Exhaust gas purification apparatus of internal combustion engine
US9951670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2016 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | May 6, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0802
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas purification apparatus for an internal combustion engine, includes an oxygen ion conductor which can conduct oxygen ions when a voltage is applied to the conductor and a NOx absorption/discharge device. The NOx absorption/discharge device is formed by a first electrode provided on a first surface of the oxygen ion conductor and a second electrode including silver and provided on a second surface of the oxygen ion conductor opposite to the first surface across the oxygen ion conductor. The apparatus applies a voltage between the first and second electrodes such that oxygen ions move through the oxygen ion conductor from the first electrode toward the second electrode when satisfied is a purification condition that nitrogen oxide discharged from the NOx absorption/discharge device can be purified in the exhaust passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.