Preheating control apparatus for diesel engines

Details Preheating control apparatus for diesel engines Preheating control apparatus for diesel engines

1981-03-02

1990-10-09

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219202, 219501, 219505, 123179H, H05B 102

Patent

active

049623001

ABSTRACT:
A preheating control apparatus for diesel engines of the present invention is provided wherein the voltage developed across a sensing resistor connected in series with a glow plug, which voltage is indicative of the temperature of the glow plug, is amplified by an amplifier. The amplified voltage is compared with a predetermined reference voltage to control the preheating current through the glow plug so that the temperature of the glow plug can be precisely controlled without increasing the resistance value of the sensing resistor. Further, a protection circuit may be provided to end the preheating current to the glow plug in response to an abnormal change in the voltage applied to the glow plug.

REFERENCES:
patent: 3821516 (1974-06-01), Hayes et al.
patent: 3961236 (1976-06-01), Rodek et al.
patent: 4002882 (1977-01-01), McCutchen
patent: 4162379 (1979-07-01), Sebens et al.
patent: 4258678 (1981-03-01), Abe
patent: 4322604 (1982-03-01), Kawamura et al.

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