公开(公告)号：US20190368402A1

公开(公告)日：2019-12-05

申请号：US16014107

申请日：2018-06-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Eduardo Jose Barrientos Betancourt ,  Roberto Romanato ,  Francesco Bechis ,  Francesco Concetto Pesce ,  Jaime Andres Cespedes Garcia

IPC: F01N3/20 ,  F01N13/00 ,  F01N3/08

Abstract: A method for treating exhaust gas emitted by an internal combustion engine (ICE) in a hybrid architected motor vehicle with an electric motor. The method includes disposing a heater in the exhaust, disposing a first Lean NOx Trap (LNT) downstream of the heater, disposing a second LNT downstream of the first LNT, disposing a passive selective catalytic reduction (SCR) downstream of the second LNT, disposing a hydrocarbon oxidation catalyst downstream of the SCR. The method also includes connecting a controller to the heater, the controller executes a method of controlling the NOx emissions of the ICE, the method includes monitoring a torque demand for the vehicle, determining if the torque demand is large enough to cause the ICE to generate excessive NOx, operating the ICE at a torque less than the torque demand, and operating the motor with the ICE to provide sufficient torque to satisfy the torque demand.

公开(公告)号：US10690031B2

公开(公告)日：2020-06-23

申请号：US16014107

申请日：2018-06-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Eduardo Jose Barrientos Betancourt ,  Roberto Romanato ,  Francesco Bechis ,  Francesco Concetto Pesce ,  Jaime Andres Cespedes Garcia

IPC: F01N3/20 ,  F01N3/08 ,  F01N13/00

Abstract: A method for treating exhaust gas emitted by an internal combustion engine (ICE) in a hybrid architected motor vehicle with an electric motor. The method includes disposing a heater in the exhaust, disposing a first Lean NOx Trap (LNT) downstream of the heater, disposing a second LNT downstream of the first LNT, disposing a passive selective catalytic reduction (SCR) downstream of the second LNT, disposing a hydrocarbon oxidation catalyst downstream of the SCR. The method also includes connecting a controller to the heater, the controller executes a method of controlling the NOx emissions of the ICE, the method includes monitoring a torque demand for the vehicle, determining if the torque demand is large enough to cause the ICE to generate excessive NOx, operating the ICE at a torque less than the torque demand, and operating the motor with the ICE to provide sufficient torque to satisfy the torque demand.