Air flow meter for internal-combustion engine

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

1983-01-27

1985-07-09

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

045274231

ABSTRACT:
Air flowing through an air cleaner is passed through a main passage and drawn into an internal-combustion engine, with a part of the air flowing through the main passage flowing into a by-pass passage having an air flow sensor mounted therein. A length of the by-pass passage is substantially three or more times longer than that of a part of the main passage corresponding thereto. Accordingly, even when the internal-combustion engine is operated with a throttle nearly totally open and the air in the main passage is pulsated, the average flow rate in the by-pass passage increases due to the inertial lag effect obtained by lengthening the by-pass passage, so that it is possible to prevent the output of the flow sensor from being undesirably lowered.

REFERENCES:
patent: 3747577 (1973-07-01), Mauch et al.
patent: 3824966 (1974-07-01), Schneider et al.
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4420972 (1983-12-01), Kuroiwa et al.

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