METHOD FOR PRODUCING A STREAM OF HOT COMBUSTION EXHAUST GASES AT A SETTABLE TEMPERATURE, APPARATUS FOR CARRYING OUT THE METHOD AND USE OF THE COMBUSTION EXHAUST GASES FOR THE TARGETED AGEING OF CATALYSTS
    81.
    发明申请
    METHOD FOR PRODUCING A STREAM OF HOT COMBUSTION EXHAUST GASES AT A SETTABLE TEMPERATURE, APPARATUS FOR CARRYING OUT THE METHOD AND USE OF THE COMBUSTION EXHAUST GASES FOR THE TARGETED AGEING OF CATALYSTS 有权
    用于生产在一定温度下的热燃烧排气流的方法,用于实施方法和使用燃烧排放气体用于目标催化剂老化的方法

    公开(公告)号:US20090126354A1

    公开(公告)日:2009-05-21

    申请号:US11722123

    申请日:2005-12-17

    IPC分类号: F01N3/04 F01N3/20

    摘要: A stream of exhaust gases from the combustion of hydrocarbon-containing fuels with a variable temperature can be produced by dividing the exhaust gases into two separate part-streams, cooling one part-stream and then combining the two part-streams again. The temperature of the exhaust-gas stream which has been combined again can be set to between the temperature of the combustion of the hydrocarbon-containing fuels and the temperature of the cooled exhaust-gas part-stream by corresponding throttling of the two part-streams before they are brought together again. The exhaust-gas stream produced in this way is preferably used for the defined ageing of automotive exhaust catalysts. In this context, it is particularly advantageous that the change in the temperature of the exhaust-gas stream has no influence on its air/fuel ratio.

    摘要翻译: 来自具有可变温度的含烃燃料的燃烧的废气流可以通过将废气分成两个单独的部分流,冷却一部分流,然后再次组合两个部分流来产生。 再次组合的废气流的温度可以通过相应的两部分流的节流来设定在含烃燃料的燃烧温度和冷却的废气部分流的温度之间 在他们再次聚集在一起之前。 以这种方式生产的废气流优选用于汽车尾气催化剂的限定老化。 在这种情况下,排气温度的变化对其空气/燃料比没有影响是特别有利的。

    Process for regenerating a nitrogen oxides storage catalyst
    82.
    发明授权
    Process for regenerating a nitrogen oxides storage catalyst 有权
    再生氮氧化物储存催化剂的方法

    公开(公告)号:US07351677B2

    公开(公告)日:2008-04-01

    申请号:US10630303

    申请日:2003-07-29

    IPC分类号: B01J20/34

    摘要: The present invention provides a process and a device for regeneration of a nitrogen oxide storage catalyst in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy. The first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel-ratio from a lean to a rich value during a first regeneration period. The second regeneration strategy is applied when the exhaust gas temperature is below a threshold value and comprises switching the air/fuel-ratio back and forth between lean and rich air/fuel-ratios, forming a sequence of between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period.

    摘要翻译: 本发明提供一种用于在柴油发动机的排气系统中再生氮氧化物存储催化剂的方法和装置。 该方法包括第一和第二再生策略。 当废气温度高于阈值时,应用第一再生策略,并且包括在第一再生期间将空气/燃料比从贫值改变为浓值。 当废气温度低于阈值时,应用第二再生策略,并且包括在稀空燃比之间来回切换空燃比,形成富二脉冲之间的序列,介于 在第二再生期间的2和10个贫脉冲。

    Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine
    86.
    发明授权
    Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine 失效
    降低来自内燃机的废气的氮氧化物含量的方法

    公开(公告)号:US06238525B1

    公开(公告)日:2001-05-29

    申请号:US09299630

    申请日:1999-04-27

    IPC分类号: C01B2100

    摘要: A process for reducing the nitrogen oxides content of the exhaust gas from an internal combustion engine includes treating the exhaust gas in an electric gas discharge such that at least one of nitrogen dioxide or nitric acid are formed from nitrogen oxides in the exhaust gas; storing the nitrogen dioxides and/or the nitric acid in the form of nitrates on a nitrogen oxides storage material during phases when the engine operates with a greater than a stoichiometric air/fuel ratio (i.e., the storage phase); decomposing the nitrates to give nitrogen oxides during brief phases when the engine operates with a less than the stoichiometric air/fuel ratio (i.e., the desorption phase); and reducing the nitrogen oxides which are released from the storage material to nitrogen. The nitrogen oxides storage material may be located in an electric gas discharge zone, and the exhaust gas may be passed through the discharge and then over the storage material.

    摘要翻译: 用于降低来自内燃机的废气的氮氧化物含量的方法包括以排气中的氮氧化物形成至少一种二氧化氮或硝酸的电气放电来处理排气, 当发动机以大于化学计量的空气/燃料比(即储存阶段)运转时,在氮氧化物储存材料中将氮氧化物和/或硝酸以硝酸盐的形式储存在相中。 当发动机以小于化学计量的空气/燃料比(即,解吸阶段)运行时,在短时间内分解硝酸盐以产生氮氧化物; 并将从储存材料释放的氮氧化物还原成氮气。 氮氧化物存储材料可以位于电气放电区域中,并且排气可以通过排出物,然后通过存储材料。

    Method and apparatus for coating a carrier

    公开(公告)号:US10441949B2

    公开(公告)日:2019-10-15

    申请号:US10553359

    申请日:2004-04-16

    摘要: This invention relates to a method and a corresponding apparatus for coating open-pored bodies with at least one coating suspension. In particular, the coating suspension has solids and solutes in a liquid medium in a quantity in wet state which is to correspond to at least a required target quantity. The coating operation has a variation in the applied wet coating quantity from one body to the other. The method according to the invention is characterized by the steps of: coating the body with an actual quantity of the coating suspension, which is always larger than the required target quantity taking the variation of the coating operation into account, determining the difference between the actual quantity and the required target quantity, and reducing the difference between actual quantity and target quantity by removing still wet coating suspension.

    Method for monitoring the nitrogen oxide storage capacity of a nitrogen oxide storage catalyst used in the form of a primary catalytic converter
    90.
    发明授权
    Method for monitoring the nitrogen oxide storage capacity of a nitrogen oxide storage catalyst used in the form of a primary catalytic converter 有权
    监测以一级催化转化器形式使用的氮氧化物储存催化剂的氮氧化物储存能力的方法

    公开(公告)号:US08230674B2

    公开(公告)日:2012-07-31

    申请号:US11722135

    申请日:2005-12-17

    IPC分类号: F01N3/00

    摘要: Modern exhaust-gas purification systems in motor vehicles with a lean-burn engine include a starting catalyst fitted close to the engine and a main catalyst arranged in the underbody region, with both the starting catalyst and the main catalyst being formed by nitrogen oxide storage catalysts. The nitrogen oxide storage catalysts are in each case regenerated by the engine being briefly switched from lean-burn mode to rich-burn mode when the nitrogen oxide concentration in the exhaust gas downstream of the storage catalysts rises above a predetermined value.The starting catalyst is exposed to particularly high temperatures and is therefore prone to faster ageing of its nitrogen oxide storage capacity than the main catalyst. To check the nitrogen oxide storage capacity of the starting catalyst, a regeneration which is due for the catalyst system is selected in such a way in terms of its duration and the extent to which the exhaust gas is enriched that substantially only the starting catalyst is regenerated, whereas the main catalyst is not. In this arrangement, the criterion for terminating this partial regeneration is the breakthrough of rich exhaust gas through the starting catalyst. After the engine has been switched back to lean-burn mode, the time which elapses until the concentration of nitrogen oxides in the exhaust gas downstream of the catalyst requires regeneration again is measured. The measured time is a measure of the remaining nitrogen oxide storage capacity of the starting catalyst.

    摘要翻译: 具有稀燃燃烧发动机的机动车辆中的现代废气净化系统包括安装在发动机附近的起动催化剂和布置在底体区域中的主催化剂,起始催化剂和主催化剂由氮氧化物储存催化剂形成 。 当存储催化剂下游的废气中的氮氧化物浓度升高到预定值以上时,氮氧化物储存催化剂在每种情况下都可通过发动机从稀燃模式短暂切换为富燃模式。 起始催化剂暴露于特别高的温度,因此比主催化剂容易发生氮氧化物储存容量的老化。 为了检查起始催化剂的氮氧化物存储容量,选择催化剂体系所致的再生,就其持续时间和废气浓缩程度而言,基本上只有起始催化剂被再生 ,而主催化剂不是。 在这种布置中,终止这种部分再生的标准是通过起动催化剂的富排气的突破。 在发动机已经切换回稀燃模式之后,测量在催化剂下游的废气中的氮氧化物浓度再次需要再次之前经过的时间。 测量时间是起始催化剂的剩余氮氧化物储存容量的量度。