Method and particle sensor for detecting particles in an exhaust gas stream
US9267865B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2011 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jul 10, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1466
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting particles, for example in an exhaust gas stream of a vehicle in which the exhaust gas stream is guided along a duct, includes using a particle sensor that has at least two electrodes arranged in the duct. The method includes applying a first voltage and a second voltage to the electrodes to produce a first electric field and a second electric field between the electrodes. The method also includes ascertaining a first capacitance value corresponding to the first electric field and a second capacitance value corresponding to the second electric field of a capacitor formed by the electrodes. Information relating to the particles contained in the exhaust gas stream is ascertained from the first capacitance value and the second capacitance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.