Control for automatically starting a diesel engine

Details Control for automatically starting a diesel engine Control for automatically starting a diesel engine

1988-08-26

1989-11-07

Dolinar, Andrew M.

Internal-combustion engines

Starting device

For airplane

123179G, 290 38C, F02N 1108

Patent

active

048784656

ABSTRACT:
Electrical control apparatus for automatically starting a Diesel engine. The apparatus includes start, preheat and run relays which respectively control the energization of a starting solenoid, glow plugs, and a fuel solenoid. The energization of the start, preheat and run relays is controlled by a control module which drives the preheat relay as soon as the control module is energized. The glow plug preheat time is measured, and the run and start relays are respectively energized just prior to, and at the termination of the preheat time. Engine cranking time and speed are monitored, dropping the start and preheat relays when the engine starts, and also when the engine speed fails to reach certain thresholds within first and second predetermined periods of time. The run relay continues to energize an electrical circuit which includes an engine reset switch and a low oil pressure switch. The engine reset switch de-energizes the control module, and thus the run relay, in the event the engine fails to start.

REFERENCES:
patent: 2984993 (1961-05-01), Carraway
patent: 3371656 (1968-03-01), Stauffer et al.
patent: 3691393 (1972-09-01), Papachristou
patent: 3708683 (1973-01-01), Howland
patent: 3862429 (1975-01-01), Bucher
patent: 4421075 (1983-12-01), Mandel
patent: 4475493 (1984-10-01), Masteller et al.

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