Air flow meter for internal combustion engines and a manufacturi

Details Air flow meter for internal combustion engines and a manufacturi Air flow meter for internal combustion engines and a manufacturi

1991-03-12

1993-04-13

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1900

Patent

active

052012166

ABSTRACT:
A detecting module for an air flow meter for internal combustion engines has an arm provided with a heat wire sensor at one end thereof and with a signal processing unit at the other end, and is provided with a predetermined constant length. A body member assembled with the detecting module is selected from among several varieties of body members produced for engines with different stroke volumes, each of which has an main air path formed by an axial bore having a diameter commensurate with the stroke volume. A bridging member formed across the axial bore which forms the main air path is provided therein with a by-pass path for by-passing a part of the airflow within the main air path and a communicating hollow portion for accommodating the arm. The body member is further provided with a mount for fixing the detecting module, thereon, the height of which is different in each variety of the body members, so that the heat wire sensor is always placed in a predetermined metering area within the by-pass path, irrespective of the diameter of the axial bore forming the main air path, when the arm is accommodated in the hollow portion.

REFERENCES:
patent: 4495802 (1985-01-01), Kashiwaya et al.
patent: 4887577 (1989-12-01), Arai et al.

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