Measuring and testing – Simulating operating condition – Marine
Patent
1989-08-22
1990-12-04
Raevis, Robert
Measuring and testing
Simulating operating condition
Marine
G01M 1500
Patent
active
049744453
ABSTRACT:
The present invention whose object is to provide a hot wire type of flow meter capable of accurately detecting a flow rate under various conditions required for satisfying a desire for low fuel consumption of an engine system and space saving in an engine room, the present invention being characterized in a hot wire type of air flow meter including a main flow passage forming an air intake flow passage of an internal combustion engine, a hot wire element measuring intake air, and a bypass having the hot wire element therein and disposed in the main flow passage, the hot wire type of air flow meter comprising: a flow passage forming the bypass, and formed in the axial direction of the main flow passage; and a flow passage forming the bypass and formed in the radial direction of the main flow passage, the flow passage having a structure designed in such a manner that the upper stream portion of an outlet portion thereof projects over the lower stream portion of the same.
REFERENCES:
patent: 4468957 (1984-09-01), Sumal
patent: 4624134 (1986-11-01), Nagano
patent: 4776213 (1988-10-01), Blechinger et al.
patent: 4870857 (1989-10-01), Smith
Arai Nobukatsu
Matsukura Tetsuo
Osawa Tadao
Sekine Yoshihito
Tokuda Hiroatsu
Hitachi , Ltd.
Raevis Robert
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