Low temperature diesel aftertreatment regeneration strategy
US12140064B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2024 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | May 3, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2900/1606
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of aftertreatment regeneration includes routing exhaust gases from a diesel engine through an exhaust system and initiating a nitrogen dioxide based aftertreatment regeneration of a diesel particulate filter (DPF) by at least partially de-activating a first DEF injector and an upstream selective catalyst reducer (SCR), increasing levels of Nitric Oxide within exhaust gas from the engine, establishing and maintaining an target exhaust gas temperature at an inlet of the DPF by actively controlling combustion characteristics of the engine, converting, with a diesel oxidation catalyst, (DOC) NO within the exhaust gas entering the DOC to NO2, and converting solid carbon-based particulate matter that has accumulated within the DPF to gaseous carbon dioxide (CO2) and NO by using NO2 as an oxidant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.