Electronically heated NOx adsorber catalyst
US8661790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2011 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Feb 24, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas treatment system for an internal combustion engine is provided, and includes an exhaust gas conduit, an upstream selective catalytic reduction (“SCR”) device, an electrically heated catalyst (“EHC”) device, an oxidation catalyst (“OC”) device, a downstream SCR device, and a control module. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the upstream SCR device and is selectively activated to produce heat. The OC device is in fluid communication with the exhaust gas conduit, and is selectively heated by the EHC device. At least one of the EHC device and the OC device have a NOx adsorber catalyst disposed thereon for selectively adsorbing NOx below a threshold temperature and substantially releasing NOx above the threshold temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.