Measuring and testing – Volume or rate of flow – Proportional
Patent
1993-09-27
1995-01-17
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Proportional
731182, G01F 168
Patent
active
053816919
ABSTRACT:
An air flow meter comprises a main passage for an axial main air flow; an axial subpassage for air flow, disposed in the main passage and formed so that part of the air in the main passage is taken in at an upstream side thereof and flows in the same direction as the axial main air flow; a radial subpassage for air flow, intersecting the axial subpassage at a downstream side of the axial subpassage so that air from the axial subpassage flows into the radial subpassage and is divided into two radial air flows running in different radial directions; the air having passed through the radial subpassage joining the axial main air flow. An air flow sensing means is disposed in the radial subpassage for sensing a flow rate of air therein, and a projection is disposed in the radial subpassage around the intersection of the axial and radial subpassages, for suppressing turbulence of air flow around the intersection.
REFERENCES:
patent: 3314290 (1967-04-01), Peranio
patent: 3735752 (1973-05-01), Rodder
patent: 4709581 (1987-12-01), Nishimura et al.
patent: 4887577 (1989-12-01), Arai et al.
Arai Nobukatsu
Igarashi Shinya
Kobayashi Chihiro
Maeda Haruhiko
Matsukura Tetsuo
Goldstein Herbert
Hitachi , Ltd.
Hitachi Automotive Engineering Co.
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