Title:
Lean NOX trap desulfurization method
Document Type and Number:
Japanese Patent JP6018697
Kind Code:
B2
Abstract:
A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel ( Q 2 ) required to reach a relatively rich target exhaust air fuel ratio (AFR rich ) on the basis of a measured air flow; determining a heating-contributing fuel value ( ·Q 2 ) required to reach or maintain a target desulfation temperature in said NOx adsorber by way of an exothermal reaction; calculating a target air flow (Air tgt ) corresponding to the air flow required for a substantially stoichiometric combustion of a torque-contributing main fuel quantity ( Q 1 ) together with said heating-contributing fuel value ( ·Q 2 ) ; and causing the engine to inject said post fuel amount ( Q 2 ) and said main fuel quantity ( Q 1 ) while controlling the air flow to meet said target air flow ( Air tgt ) .
Inventors:
Schmidt, Julian
Eric, Michel
Eric, Michel
Application Number:
JP2015503795A
Publication Date:
November 02, 2016
Filing Date:
March 06, 2013
Export Citation:
Assignee:
Delphi International Operations Luxembourg S.A.Y.L.El
International Classes:
F02D41/40; F01N3/08; F01N3/20; F01N3/28; F02D41/38; F02D45/00
Domestic Patent References:
| JP2005098269A | ||||
| JP2010127182A | ||||
| JP2007332852A | ||||
| JP2010121505A | ||||
| JP9014026A | ||||
| JP2008069728A |
Foreign References:
| US20050000208 |
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Tatsumi Ono
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Tatsumi Ono