System, apparatus, and method for protection and cleaning of exhaust gas sensors
US11549424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2020 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Nov 18, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2560/07
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A system, apparatus, and method are provided for preventing the accumulation of particulate matter such as combustion soot on sensors positioned in exhaust gas conduits of internal combustion engines. In an embodiment, the apparatus includes a device for deflecting soot deposits from sensor surfaces. In an embodiment, the apparatus includes a device employing a surface acoustic wave generator for dislodging soot accumulation or measuring soot accumulations to trigger burn-off events. In an embodiment, an injector injects pressurized bursts of gas toward a sensor surface to dislodge particulate matter. In an embodiment, charged electrodes attract charged particles of soot from the exhaust gas flow to form deposits that are then subject to burn-off events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.