Compensator circuitry and method for an oxygen sensor
US10746118B1 · kind B1 · utility
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5References
16Claims
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Key dates
| Filing date | Jul 2, 2019 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Jul 2, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/281
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Compensator circuitry is provided for an oxygen sensor which includes a pump cell and a reference cell. The compensator circuitry includes a feedback control loop which maintains the reference cell at a reference voltage. The feedback control loop includes a digital compensator which determines and outputs a compensation current to the pump cell dependent on a reference voltage measured from the reference cell. The digital compensator also suspends the determination and output of the compensation current for a set time which is dependent on detection of edges in an oxygen sensor heater Pulse Width Modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.