Air-flow meter for internal combustion engine

Details Air-flow meter for internal combustion engine Air-flow meter for internal combustion engine

1982-08-05

1985-01-22

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

73204, G01M 1500

Patent

active

044944055

ABSTRACT:
An air-flow meter wherein a bypass air passage for bypassing a main air passage is provided in a throttle chamber of an internal combustion engine, and a hot wire is arranged within the bypass air passage, with the amount of air flow being measured on the basis of a change in the resistance of the hot wire. A portion for diverting the direction of air streams is disposed in an upstream part of the bypass air passage so as to assign a dust removing function, and a diameter of the hot wire is selected so that dust particles flowing to the vicinity of the hot wire do not adhere to the hot wire. A surface of the hot wire is coated with glass, and a temperature of the surface of the hot wire is maintained at or above about 100.degree. C. to enhance the prevention of dust particles adhering to the hot wire.

REFERENCES:
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4369656 (1983-01-01), Ueno et al.
patent: 4373387 (1983-02-01), Nishimura et al.
patent: 4395907 (1983-08-01), Morita et al.
patent: 4404846 (1983-09-01), Yamauchi et al.

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