Plasma reactor for treating auto emissions—durable and low cost—curved shapes
US6878030B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2000 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Mar 2, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N3/0892
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A non-thermal plasma reactor for conversion of exhaust gas constituents is characterized by a reactor element prepared from a curved, swept-shaped substrate specifically designed for fabrication via extrusion. The as-extruded curved substrate comprises a thick outer wall surrounding a plurality of channels separated by dielectric barriers. Selected channels are coated with a conductive material to form conductor channels. The prepared reactor element preferably comprises multiple concentric exhaust channels, multiple concentric conductor channels having alternating polarity, each connected to its respective polarity via bus paths, in-line structural support ligaments for providing optimal structural support while preventing exhaust leakage, and thick outer walls providing high crush resistance and allowing robust mounting into the reactor housing.The nested, concentric arrangement and curved shape substrate advantageously enhances the reactor's ability to adapt to fit various vehicle sizes. High durability is afforded by the thick outer walls, and preferably, the inclusion of integral structural support ligaments. Fabrication of the extruded curved substrate is from material such a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.