Method and apparatus for controlling the temperature of a heated

Details Method and apparatus for controlling the temperature of a heated Method and apparatus for controlling the temperature of a heated

1992-12-31

1994-10-18

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

053557239

ABSTRACT:
The temperature of a measuring resistor is controlled for measuring the mass flow rate of intake air entering an internal combustion engine. The operating temperature of the measuring resistor is regulated by controlling the level of electric current flowing therethrough. A voltage signal based on the level of electric current flowing through the measuring resistor is generated which is indicative of the mass flow rate of air entering the engine. The operating temperature target value of the measuring resistor is adjusted based on the value of the voltage signal, to optimize the measurement sensitivity thereof based on the level of the intake air mass flow rate.

REFERENCES:
patent: 4279146 (1981-07-01), Wessel et al.
patent: 4373383 (1983-02-01), Plapp et al.
patent: 4450719 (1984-05-01), Nishimura et al.
patent: 5018385 (1991-05-01), Frick
patent: 5207094 (1993-05-01), Gmelin et al.
Dr. Ing. Herbert Strickert, "Hitzdraht-& Hitzfilm-manemometrie," [Heated-wire-and Heated-film-manemometry], VEB Verlag Technik, Berlin, Germany, 1974, Section 4.2 (pp. 68-71).

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