Device for flowthrough rate measurement in an internal combustion engine
US4420971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Jun 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6983
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device is proposed for measuring the flowthrough rate in an internal combustion engine, particularly for measuring the air throughput in the intake tube. The device has a measurement bridge functioning on the principle of constant-temperature control, and also a regulating deivce for the total bridge current during the burn-off phase of the hot wire or hot film as one of the bridge resistors. The essential feature is that the bridge circuit assembly comprises at least three voltage dividers; for the purpose of regulating the electric current in the burn-off phase and during measurement operation, respective control voltages are picked up between two different voltage dividers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.