摘要:
The present invention provides a method of removing harmful gases from an automobile exhaust. The method of the invention comprises contacting a thermally stable NOx trap composition with a first exhaust gas mixture at a temperature of at least 200° C. The first exhaust gas mixture includes exhaust gases from an internal combustion engine operating in a fuel-lean condition. After, NOx has been absorbed onto the NOx absorber material, the NOx trap composition is then contacted with a second exhaust gas composition. In this step, the second exhaust gas mixture includes exhaust gases from an internal combustion engine operating in a fuel-rich condition. The present invention also provides the NOx trap composition used in the method. The NOx trap of the invention includes a precious metal, a NOx absorber material, an oxide that inhibits the decrease in NOx storing ability of the NOx trap composition, and a support material.
摘要翻译:本发明提供一种从汽车尾气除去有害气体的方法。 本发明的方法包括在至少200℃的温度下使热稳定的NO x X捕集组合物与第一废气混合物接触。第一废气混合物包括来自内燃机 在燃料贫乏状态下运行。 之后,NO x x吸收剂被吸收到NO x吸收剂材料上,然后将NO XSM捕集组合物与第二废气组合物接触。 在该步骤中,第二废气混合物包括来自富燃料条件的内燃机的废气。 本发明还提供了该方法中使用的NO x陷阱组合物。 本发明的NO X阱捕集器包括贵金属,NO x x吸收材料,抑制NO x x存储能力降低的氧化物 的防水组合物,以及载体材料。
摘要:
A lean NOx trap composition. The lean NOx trap composition utilizes ruthenium in place of higher cost metals such as platinum. The lean NOx trap composition provides high NOx storage efficiency and high NOx conversion efficiency when incorporated in a lean NOx trap. A method of removing harmful gases using the lean NOx trap composition is also described.
摘要翻译:一个稀有的>陷组合物。 贫>陷阱组合物利用钌代替较高成本的金属如铂。 当掺入稀硝酸盐时,稀的捕集组合物提供了高的NO x x N存储效率和高的NO x x转换效率, / SUB>陷阱。 还描述了使用贫NO X陷阱组合物去除有害气体的方法。
摘要:
A lean NOx trap composition. The lean NOx trap composition utilizes ruthenium in place of higher cost metals such as platinum. The lean NOx trap composition provides high NOx storage efficiency and high NOx conversion efficiency when incorporated in a lean NOx trap. A method of removing harmful gases using the lean NOx trap composition is also described.
摘要:
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
摘要:
A mechanical apparatus including a combustion engine, a conduit for transporting an exhaust stream away from the engine, a first catalytic NOx storage and conversion region disposed along the conduit, and a second catalytic NOx storage and conversion region disposed along the conduit at a location downstream from the first catalytic NOx storage and conversion region is disclosed. Each of the first catalytic NOx storage and conversion region and the second catalytic NOx storage and conversion region includes at least one catalytic metal configured to convert NOx to NO2 when the engine is supplied a lean air/fuel mixture, and at least one NOx adsorbing compound configured to adsorb NO2 for storage when the engine is supplied a lean air/fuel mixture, and wherein the one of the first and the second catalytic NOx storage and conversion regions has a lower concentration of catalytic metal than the other of the first and second catalytic NOx storage and conversion regions.
摘要翻译:一种机械设备,包括内燃机,用于将排气流输送离开发动机的导管,沿导管设置的第一催化剂NO x X存储和转化区域,以及第二催化剂NO x 公开了沿着导管设置在第一催化剂NO x存储和转换区域下游的位置的 SUB>存储和转换区域。 第一催化NO x X存储和转化区域和第二催化剂NO x存储和转化区域中的每一个包括至少一种催化金属,其被配置成将NO x x 在发动机供给稀薄空气/燃料混合物时,至少一个NO 2吸附化合物配置成吸附NO 2 / SUB>用于在发动机供应稀薄空气/燃料混合物时存储,并且其中第一和第二催化剂NO x存储和转化区域中的一个具有比其他催化剂更低的催化金属浓度 的第一和第二催化剂NO x存储和转化区域。
摘要:
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
摘要:
In an apparatus having an internal combustion engine, a fuel tank, and an extractor disposed fluidically between the fuel tank and the engine, a method of operating the apparatus is disclosed, wherein the method comprises adding a volume of a mixed fuel into the extractor from the fuel tank, wherein the mixed fuel contains at least one substantially nonpolar fuel component and at least one polar fuel component, adding a volume of a polar solvent to the extractor, extracting at least a portion of the polar fuel from the mixed fuel into the polar solvent, thereby forming a first fuel mixture with an enriched concentration of the polar fuel and a second fuel mixture with an enriched concentration of the substantially nonpolar fuel, and providing the first fuel mixture and the second fuel mixture to the engine in a ratio selected based upon engine operating condition.
摘要:
A method of desulfating a catalytic NOx storage and conversion device is disclosed, wherein the method includes determining an amount of sulfur stored in the catalytic NOx storage and conversion device; determining an interval for exposing the catalytic NOx storage and conversion device to a rich exhaust stream based upon the determined amount of sulfur stored, wherein the interval is longer for lower amounts of sulfur stored and shorter for higher amounts of sulfur stored; and exposing the catalytic NOx storage and conversion device to the rich exhaust stream for the determined interval.
摘要翻译:公开了一种脱硫催化NO x X存储和转化装置的方法,其中所述方法包括确定储存在催化NO x存储和转换装置中的硫的量; 基于所确定的硫的量确定用于将催化NO x X存储和转化装置暴露于富排气流的间隔,其中对于较低量的硫储存而言间隔更长,较高量的较短量 的硫储存; 并将催化NO x X存储和转换装置暴露于浓排气流达所确定的间隔。
摘要:
Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
摘要:
A method of operating a vehicle system including an internal combustion engine is disclosed, the method comprises separating a second fuel from a first fuel, the second fuel having a greater concentration of at least one component than the first fuel; combusting at least the first fuel at least during a first engine load; and combusting at least the second fuel at least during a second engine load higher than the first engine load.