Apparatus for collecting liquid temperature data from a fuel tan

Details Apparatus for collecting liquid temperature data from a fuel tan Apparatus for collecting liquid temperature data from a fuel tan

1995-06-06

1997-03-18

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374183, 374184, 374185, 73292, G01K 724

Patent

active

056116233

ABSTRACT:
An apparatus for detecting the temperature of a liquid fuel stored in a tank of a vehicle includes a thermal sensitive resistor immersed in the fuel. The resistor charges a capacitor to a level indicative of the temperature of the fuel. A programmable microprocessor signals a gate to open a communication path between the capacitor and a discharge resistor, then monitors the number of clock counts that occur before the voltage across the discharge resistor drops below a reference voltage. The microprocessor uses the clock count to determine the absolute fuel temperature, which it transmits to a central vehicle computer via a multiplexed data bus system.

REFERENCES:
patent: 3911374 (1975-10-01), Busse et al.
patent: 4504922 (1985-03-01), Johnson et al.
patent: 4562554 (1985-12-01), Stixrud et al.
patent: 4841458 (1989-06-01), Levine et al.
patent: 5046859 (1991-09-01), Yamaguchi
patent: 5143452 (1992-09-01), Maxedon et al.
patent: 5253521 (1993-10-01), Abramovich et al.

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