Combination AC and DC electrical starting motor for engines

Details Combination AC and DC electrical starting motor for engines Combination AC and DC electrical starting motor for engines

1977-09-02

1979-10-09

Myhre, Charles J.

Internal-combustion engines

Starting device

For airplane

123179E, 290 38R, F02N 1700, F02N 1100

Patent

active

041702115

ABSTRACT:
A combination AC and DC electrical starting motor system for internal combustion engines has a first portion responsive to DC current for cranking a starter motor assembly of an internal combustion engine, and a second portion responsive to AC current for cranking the starter motor assembly simultaneously with the first portion. Each of the first and second portions of the starting motor system includes an electrical motor, which may be shared with the other portion, and an electrical solenoid connectible to a source of current for actuating the motor simultaneously with actuation of the motor of the other portion. The solenoid of the first portion is connected to a source of DC current, and the solenoid of the second portion to a source of AC current in order to selectively place the associated motors in communication with the respective sources of current simultaneously with one another and assure sufficient current to the starting motor assembly to crank an internal combustion engine sufficient to start the engine, even in exceptionally cold weather.

REFERENCES:
patent: 1561820 (1925-11-01), Bedford
patent: 1795030 (1931-03-01), Martineau
patent: 2070615 (1937-02-01), Plante
patent: 2115671 (1938-04-01), Pfister
patent: 2123711 (1938-07-01), Cullsen
patent: 3946260 (1976-03-01), Frezzolini et al.
patent: 3991734 (1976-11-01), Martin

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