Internal-combustion engines – Igniters – Incandescent
Patent
1982-10-27
1984-10-23
Lall, Parshotam S.
Internal-combustion engines
Igniters
Incandescent
123179H, 123179BG, 219492, 219497, F02N 1700
Patent
active
044781814
ABSTRACT:
An after glow control system for an engine, which controlls the voltage to be applied to glow plugs of the engine, is disclosed. The system comprises a first electric path through which a voltage is applied from a battery to glow plugs during the preheating period and a second electric path which is connected to the first electric path in parallel and through which a voltage is applied from the battery to the glow plugs during the after glow period. In the second electric path, a voltage dropping circuit of a switching type is provided. The voltage dropping circuit is provided with a switching means between the battery and the glow plugs and a switching control circuit which controls the opening and closing period of the switching means. The switching control circuit is provided with a set voltage generating circuit and a comparator which compares the output voltage of the voltage dropping circuit with the set voltage generated by the set voltage generating circuit and controls the opening and closing period of the switching means so as to keep the voltage to be applied to the glow plugs nearly equal to the set voltage. The set voltage generating circuit can be provided with a means for selecting a set voltage in accordance with the engine temperature.
REFERENCES:
patent: 4317434 (1982-03-01), Kato
patent: 4350876 (1982-09-01), Kubofa et al.
patent: 4357525 (1982-11-01), Jenne
patent: 4375205 (1983-03-01), Green
Kato Kazutaka
Kato Masahiko
Kato Masanori
Kikuchi Tetsuro
Kumoi Tomio
Lall Parshotam S.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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