-
公开(公告)号：US20170312691A1
公开(公告)日：2017-11-02
申请号：US15471124
申请日：2017-03-28
发明人： Ryosuke SATO , Kinichi IWACHIDO
CPC分类号： B01D53/945 , B01D53/9454 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/9022 , B01D2255/9025 , B01D2255/9032 , B01D2255/9035 , B01D2255/908 , B01J23/10 , B01J23/44 , B01J23/464 , B01J23/63 , B01J35/0006 , B01J35/023 , B01J37/0244 , F01N3/101 , F01N3/28 , Y02T10/22
摘要： An object is to provide an exhaust gas purification catalyst for an internal combustion engine that can achieve a higher exhaust gas purification performance and a higher engine output performance. A catalyst layer is disposed in an exhaust gas passage, formed on a surface of the substrate, and includes: a first catalyst layer exposed to an exhaust gas flow; and a second catalyst layer formed between the first catalyst layer and the substrate. A catalyst component supported on the first catalyst layer includes rhodium. A catalyst component supported on the second catalyst layer includes at least one of palladium and platinum. The first catalyst layer is formed such that a density of the rhodium supported thereon decreases in a step-like manner through a plurality of segment zones segmented along an exhaust gas flow direction, and the second catalyst layer is formed such that a density of the palladium or the platinum supported thereon decreases in a step-like manner through a plurality of segment zones segmented along the exhaust gas flow direction.
-
公开(公告)号：US20170312690A1
公开(公告)日：2017-11-02
申请号：US15471113
申请日：2017-03-28
发明人： Ryosuke SATO , Kinichi IWACHIDO
CPC分类号： B01D53/945 , B01D53/944 , B01D53/9445 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/407 , B01D2255/9022 , B01D2255/9032 , B01D2255/908 , B01D2258/012 , B01J23/002 , B01J23/42 , B01J23/44 , B01J23/464 , B01J23/63 , B01J35/0006 , B01J35/04 , B01J37/0244 , F01N3/101 , F01N2510/0684 , Y02T10/22
摘要： An object of at least one embodiment of the present invention is to suppress poisoning due to phosphorus derived from engine oil, and effectively purify NOx discharged from the time of engine start up to a high load condition. In an exhaust gas purification catalyst for an internal combustion engine, a catalyst layer includes: a first catalyst layer exposed to an exhaust gas flow; and a second catalyst layer formed between the first catalyst layer and the substrate. A second catalyst upstream layer formed on an upstream side of the second catalyst layer with respect to the exhaust gas flow and a first catalyst downstream layer formed on a downstream side of the first catalyst layer with respect to the exhaust gas flow include at least one of palladium and platinum, as well as an oxygen storage material as the catalyst component. An amount of the oxygen storage material in the first catalyst downstream layer is larger than an amount of the oxygen storage material in the second catalyst upstream layer.
-
公开(公告)号：US20200018216A1
公开(公告)日：2020-01-16
申请号：US16468209
申请日：2017-09-14
发明人： Ryosuke SATO , Kinichi IWACHIDO
摘要： An exhaust gas purification system for an engine includes an exhaust passage extending from the combustion chambers of the engine, and an exhaust purifying unit disposed in the exhaust passage and configured to purify exhaust gas in the exhaust passage. The exhaust purifying unit includes a carrier disposed in the exhaust passage, a first purifier having at least a function of oxidizing components in the exhaust gas. The first purifier covers, as an underlayer, an outer surface of the carrier, and a second purifier having a function of purifying the exhaust gas by reducing, using occluded ammonia, the components in the exhaust gas that have been oxidized in the first purifier. The second purifier includes a superposed portion covering, as an upper layer, an outer surface of the first purifier.
-
-
搜索结果
3 条记录 (耗时 0.013 秒)
