Air flow sensor
US4571996A · kind A · utility
30Cited by
21References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Aug 10, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F5/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air flow sensor (10) as may be used to measure input air to an internal combustion engine has an aerodynamically designed impact tube (16) for diverting bypass air to a pair of sensors (28, 30). Downstream from the impact tube (16) is a venturi section providing exhaust means for the bypass air. The exhaust path configuration for the bypass air shields the sensors (28, 30) from a reverse pressure wave which can result from an engine backfire. The impact tube (16) operates to integrate the air velocity over a full radius of the air flow body (14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.