Method for diagnosing a lambda sensor during ongoing operation
US10697930B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Nov 12, 2014 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1454
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for diagnosing a lambda sensor during ongoing operation. It includes energizing the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current and ascertaining a malfunction of the lambda sensor from voltages, which are measured at a pump cell and/or a Nernst cell of the lambda sensor during the energization by the pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.