Measuring and testing – Volume or rate of flow – System
Patent
1977-07-07
1978-08-08
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
System
73118, G01F 166
Patent
active
041049152
ABSTRACT:
A device for determining the rate of flow of air in the intake duct of an internal combustion engine comprises a detector duct of generally rectangular cross section housing two ultrasonic detectors one at each end, lying adjacent the detector duct is an intake duct having an inlet air filter which also serves as an ultrasonic acoustic filter. Adjacent ends of the intake and detector ducts are joined by a deflector which turns the air through 180.degree. as it passes from the intake duct to the detector duct. Within the deflector are fins which guide the air and turn it with the minimum of pressure loss and turbulence; adjacent the deflector in the intake duct is located a set of fins serving to diffuse the air as it passes, to reduce any temperature or velocity gradient across its width, and adjacent the deflector in the detector duct is located a set of fins serving to guide the air stream and reduce turbulence maintaining the even pressure and temperature across the stream.
REFERENCES:
patent: 3956928 (1976-05-01), Barrera
patent: 3964309 (1976-06-01), Husse et al.
patent: 4014210 (1977-03-01), Husse et al.
FIAT Societa per Azioni
Ruehl Charles A.
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