Two stage starter drive system

Details Two stage starter drive system Two stage starter drive system

1978-11-20

1981-12-08

Truhe, J. V.

Prime-mover dynamo plants

Electric control

Electric-starting motor

290 48, 290DIG1, 74 7R, 123179R, F02N 1100, H02P 904, F02N 1700, F02N 1108

Patent

active

043050026

ABSTRACT:
A two stage positive shift starter drive system for an internal combustion engine is disclosed. A pair of electrical switches are sequentially actuated by an actuator solenoid engaging the starter drive's pinion gear with the engine's ring gear. The first switch actuated after a predetermined displacement of the solenoid's armature applies electrical power to the cranking motor through a resistance connected in series with the cranking motor and connected in parallel with the solenoid's pull in coil. The resistance reduces the electrical power applied to the cranking motor and the potential across the solenoid pull-in coil thereby reducing the rotational speed and the engagement force applied to the pinion gear. The end of the armature travel closes the second switch applying full power to the cranking motor permitting normal cranking of the engine with the pinion gear fully engaged with the ring gear.

REFERENCES:
patent: 2727158 (1955-12-01), Seilly
patent: 3597622 (1970-04-01), Wilson
patent: 3866960 (1975-02-01), Chohan

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