Exhaust aftertreatment system and method of use for lean burn internal combustion engines
US7571602B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2006 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Jun 8, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention is an aftertreatment system for lean burn internal combustion engines. The present invention provides a multiple branch lean NOx trap, or LNT, with a diverter valve operable to selectively direct lean exhaust flow to one portion of the LNT while another portion of the LNT regenerates in a low oxygen environment. Additionally, the present invention employees a continuously operating side stream exhaust fuel reformer that delivers a reductant, such as partially oxidized (POx) gas or reformate, to the LNT for regeneration. The present invention also provides a method of exhaust aftertreatment of a lean burn internal combustion engine utilizing the system provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.