Method of preheating an internal combustion engine of the diesel

Details Method of preheating an internal combustion engine of the diesel Method of preheating an internal combustion engine of the diesel

1979-06-07

1981-08-25

Myhre, Charles J.

Internal-combustion engines

Starting device

For airplane

123179H, 123145A, F02P 1902

Patent

active

042853079

ABSTRACT:
To rapidly heat glow plugs having positive temperature coefficient characteristics, or glow plugs in circuit with a positive temperature coefficient resistor, without overloading connecting relay contacts, a current limiting resistor is placed in circuit with the glow plugs upon first connection thereof to a supply source. After elapse of a first time interval of about 0.1 to 0.3, maximally 1 second, a second switch is controlled to short-circuit the current limiting resistor to permit full voltage to be applied to the glow plugs for rapid heating thereof, during a second time interval, for example between about 2 to 6 seconds, the positive temperature characteristics of the circuit self-limiting current through the resistors to thereby protect circuit switches and relay contacts.

REFERENCES:
patent: 2606544 (1952-08-01), Church et al.
patent: 3490427 (1970-01-01), Welsh
patent: 3551686 (1970-12-01), Koehler et al.
patent: 4075998 (1978-02-01), Krauss et al.
patent: 4107510 (1978-08-01), Tombs et al.
patent: 4196712 (1980-04-01), Kawamura et al.

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