Device for determining the flow rate of a flowing medium
US4527427A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1983 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Nov 17, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/68
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device is proposed for determining the flow rate of a flowing medium, in particular the flow rate of air aspirated by an internal combustion engine which includes at least two temperature-dependent measuring resistors which are exposed to the flowing medium, each disposed in a separate bridge circuit, heated to different temperatures and regulated such as to be constant. The measuring resistors as well as the other bridge resistors are embodied as film resistors and are disposed opposite one another, each on a different side of a substrate. One signal per bridge, dependent on the currents flowing through the bridges, is supplied to a signal processing unit, the output variable of which represents a standard for the flow rate of the flowing medium that is independent of the temperature of the flowing medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.