Starter motor protection system

Details Starter motor protection system Starter motor protection system

1993-07-26

1994-09-13

Dolinar, Andrew M.

Internal-combustion engines

Starting device

Condition responsive control of starting device

290 38R, F02N 1110

Patent

active

053459016

ABSTRACT:
An engine starter has a plunger electromagnetically actuated by holding and attracting coils to move a pinion toward a ring gear on the engine and also to move a first movable contact on the plunger towards first and second stationary contacts to be electrically connected together by the first movable contact to electrically energize a starter motor. Completion of the circuit between the movable contact and the stationary contacts also serves to de-energize the attracting coil which may be damaged if energized for too long. Control means are provided to determine the voltages at each of the fixed contacts. The difference between the monitored voltages is determined and compared to a reference voltage differential. If the difference is not less than or equal to the reference voltage differential, the controller is programmed to know that the circuit has not been completed, and in order to avoid damage to the attracting coil and the starter, power is interrupted to the starter circuit.

REFERENCES:
patent: 4947051 (1990-08-01), Yamamoto et al.

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