公开(公告)号：US20080016852A1

公开(公告)日：2008-01-24

申请号：US11490913

申请日：2006-07-21

Applicant: Dmitry Arie Shamis ,  James Edward McCarthy ,  Johannes Walter Reuter ,  Jiyang Yan

Inventor： Dmitry Arie Shamis ,  James Edward McCarthy ,  Johannes Walter Reuter ,  Jiyang Yan

IPC: F01N3/00

CPC classification number: F01N3/0885 ,  F01N3/0253 ,  F01N3/0842 ,  F01N3/106 ,  F01N3/36 ,  F01N9/002 ,  F01N13/0097 ,  F01N2240/30 ,  F01N2410/00 ,  F01N2610/03 ,  F01N2610/14 ,  F01N2610/1453 ,  F02B37/00 ,  Y02A50/2325 ,  Y02T10/47

Abstract: A diesel engine exhaust aftertreatment system including a DPF and a LNT in that order is operated with simultaneous soot combustion and LNT desulfation. When a control signal to desulfate the LNT is generated, the DPF is heated to ignite combustion of trapped soot. As the trapped soot is combusting in the DPF, reductant is injected downstream of the DPF, but upstream of the LNT at a rate that leaves the exhaust rich, whereby the LNT undergoes desulfation. Soot combustion reduces the fuel penalty for desulfation by removing oxygen from the exhaust. When a reformer is configured upstream of the LNT, soot combustion helps stabilize the reformer operation. In one embodiment, there are two fuel injectors; one upstream of the DPF and one between the DPF and the fuel reformer. Methods are provided for using this type of configuration to operate the reformer when the DPF is not being regenerated.

Abstract translation: 包括DPF和LNT的柴油发动机排气后处理系统按照同时的烟灰燃烧和LNT脱硫来操作。 当产生对硫酸盐脱盐的控制信号时，加热DPF以点燃被捕获的烟灰的燃烧。 当被捕获的烟灰在DPF中燃烧时，还原剂被注入到DPF的下游，而在LNT的上游以使废气富集的速率被注入，由此LNT进行脱硫。 煤烟燃烧通过从排气中除去氧气来减少用于脱硫的燃料损失。 当重整器配置在LNT的上游时，烟灰燃烧有助于稳定重整器操作。 在一个实施例中，有两个燃料喷射器; DPF的一个上游，DPF和燃料重整器之间。 提供了当DPF不被再生时使用这种配置来操作重整器的方法。

公开(公告)号：US20080016851A1

公开(公告)日：2008-01-24

申请号：US11490912

申请日：2006-07-21

Applicant: James Edward McCarthy ,  Jiyang Yan ,  Johannes Walter Reuter ,  Dmitry Arie Shamis

Inventor： James Edward McCarthy ,  Jiyang Yan ,  Johannes Walter Reuter ,  Dmitry Arie Shamis

IPC: F01N5/04 ,  F01N3/00

CPC classification number: F01N3/206 ,  F01N3/0821 ,  F01N2250/14 ,  F01N2340/06 ,  Y02A50/2325

Abstract: One of the inventors' concepts relates to a power generation system, comprising a diesel engine and an exhaust system. The exhaust system comprises a first oxidation catalyst, a fuel reformer, and a LNT. A fuel injector is configured to inject fuel downstream of the oxidation catalyst, but upstream of the reformer. Preferably, the first oxidation catalyst is located near the engine. The first oxidation catalyst can extend the range of exhaust temperatures at which the aftertreatment devices operate by raising the temperature through reactions with residual hydrocarbons in the exhaust. The first oxidation catalyst also stabilizes the reformer operation by reducing the exhaust oxygen concentration. In a preferred embodiment, the engine operation is changed for LNT regenerations to increase the hydrocarbon content of the exhaust.

Abstract translation: 本发明人的概念之一涉及包括柴油发动机和排气系统的发电系统。 排气系统包括第一氧化催化剂，燃料重整器和LNT。 燃料喷射器构造成在氧化催化剂下游但在重整器的上游喷射燃料。 优选地，第一氧化催化剂位于发动机附近。 第一氧化催化剂可以通过与废气中的残余烃反应而升高温度来延长后处理装置的排气温度范围。 第一氧化催化剂还通过降低排气氧浓度来稳定重整器操作。 在优选实施例中，改变发动机操作以进行LNT再生以增加排气的烃含量。

公开(公告)号：US20080016850A1

公开(公告)日：2008-01-24

申请号：US11490911

申请日：2006-07-21

Applicant: Dmitry Arie Shamis ,  James Edward McCarthy

Inventor： Dmitry Arie Shamis ,  James Edward McCarthy

IPC: F01N3/00

CPC classification number: F01N3/206 ,  F01N3/0821 ,  F01N3/0842 ,  F01N2250/14 ,  Y02A50/2325

Abstract: A method is provided for operating a diesel engine exhaust aftertreatment system including a DPF and a LNT. The LNT is regenerated as soot is combusting in the DPF. To accomplish this, reductant is injected between the DPF and the LNT during soot combustion, whereby the LNT experiences rich conditions as the DPF experiences lean conditions. Preferably, the DPF is of small size whereby the DPF is heated easily and needs to be regenerated almost as often as the LNT needs to be denitrated. In an exemplary process, DPF regeneration begins in response to a control signal to denitrate the LNT. Preferably, the reductant is diesel fuel and there is a fuel reformer between the DPF and the LNT. Oxygen consumed by soot combustion reduces the fuel penalty for regenerating the LNT and promotes stable reformer operation. Heat generated in the DPF helps warm the fuel reformer.

Abstract translation: 提供了一种用于操作包括DPF和LNT的柴油发动机排气后处理系统的方法。 当烟尘在DPF中燃烧时，LNT再生。 为了实现这一点，在烟灰燃烧期间，还原剂在DPF和LNT之间被注入，由此当DPF经历稀薄的条件时，LNT具有丰富的条件。 优选地，DPF是小尺寸的，由此DPF被容易地加热并且需要再生几乎与LNT需要脱硝的频率一样多。 在示例性过程中，DPF再生是响应于控制信号而开始的，从而使LNT脱硝。 优选地，还原剂是柴油燃料，并且在DPF和LNT之间存在燃料重整器。 煤烟燃烧消耗的氧气可以降低燃料损失，从而再生LNT并促进稳定的重整器运行。 在DPF中产生的热量有助于燃料重整器的温暖。

公开(公告)号：US20080016849A1

公开(公告)日：2008-01-24

申请号：US11490910

申请日：2006-07-21

Applicant: James Edward McCarthy ,  Dmitry Arie Shamis ,  David Mark Ginter

Inventor： James Edward McCarthy ,  Dmitry Arie Shamis ,  David Mark Ginter

IPC: F01N5/04 ,  F01N3/00

CPC classification number: F01N3/035 ,  F01N3/0253 ,  F01N3/0871 ,  F01N13/0097 ,  F01N2240/30 ,  F01N2610/1453 ,  Y02A50/2325

Abstract: One concept relates to power generation system, comprising a diesel engine, an exhaust manifold, a turbocharger, and an exhaust line in which are configured a fuel reformer and a LNT. A fuel injector is configured to inject fuel into the manifold upstream of the turbine. The high temperatures upstream of the turbine cause the fuel to crack into smaller molecules, releasing heat and providing a boost to the turbocharger. The fuel injected into the manifold also undergoes intense mixing as it passes through the turbocharger. Injecting fuel in this manner provides several benefits for reformer operation. Another concept relates to a manifold fuel injector used to provide fuel for heating a DPF.

Abstract translation: 一个概念涉及发电系统，其包括柴油发动机，排气歧管，涡轮增压器和排气管，其中构成燃料重整器和LNT。 燃料喷射器构造成将燃料喷射到涡轮机上游的歧管中。 涡轮上游的高温使得燃料裂解成更小的分子，释放热量并为涡轮增压器提供增压。 注入歧管的燃料在通过涡轮增压器时也经受强烈的混合。 以这种方式注入燃料为重整器操作提供了几个好处。 另一个概念涉及用于提供用于加热DPF的燃料的歧管燃料喷射器。