Magneto ignition system for an internal combustion engine

Details Magneto ignition system for an internal combustion engine Magneto ignition system for an internal combustion engine

1986-11-03

1988-03-01

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123149C, 123599, F02P 306

Patent

active

047278510

ABSTRACT:
To reduce spurious sparks, and then misfire of an ICE having a magneto with an E armature, upon approach of a magnet (23) in a pole wheel (13) to the leading leg (26) of the E core at high speed ranges of the ICE, the magnetic reluctance of the magnetic path which includes the leading legs (26, 26a) of the E core (14, 14a) is increased with respect to that of the magnetic path which includes the trailing core (25), so that the inductivity of the magnetic circuit including the leading leg is decreased. This can be achieved by providing a wider air gap (X) at the leading leg (26) than at the center leg (15) and the trailing leg (25) of the E core; or reducing the cross-sectional area, or effective magnetic cross-sectional area, e.g. by reducing the number of laminations of the core, at the leading leg or reducing the size of the pole shoe surface (27) facing an air gap which is the same for all legs. A uniform air gap facilitates assembly of the E core. An additional air gap (28) can be introduced in the magnetic circuit which includes the leading leg (26a).

REFERENCES:
patent: 3576183 (1971-04-01), Miyamato
patent: 3667441 (1972-06-01), Cavil
patent: 3894524 (1975-07-01), Burkett et al.
patent: 3963015 (1976-06-01), Haubner et al.
patent: 4214566 (1980-07-01), Nanja et al.
patent: 4215284 (1980-07-01), Zentmayer, Jr.
patent: 4270509 (1981-06-01), Tharman
patent: 4515118 (1985-05-01), Haubner et al.
patent: 4515140 (1985-05-01), Enomito et al.
patent: 4538586 (1985-09-01), Miller

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