公开(公告)号：US09903248B2

公开(公告)日：2018-02-27

申请号：US15097417

申请日：2016-04-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Kushal Narayanaswamy ,  Cherian A. Idicheria ,  Paul M. Najt ,  Gerald A. Szekely, Jr. ,  Joel G. Toner

IPC: F01N3/00 ,  F01N3/28 ,  F01N3/20

CPC classification number: F01N3/2882 ,  F01N3/021 ,  F01N3/101 ,  F01N3/20 ,  F01N3/2066 ,  F01N13/009 ,  F01N2240/28 ,  F01N2430/06 ,  Y02T10/22 ,  Y02T10/24

Abstract: An exhaust aftertreatment system for purifying an exhaust gas feedstream that is expelled from an internal combustion engine that is operable at an air/fuel ratio that is lean of stoichiometry is described. The exhaust aftertreatment system includes a barrier discharge plasma reactor that is disposed upstream relative to a catalytic reactor and electrically connected to a plasma controller. The barrier discharge plasma reactor is controlled to generate ozone from constituents of the exhaust gas feedstream when the internal combustion engine is operating at a lean air/fuel ratio and at a low temperature condition. The generated ozone reacts, in the catalytic reactor, to oxidize non-methane hydrocarbons contained in the exhaust gas feedstream when the internal combustion engine is operating at lean air/fuel ratio and at low temperature conditions.

公开(公告)号：US09512793B2

公开(公告)日：2016-12-06

申请号：US13652549

申请日：2012-10-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Joel G. Toner ,  Kushal Narayanaswamy ,  Gerald A. Szekely, Jr. ,  Paul M. Najt

IPC: F01N3/20 ,  F02D41/00 ,  F01N3/10 ,  F02D41/02

CPC classification number: F02D41/008 ,  F01N3/101 ,  F01N3/2066 ,  F01N3/208 ,  F01N2240/25 ,  F01N2610/02 ,  F02D41/0235 ,  Y02T10/22 ,  Y02T10/24

Abstract: A method for controlling ammonia generation in an exhaust gas feedstream output from an internal combustion engine equipped with an exhaust aftertreatment system including a first aftertreatment device includes executing an ammonia generation cycle to generate ammonia on the first aftertreatment device. A desired air-fuel ratio output from the engine and entering the exhaust aftertreatment system conducive for generating ammonia on the first aftertreatment device is determined. Operation of a selected combination of a plurality of cylinders of the engine is selectively altered to achieve the desired air-fuel ratio entering the exhaust aftertreatment system.

Abstract translation: 一种用于控制从配备有包括第一后​​处理装置的排气后处理系统的内燃机输出的废气原料流中的氨生成方法，包括在第一后处理装置上执行氨生成循环以产生氨。 确定从发动机输出并进入排气后处理系统的有利于在第一后处理装置上产生氨的期望的空燃比。 选择性地改变发动机的多个气缸的选定组合的操作，以实现进入排气后处理系统的期望空燃比。

公开(公告)号：US10519883B2

公开(公告)日：2019-12-31

申请号：US15995579

申请日：2018-06-01

Applicant: GM Global Technology Operations LLC

Inventor： Arun S. Solomon ,  Kushal Narayanaswamy ,  Gerald A. Szekely, Jr. ,  David P. Sczomak

IPC: F02D41/02 ,  F02M26/47 ,  F02D9/02 ,  F01N3/20 ,  F02D13/02 ,  F02P5/15 ,  F02D41/00 ,  F02D41/30 ,  F01N9/00

Abstract: A catalyst temperature control system of a vehicle includes a fuel control module configured to control fuel injection based on a target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and a target fuel injection start timing. An exhaust gas recirculation (EGR) control module is configured to control an EGR valve based on a target EGR opening. An adjustment module is configured to, when a temperature of a catalyst in an exhaust system is less than a sum of a predetermined light-out temperature of the catalyst and a predetermined temperature and the target air/fuel ratio is fuel lean relative to the stoichiometric air/fuel ratio, based on a comparison of an engine speed and a predetermined engine speed, selectively adjust at least one of: a target throttle opening, a target spark timing, the target fuel injection start timing, the target air/fuel ratio, and the target EGR opening.

公开(公告)号：US09926825B2

公开(公告)日：2018-03-27

申请号：US15132601

申请日：2016-04-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Cherian A. Idicheria ,  Kushal Narayanaswamy ,  Paul M. Najt ,  Gerald A. Szekely, Jr. ,  Joel G. Toner

IPC: F01N3/00 ,  F01N9/00 ,  F01N3/20

CPC classification number: F01N9/00 ,  F01N3/021 ,  F01N3/101 ,  F01N3/2066 ,  F01N13/009 ,  F01N2240/28 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/22 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust aftertreatment system for purifying an exhaust gas feedstream expelled from an internal combustion engine that is operable at an air/fuel ratio that is lean of stoichiometry is described. The exhaust aftertreatment system includes a plasma reactor disposed upstream of a selective catalytic reactor device. The plasma reactor is electrically connected to a plasma controller. The plasma controller controls the plasma reactor to generate ozone from constituents of the exhaust gas feedstream, and the ozone reacts to oxidize nitrogen oxide contained in the exhaust gas feedstream to form nitrogen dioxide. The nitrogen dioxide reacts with a reductant in the selective catalytic reactor device to form elemental nitrogen and water.