公开(公告)号：US20230203976A1

公开(公告)日：2023-06-29

申请号：US17562463

申请日：2021-12-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rahul MITAL ,  Jianwen LI ,  Eric Darvin Thomas

IPC: F01N3/20 ,  F01N3/021

CPC classification number: F01N3/2066 ,  F01N3/021 ,  F01N2570/14 ,  F01N2570/18

Abstract: An exhaust system includes a selective catalytic reduction (SCR) catalyst, a diesel oxidation catalyst, and an ammonia slip catalyst. The SCR catalyst is configured to reduce nitrogen oxide in exhaust gas produced by a diesel engine. The diesel oxidation catalyst is configured to reduce particulate matter, hydrocarbon, and carbon monoxide in the exhaust gas. The diesel oxidation catalyst is disposed downstream of the first SCR catalyst. The ammonia slip catalyst is configured to reduce ammonia in the exhaust gas. The ammonia slip catalyst is disposed downstream of the first SCR catalyst and upstream of the first diesel oxidation catalyst.

公开(公告)号：US09964010B2

公开(公告)日：2018-05-08

申请号：US15151955

申请日：2016-05-11

Applicant: GM Global Technology Operations LLC

Inventor： Ryan Calkin ,  Eric Darvin Thomas

IPC: F01M11/02 ,  F02B37/24

CPC classification number: F01M11/02 ,  F01M2011/021 ,  F02B37/18 ,  F02B37/24 ,  F02B39/00 ,  F02B39/14 ,  F02B39/16 ,  Y02T10/144

Abstract: An internal combustion engine, includes a turbocharger with a variable geometry turbine having an actuator shaft passing through the turbocharger housing. The actuator shaft opening is vented to the engine crankcase for diverting exhaust that passes through the actuator shaft opening to the crankcase instead of being released to the under-hood environment.

公开(公告)号：US12140064B1

公开(公告)日：2024-11-12

申请号：US18654370

申请日：2024-05-03

Applicant: GM Global Technology Operations LLC

Inventor： Bryan D. Axe ,  Sarah Funk ,  Eric Darvin Thomas

IPC: F01N3/20 ,  B01D46/82 ,  B01D53/94 ,  F01N3/023 ,  F01N3/10 ,  F01N3/28 ,  F01N13/00 ,  F02D41/00 ,  F02D41/02 ,  F02D41/40

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.