTRACT:
An ignition system of the contactless interrupt type for an internal combustion engine is disclosed with a control circuit including a pair of solid state semiconductor devices with one connected to the other in a controlling relation. The ignition system has a high voltage transformer with a secondary winding coupled to a spark plug and a primary winding shunted by the controlled one of the pair of semiconductors. A current flow is induced in the primary winding and then interrupted near its maximum value by rendering both of the semiconductor devices nonconducting. The controlling semiconductor may be a gate controlled switch or so-called gate turn-off device while the controlled semiconductor may be a power transistor. The primary winding current flow is induced by movement of a flywheel supported permanent magnet past the high voltage transformer while the current interrupt feature includes a control coil coupled to the controlling semiconductor and positioned close to the high voltage transformer to be influenced by the permanent magnet motion.
REFERENCES:
patent: 3405347 (1968-10-01), Swift et al.
patent: 3484677 (1969-12-01), Piteo
patent: 3958546 (1976-05-01), Ohki et al.
patent: 4090488 (1978-05-01), Ohki et al.
patent: 4120277 (1978-10-01), Ehlen
patent: 4188930 (1980-02-01), Santi
patent: 4207852 (1980-06-01), Ohki et al.
patent: 4270509 (1981-06-01), Tharman
Dolinar Andrew M.
Jeffers Albert L.
Myhre Charles J.
Rickert Roger M.
Tecumseh Products Company
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