Hot-wire air-flow meter

Details Hot-wire air-flow meter Hot-wire air-flow meter

1984-11-14

1986-11-25

Levy, Stewart J.

Measuring and testing

Simulating operating condition

Marine

G01N 1500

Patent

active

046241345

ABSTRACT:
A hot-wire air-flow meter for internal combustion engines is integrated with a throttle valve so that the throttle valve is disposed immediately downstream of the outlet port of a bypass air passage of the air-flow meter. The shaft of the throttle valve inclines at most 45.degree. against a line connecting between the axis of the inlet port of the bypass air passage and the axis of the main air passage of the air-flow meter, whereby disturbance caused by the throttle valve in minimized. Further, a bent duct is disposed upstream of the air-flow meter so that a plane on which a bent axis of the bent duct is disposed crosses the above-mentioned line at an angle of at most 45.degree., whereby influence of the bent duct on the flow rate measuring accuracy is minimized.

REFERENCES:
patent: 4478075 (1984-10-01), Oyama et al.
patent: 4495802 (1985-01-01), Kashiwaya et al.

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