Gas sensor control apparatus controlling output characteristic of gas sensor
US8702937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2011 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jun 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/409
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensor control apparatus is provided which controls an operation of a gas sensor made up of a solid electrolyte body and a pair of electrodes to output a signal indicating the concentration of a given gas component contained in gas. The gas sensor control apparatus includes a constant current circuit that is connected electrically to one of the electrodes of the gas sensor and supplies a constant current thereto and a controller. The controller supplies a constant current to the gas sensor so that it flows from one of the electrodes to the other in a selected direction, thereby changing a response time the gas sensor takes to react to a change in concentration of the gas component. This results in an increased accuracy, for example, in controlling an air-fuel ratio of a mixture to an internal combustion engine in an engine control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.