Internal-combustion engines – Igniters – Sparkers
Patent
1983-12-20
1985-11-05
Lall, Parshotam S.
Internal-combustion engines
Igniters
Sparkers
123149R, 310153, 310156, F02P 100
Patent
active
045506973
ABSTRACT:
A scheme for mounting a permanent magnet group on the flywheel of a small internal combustion engine to provide the moving portion of an ignition system for such an engine is disclosed wherein the engine flywheel is formed of cast iron or similar ferromagnetic material and the magnet group is magnetically isolated from that flywheel so as to minimize short circuiting of the magnet group flux. A generally flat region of the flywheel receives a spacer or plate formed from aluminum or a similar substantially non-magnetic material such as zinc with that plate sandwiched between the flywheel and the magnet group by a pair of aluminum or similar non-magnetic material rivets passing through the flywheel plate and magnet group. The magnet group is held accurately and rigidly in position by upsetting the rivets in such a manner as to axially compress and therefore radially expand the rivet material so that the rivets tightly fill the respective apertures through which they pass. A further overlying plate of aluminum, zinc or other non-magnetic material may be included to retain the magnet group in position on the flywheel.
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Jeffers Albert L.
Lall Parshotam S.
Niewyk Anthony
Tecumseh Products Company
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