Measuring and testing – Simulating operating condition – Marine
Patent
1985-04-16
1986-01-21
Myracle, Jerry W.
Measuring and testing
Simulating operating condition
Marine
73204, G01M 1500
Patent
active
045650918
ABSTRACT:
Disposed in an intake pipe of an engine is a temperature-sensitive element formed of a resistance element whose resistance value varies with temperature. A heating current is supplied to the temperature-sensitive element through a transistor. The voltage of the heating current is set by a constant-voltage circuit. The temperature of the temperature-sensitive element is compared with a reference temperature of an auxiliary temperature-sensitive element. When the temperature of the temperature-sensitive element is increased to a predetermined level, an output signal is delivered from a comparator. A flip-flop circuit is reset by the output signal from the comparator, and is set by a start pulse signal. When the flip-flop circuit is set, the transistor is turned on, allowing the heating current to be supplied to the temperature-sensitive element. A burning-off instruction signal is supplied to a monostable multivibrator, and a signal with a duration suited for the burning-off operation is delivered from an AND circuit. In response to the output signal from the AND circuit, the flip-flop circuit is held set, and a reference voltage supplied to the differential amplifier is changed to a low level.
REFERENCES:
patent: 4357829 (1982-11-01), Kraus et al.
patent: 4373383 (1983-02-01), Plapp et al.
Abe Tomoaki
Akiyama Susumu
Ito Katsunori
Mizuno Tiaki
Yamada Toshitaka
Myracle Jerry W.
Nippondenso Co. Ltd.
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