Internal-combustion engines – Igniters – Sparkers
Patent
1974-02-11
1977-01-18
Myhre, Charles J.
Internal-combustion engines
Igniters
Sparkers
310 70R, 200 19M, F02P 100
Patent
active
040033597
ABSTRACT:
There is disclosed pulse wheel means for fitting onto multi-lobe, breaker cams of automotive distributors to convert the distributors to a pointless or breakerless ignition system. The outer surface of such wheel means carries a plurality of upstanding, axial ribs which are equally spaced about the periphery of the wheel and which correspond in number to the number of lobes of the breaker cam, thereby forming a magnetic flux or magnetic pulse wheel for use with a magnetic field and voltage pulse generator useful in an ignition system for a multi-cylinder internal combustion engine. The wheel is formed of a metal having a high magnetic permeability, preferably by powdered metal technology wherein iron powders are molded and sintered into a cylindrical body having an axial through opening with a polygon cross-section and interior side walls generally conforming to the exterior surface of the cam. This construction provides a pulse wheel that is of a one-piece, integral construction with a very high magnetic permeability for insuring a maximum of induced voltages in the pick-up coil winding used with the pulse wheel. Additionally, the pulse wheel is in complete metal-to-metal contact with the breaker cam, thereby insuring a minimum of magnetic reluctance in the magnetic circuit used in the breakerless ignition system.
REFERENCES:
patent: 2864967 (1958-12-01), Redick
patent: 3022389 (1962-02-01), Wolrab
patent: 3249707 (1966-05-01), Johnson et al.
patent: 3272930 (1966-09-01), Frank
patent: 3370190 (1968-02-01), Neapolitakis
patent: 3584613 (1971-06-01), Kreil
patent: 3647995 (1972-03-01), Wisely
patent: 3660623 (1972-05-01), Bevaequa
Cox Ronald B.
Myhre Charles J.
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