公开(公告)号：US20160230685A1

公开(公告)日：2016-08-11

申请号：US15041731

申请日：2016-02-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Davide Francesco MERCURI ,  Paolo OLMO ,  Davide GESSAROLI ,  Giorgio NATI

IPC: F02D41/02 ,  F02B37/16 ,  F02D41/00 ,  F01N3/08

CPC classification number: F02D41/0275 ,  F01N3/0885 ,  F02B29/04 ,  F02B37/168 ,  F02B37/18 ,  F02D41/0007 ,  F02D2009/0225 ,  F02D2009/0228 ,  F02M26/05 ,  F02M26/25 ,  Y02T10/144 ,  Y02T10/146

Abstract: A method and apparatus for regenerating a Lean NOx Trap in an internal combustion engine is disclosed. The internal combustion engine includes a Lean NOx Trap, a turbocharger having a turbine. An electronic control unit is configured to execute a regeneration event of the Lean NOx Trap, and regulate a position of an actuator affecting a rotating speed of the turbine using a closed-loop control strategy of an air pressure into an intake duct downstream of a compressor of the turbocharger and upstream of a throttle valve during the execution of the regeneration event.

Abstract translation: 公开了一种用于再生内燃机中的精益NOx捕集阱的方法和装置。 内燃机包括精益NOx捕集阱，具有涡轮的涡轮增压器。 电子控制单元被配置为执行精益NOx捕集器的再生事件，并且使用空气压力的闭环控制策略来调节影响涡轮机的转速的致动器的位置到压缩机下游的进气管道 的涡轮增压器，并且在执行再生事件期间在节流阀的上游。

公开(公告)号：US20190101076A1

公开(公告)日：2019-04-04

申请号：US15721245

申请日：2017-09-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Giorgio NATI ,  Paolo OLMO ,  Nicola Pio SACCO ,  Davide GESSAROLI

IPC: F02D41/28 ,  F02D41/02 ,  F02D41/14 ,  F02D9/10

Abstract: A method and apparatus is provided for regenerating an after-treatment device associated with an exhaust system of an internal combustion engine. A lambda error control provides a lambda error signal based upon a measured lambda value and a predetermined lambda value indicative of rich operation. An after-injection map provides an after-injection preset based upon a speed and a torque of the internal combustion engine. A main injection map provides a torque-making main injection preset based upon the speed of the internal combustion engine and the torque of the internal combustion engine. A controller is configured to provide an after-injection quantity signal based upon the after-injection preset, the lambda error signal and a main injection quantity signal based upon the main injection preset and the lambda error signal such that the measured lambda value is maintained within a regeneration range.

公开(公告)号：US20170167346A1

公开(公告)日：2017-06-15

申请号：US15375960

申请日：2016-12-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Francesco BARBA ,  Roberto ROMANATO ,  Paolo OLMO

IPC: F01N9/00 ,  F01N3/20 ,  B01D53/04 ,  F01N13/00 ,  B01D53/94 ,  F01N3/08 ,  F01N11/00

CPC classification number: F01N9/00 ,  B01D53/0454 ,  B01D53/9481 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/0885 ,  F01N3/2013 ,  F01N3/2026 ,  F01N11/002 ,  F01N13/009 ,  F01N2570/14 ,  F01N2900/0416 ,  F01N2900/08 ,  F01N2900/1404 ,  F01N2900/1622 ,  Y02T10/26 ,  Y02T10/47

Abstract: A method and system for operating an aftertreatment system of an internal combustion engine is disclosed. A value of a storage efficiency for the lean nitrogen-oxide trap is determined. A value of an exhaust gas temperature is measured upstream of the lean nitrogen-oxide trap. An electric heated catalyst enabling condition may be fulfilled if the storage efficiency of the lean nitrogen-oxide trap is smaller than a threshold value thereof and the value of the exhaust gas temperature upstream of the lean nitrogen-oxide trap is greater than a lower threshold value and less than an upper threshold value. The electric heated catalyst is activated if the enabling condition is fulfilled. An inhibition enabling condition may be fulfilled if the value of storage efficiency is less than a second threshold value and the electric heated catalyst is deactivated and a denitrification of the lean nitrogen-oxides trap is started.