公开(公告)号：US09850795B2

公开(公告)日：2017-12-26

申请号：US14779019

申请日：2013-04-03

Applicant: RENAULT TRUCKS ,  VOLVO TRUCK CORPORATION

Inventor： Eduard Emil Iojoiu ,  Raphaël Pourret ,  Martin Petersson ,  Björn Häggendal ,  Johan Dahl

IPC: F01N3/18 ,  F01N3/20 ,  F02D41/02 ,  F01N3/027 ,  F01N3/035 ,  F01N3/023 ,  F01N3/10 ,  F01N13/00 ,  F01N9/00 ,  F02D41/14

CPC classification number: F01N3/2006 ,  F01N3/023 ,  F01N3/0231 ,  F01N3/0232 ,  F01N3/027 ,  F01N3/035 ,  F01N3/103 ,  F01N3/2066 ,  F01N9/002 ,  F01N9/005 ,  F01N13/009 ,  F01N2240/16 ,  F01N2900/0412 ,  F01N2900/0418 ,  F01N2900/0422 ,  F01N2900/0601 ,  F01N2900/0602 ,  F01N2900/08 ,  F01N2900/1404 ,  F01N2900/1602 ,  F01N2900/1606 ,  F01N2900/1621 ,  F02D41/029 ,  F02D41/1467 ,  F02D2041/1433 ,  F02D2200/0812 ,  Y02T10/47

Abstract: A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed.

公开(公告)号：US12064756B2

公开(公告)日：2024-08-20

申请号：US17778063

申请日：2019-11-25

Applicant: VOLVO TRUCK CORPORATION

Inventor： Eduard Emil Iojoiu ,  Patrice Keghelian

IPC: B01J38/62 ,  B01D47/12 ,  B01D53/94 ,  B01J29/85 ,  B01J29/90 ,  B01J37/06 ,  B01J38/48 ,  F01N1/08 ,  F01N3/038 ,  F01N3/04 ,  F01N3/20 ,  F01N3/28 ,  F01N3/30 ,  F01N13/12

CPC classification number: B01J38/62 ,  B01D53/9431 ,  B01J29/85 ,  B01J29/90 ,  F01N1/08 ,  F01N3/2006 ,  F01N3/208 ,  F01N3/2885 ,  F01N3/30 ,  B01D47/12 ,  B01D2255/50 ,  B01D2321/28 ,  B01J37/06 ,  B01J38/48 ,  F01N3/038 ,  F01N3/04 ,  F01N3/206 ,  F01N3/2882 ,  F01N3/2896 ,  F01N13/12 ,  F01N2230/04 ,  F01N2370/04 ,  F01N2610/02

Abstract: The invention concerns a method for unblocking pores in a metal zeolite based selective catalytic reduction (SCR) catalyst. The method includes filling, at least partially, the SCR catalyst with a liquid, the liquid being preferably distilled water. The method includes letting said liquid inside the SCR catalyst enough time to allow said liquid to dissolve, at least partially, the obstructions and to penetrate into the pores. The method includes heating the SCR catalyst at a temperature above the ebullition temperature of the liquid so as to vaporize the part of the liquid remained into the pores, and generate steam flows through the obstructions, the steam flows removing the obstructions and unblocking the pores, wherein no hydrocarbons are injected during the step of heating.