公开(公告)号：US20200072109A1

公开(公告)日：2020-03-05

申请号：US16466473

申请日：2016-12-16

Applicant: VOLVO TRUCK CORPORATION

Inventor： Fredrik Blomgren ,  Soran Shwan ,  Mathias Magnussson

IPC: F01N3/20 ,  F01N13/00 ,  F01N3/10 ,  B01D53/94 ,  B01J29/072 ,  B01J23/22 ,  B01J23/04

Abstract: The invention provides an exhaust gas treatment system (8) arranged to receive exhaust gases from an internal combustion engine (6), the system comprising an exhaust conduit (10) and a selective catalytic reduction (SCR) catalyst (12) provided in the exhaust conduit (10), characterized in that the system comprises a nitrogen dioxide reducing unit (701) provided in the exhaust conduit (10) upstream of the SCR catalyst (12), wherein the nitrogen dioxide reducing unit (701) is adapted to reduce, at a low temperature, nitrogen dioxide (NO2) in exhaust gases received by the nitrogen dioxide reducing unit (701).

公开(公告)号：US11492946B2

公开(公告)日：2022-11-08

申请号：US17296031

申请日：2018-11-26

Applicant: VOLVO TRUCK CORPORATION

Inventor： Lennart Andersson ,  Soran Shwan ,  Mathias Magnussson

IPC: F01N3/20 ,  F01N13/00 ,  B01D53/94 ,  F01N3/10

Abstract: An aftertreatment system (100) connected downstream an internal combustion engine arrangement (102) for receiving combustion gas exhausted from the internal combustion engine arrangement (102) during operation thereof, the aftertreatment system (100) comprising a primary aftertreatment system (104) comprising a first catalytic reduction arrangement (106); a secondary reduction system (108) comprising a second catalytic reduction arrangement (110).

公开(公告)号：US11268415B2

公开(公告)日：2022-03-08

申请号：US16615273

申请日：2017-06-02

Applicant: VOLVO TRUCK CORPORATION

Inventor： Soran Shwan ,  Lars Carlhammar ,  Fredrik Blomgren

IPC: F01N3/08 ,  F01N3/20 ,  F01N3/10 ,  F01N9/00

Abstract: The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.

公开(公告)号：US11454151B2

公开(公告)日：2022-09-27

申请号：US17408263

申请日：2021-08-20

Applicant: Volvo Truck Corporation

Inventor： Fredrik Blomgren ,  Soran Shwan ,  Kunpeng Xie

IPC: F01N3/029 ,  F01N13/00 ,  F01N3/035

Abstract: A method is disclosed for cleaning a component of an exhaust aftertreatment system located downstream of a combustion engine in an exhaust flow path delimited by an outer wall. The exhaust aftertreatment system includes a first device releasably mounted in the outer wall upstream of the component and a second device releasably mounted in the outer wall downstream of the component, each of the devices being a sensor or an injector. The method includes sealing the exhaust flow path upstream of the first device and downstream of the second device, removing at least the first and second devices, thereby providing at least two openings in the outer wall, so that a cleaning flow path is provided, and introducing cleaning fluid into at least one of the openings, so that the cleaning fluid flows across the component via the cleaning flow path.

公开(公告)号：US20220056828A1

公开(公告)日：2022-02-24

申请号：US17408263

申请日：2021-08-20

Applicant: Volvo Truck Corporation

Inventor： Fredrik Blomgren ,  Soran Shwan ,  Kunoeng Xie

IPC: F01N3/029 ,  F01N3/035

Abstract: A method is disclosed for cleaning a component of an exhaust aftertreatment system located downstream of a combustion engine in an exhaust flow path delimited by an outer wall. The exhaust aftertreatment system includes a first device releasably mounted in the outer wall upstream of the component and a second device releasably mounted in the outer wall downstream of the component, each of the devices being a sensor or an injector. The method includes sealing the exhaust flow path upstream of the first device and downstream of the second device, removing at least the first and second devices, thereby providing at least two openings in the outer wall, so that a cleaning flow path is provided, and introducing cleaning fluid into at least one of the openings, so that the cleaning fluid flows across the component via the cleaning flow path.