公开(公告)号：US06477831B1

公开(公告)日：2002-11-12

申请号：US09350483

申请日：1999-07-09

Applicant: Todd Howard Ballinger ,  Christopher John Bennett ,  Barry John Cooper ,  David Scott Lafyatis

Inventor： Todd Howard Ballinger ,  Christopher John Bennett ,  Barry John Cooper ,  David Scott Lafyatis

IPC: F01N300

CPC classification number: F01N3/0835 ,  F01N3/00 ,  F01N3/0807 ,  F01N3/20 ,  F01N3/2006 ,  F01N3/22 ,  F01N3/30 ,  F01N13/009 ,  F01N13/0093 ,  Y02T10/22 ,  Y02T10/26

Abstract: Engine exhaust gas emissions are cleaned up using apparatus comprising an electrical heater, a first catalyst for oxidizing CO and H2, and a hydrocarbon oxidation catalyst (which may be the same as the first catalyst). Engine management initiates electrical heating upon start-up of the engine, and ensures that there is sufficient CO and H2 and sufficient additional air supplied to the exhaust system, to provide chemical energy in the form of exotherm, whereby the hydrocarbon oxidation catalyst is speeded in reaching light-off temperature.

Abstract translation: 使用包括电加热器，用于氧化CO和H 2的第一催化剂和烃氧化催化剂（其可以与第一催化剂相同）的装置来清洁发动机废气排放物。 发动机管理在发动机启动时启动电加热，并确保有足够的CO和H2以及足够的额外空气供应到排气系统，以放热的形式提供化学能，从而使烃氧化催化剂加速 达到关灯温度。

公开(公告)号：US20080168824A1

公开(公告)日：2008-07-17

申请号：US12008323

申请日：2008-01-10

Applicant: Aleksey Yezerets ,  Sriram S. Popuri ,  Neal W. Currier ,  William Shelbourne Epling ,  Paul James Millington ,  David Scott Lafyatis

Inventor： Aleksey Yezerets ,  Sriram S. Popuri ,  Neal W. Currier ,  William Shelbourne Epling ,  Paul James Millington ,  David Scott Lafyatis

IPC: G01M15/04 ,  F01N9/00 ,  F01N11/00

CPC classification number: F01N11/007 ,  F01N3/0871 ,  F01N2560/025 ,  Y02T10/20 ,  Y02T10/47

Abstract: An OBD system that diagnoses on board the condition of NOx adsorber catalysts in diesel engines and that relies on existing mass-produced exhaust gas oxygen sensor, also known as lambda sensor, technology, and the following established phenomena. In a reducing environment, typical exhaust gas oxygen (lambda) sensors have different sensitivities to various reductants, with sensitivity decreasing in this order: H2>CO>short-chain hydrocarbons>long-chain hydrocarbons. In the process of regeneration of the NOx adsorber catalyst, the original reductant may evolve into a different reductant species, e.g., via reactions such as a water-gas shift (WGS), a reforming, a partial oxidation, etc. This leads to a difference in exhaust gas oxygen sensor readings between the inlet to the catalyst and outlet from the catalyst. It has been observed in diesel engine testing that the ability of the NOx adsorber catalyst to perform such a reductant evolution is correlative to the catalyst's NOx reduction capability.

Abstract translation: 一种OBD系统，用于诊断柴油发动机中NOx吸附剂催化剂的情况，并且依赖于现有的大量生产的废气氧传感器，也称为λ传感器，技术和以下建立的现象。 在还原环境中，典型的废气氧（λ）传感器对各种还原剂具有不同的灵敏度，灵敏度依次降低：H 2短链烃>长链烃。 在NO x吸附剂催化剂的再生过程中，原来的还原剂可以演化成不同的还原剂物质，例如通过反应如水煤气变换（WGS），重整，部分氧化等。这导致了 催化剂入口与催化剂出口之间的排气氧传感器读数差异。 在柴油机测试中已经观察到，NOx吸附剂催化剂进行这种还原剂演变的能力与催化剂的NOx还原能力相关。

公开(公告)号：US07628063B2

公开(公告)日：2009-12-08

申请号：US12008323

申请日：2008-01-10

Applicant: Aleksey Yezerets ,  Sriram S. Popuri ,  Neal W. Currier ,  William Shelbourne Epling ,  Paul James Millington ,  David Scott Lafyatis

Inventor： Aleksey Yezerets ,  Sriram S. Popuri ,  Neal W. Currier ,  William Shelbourne Epling ,  Paul James Millington ,  David Scott Lafyatis

IPC: G01M15/10

CPC classification number: F01N11/007 ,  F01N3/0871 ,  F01N2560/025 ,  Y02T10/20 ,  Y02T10/47

Abstract: An OBD system that diagnoses on board the condition of NOx adsorber catalysts in diesel engines and that relies on existing mass-produced exhaust gas oxygen sensor, also known as lambda sensor, technology, and the following established phenomena. In a reducing environment, typical exhaust gas oxygen (lambda) sensors have different sensitivities to various reductants, with sensitivity decreasing in this order: H2>CO>short-chain hydrocarbons>long-chain hydrocarbons. In the process of regeneration of the NOx adsorber catalyst, the original reductant may evolve into a different reductant species, e.g., via reactions such as a water-gas shift (WGS), a reforming, a partial oxidation, etc. This leads to a difference in exhaust gas oxygen sensor readings between the inlet to the catalyst and outlet from the catalyst. It has been observed in diesel engine testing that the ability of the NOx adsorber catalyst to perform such a reductant evolution is correlative to the catalyst's NOx reduction capability.

Abstract translation: 一种OBD系统，用于诊断柴油发动机中NOx吸附剂催化剂的情况，并且依赖于现有的大量生产的废气氧传感器，也称为λ传感器，技术和以下已建立的现象。 在还原环境中，典型的废气氧（λ）传感器对各种还原剂具有不同的灵敏度，灵敏度依次降低：H2> CO>短链烃>长链烃。 在NO x吸附剂催化剂的再生过程中，原来的还原剂可以演化成不同的还原剂物质，例如通过反应如水煤气变换（WGS），重整，部分氧化等。这导致了 催化剂入口与催化剂出口之间的排气氧传感器读数差异。 在柴油机测试中已经观察到，NOx吸附剂催化剂进行这种还原剂演变的能力与催化剂的NOx还原能力相关。

公开(公告)号：US06634169B1

公开(公告)日：2003-10-21

申请号：US09486486

申请日：2000-06-05

Applicant: Paul Joseph Andersen ,  Todd Howard Ballinger ,  David Scott Lafyatis ,  Raj Rao Rajaram ,  Andrew Peter Walker

Inventor： Paul Joseph Andersen ,  Todd Howard Ballinger ,  David Scott Lafyatis ,  Raj Rao Rajaram ,  Andrew Peter Walker

IPC: F01N300

CPC classification number: F02D41/1475 ,  B01D53/9454 ,  B01D53/9495 ,  F01N3/0842 ,  F01N3/101 ,  F01N3/20 ,  F01N3/2013 ,  F01N3/22 ,  F01N13/009 ,  F01N13/0093 ,  F01N2260/04 ,  F01N2570/04 ,  F01N2610/03 ,  F02D41/024 ,  F02D41/027 ,  F02D41/028 ,  Y02A50/2324 ,  Y02T10/22 ,  Y02T10/26

Abstract: A catalyst system includes a three-way catalyst (TWC) mounted underfloor and an engine management system programmed to initiate an enrichment of the exhaust gases exiting the engine with at least one of CO and hydrocarbons and to add secondary air to the exhaust gases in the exhaust passage upstream of the TWC. This periodic enrichment and addition of secondary air causes catalytic oxidation of the at least one of CO and hydrocarbons over the TWC thereby raising the underfloor TWC temperature to at least 550° C., preferably higher, in order to reduce sulphur poisoning of the catalyst and maintain the desired catalytic activity.

Abstract translation: 一种催化剂体系包括安装在地板下面的三元催化剂（TWC）和一种发动机管理系统，该发动机管理系统被编程为开始利用CO和烃中的至少一种来排出离开发动机的排气，并且在二氧化碳 排气通道在TWC上游。 这种二次空气的周期性富集和添加导致在TWC上的CO和烃中的至少一种的催化氧化，从而将地板下的TWC温度升高至至少550℃，优选更高，以便减少催化剂的硫中毒， 保持所需的催化活性。