Power supply control system for heater used in gas concentration sensor
US6341599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1999 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Oct 13, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1494
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A heater control system is provided for controlling the temperature of a heater used to heat a solid electrolyte-made sensing element of a gas concentration sensor up to a given temperature at which the sensing element is activated to provide a desired gas concentration output for controlling a preselected variable used in a given feedback control system. The heater control system controls an electric power supplied to the heater to bring the temperature of the sensing element into agreement with a target temperature value and determines the target temperature value as a function of the preselected variable used in the feedback control system so that only desired quantity of power may be supplied to the heater, thereby minimizing a consumption of the power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.