Apparatus for burnoff of a resistor, in particular of a hot wire in an air flow rate meter of an internal combustion engine
US4341114A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | May 30, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is proposed for burnoff of deposits from at least hot wire and/or hot film resistors in the air flow rate measurement circuit of an internal combustion engine, wherein during the burnoff procedure a separate electric current circuit is furnished to provide for the resistors to be burned off with high electric currents. In one embodiment, the resistors to be burned off are placed in a separate current path between two operational voltage leads, while in another embodiment, that there is provided a parallel circuit arrangement of individual resistors to be burned off, whereupon the total electric current flow through the individual resistors is then seprately controlled in closed-loop fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.