Dust defelector for silicon mass airflow sensor
US4981035A · kind A · utility
23Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Feb 2, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The silicon sensing element of a mass airflow sensor is shielded from direct impact by large dust particles by means of a plastic deflector that is disposed in spaced upstream relationship to the entrance of a by-pass venturi containing the sensor. The deflector is supported on a mesh screen and is arranged such that air can enter the by-pass venturi after having passed by and behind the deflector. In another embodiment the deflector is an airfoil that is part of a probe assembly containing the sensing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.