Internal-combustion engines – Igniters – Incandescent
Patent
1981-08-21
1983-11-29
Lazarus, Ira S.
Internal-combustion engines
Igniters
Incandescent
123179BG, 123179H, F02P 1902
Patent
active
044175507
ABSTRACT:
An engine preheating apparatus in which an actuation circuit for a glow plug mounted in the engine is provided with a starting resistor of barium titanate of which the resistance value abruptly increases at a specific temperature, and a normal-operation resistor connected in parallel to the starting resistor. When the starting resistor is low in temperature and hence has a small resistance value, a large current is supplied to the glow plug, whereas when the starting resistor is high in temperature and therefore has a high resistance, a comparatively small current is supplied to the glow plug through the normal-operation resistor. The starting resistor is comprised of plural resistor elements of barium titanate as a main component and plural electrode plates alternately pressed one on each other. Each of the electrode plates is in pressure contact with each of heat radiators, so that the heat generated by the resistor elements is radiated from the radiators through the electrode plates. The time constant of the resistor elements is determined by the shape of that portion of the electrode plate which is connected to the radiator.
REFERENCES:
patent: 4280452 (1981-07-01), Kawamura et al.
patent: 4307688 (1981-12-01), Steele
patent: 4317434 (1982-03-01), Kato
patent: 4363958 (1982-12-01), Kobayashi et al.
Ito Novuei
Kato Yoji
Kida Masashi
Kobayashi Akihiro
Lazarus Ira S.
Nippon Soken Inc.
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