Air flow rate measuring device for an internal combustion engine
US5186044A · kind A · utility
35Cited by
2References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 1, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Feb 1, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F5/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air flow rate measuring device for an internal combustion engine has a housing adapted to be inserted through a wall, the housing defining an air intake main passage of the engine. The housing also has an auxiliary air passage for a portion of the intake air and the housing supports a circuit board containing a hot wire and a temperature sensitive resistor, the hot wire being adapted to measure the air flow rate in the auxiliary passage. In a feature of the invention the housing has a metallic wall which is exposed to air flow in the main passage so that improved temperature reliability of the device may be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.