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    • 8. 发明专利
    • Particulate filter with catalyst
    • 带催化剂的颗粒过滤器
    • JP2009287528A
    • 2009-12-10
    • JP2008143539
    • 2008-05-30
    • Mazda Motor Corpマツダ株式会社
    • HARADA KOICHIROYAMADA KEIJISUMITA HIROSUKE
    • F01N3/02B01D39/14B01D46/42B01D53/94B01J23/89F01N3/10F01N3/28
    • PROBLEM TO BE SOLVED: To improve particulate combustibility and exhaust emission control performance of a particulate filter with a catalyst.
      SOLUTION: In this particulate filter with the catalyst, a catalyst layer 7 having Ce-containing oxide particles 23 having oxygen storage/release capacity, aluminum particles 26, and catalyst metals 25 are formed in the exhaust emission passage wall portion of a filter body 5. Iron-oxide particles 24 having particle diameter of 300 nm or less and brought into contact with the Ce-containing oxide particles 23 and aluminum particles 26 are dispersively contained in the catalyst layer 25. In electron microscope observation, an area ratio occupied by the iron-oxide particles 24 having particle diameter of 300 nm or less in the total area of the iron-oxide particles is 30% or more.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提高具有催化剂的颗粒过滤器的颗粒燃烧性和废气排放控制性能。 解决方案:在具有催化剂的该颗粒过滤器中,在具有氧气储存/释放能力的含Ce氧化物颗粒23的催化剂层7,铝颗粒26和催化剂金属25上形成有 过滤体5.粒径为300nm以下并与含Ce氧化物粒子23和铝粒子26接触的氧化铁粒子24分散地包含在催化剂层25中。在电子显微镜观察中,面积比 由铁氧化物颗粒的总面积中的粒径为300nm以下的氧化铁颗粒24占据30%以上。 版权所有(C)2010,JPO&INPIT
    • 9. 发明专利
    • Particulate filter
    • 颗粒过滤器
    • JP2009243274A
    • 2009-10-22
    • JP2008087196
    • 2008-03-28
    • Mazda Motor Corpマツダ株式会社
    • YAMADA KEIJIHARADA KOICHIROSUZUKI KENJIOKAMOTO KENJITAKAMI AKIHIDE
    • F01N3/02B01D39/20B01D46/00
    • B01D46/247B01D46/2451B01D46/2455B01D46/2459B01D2046/2481B01D2046/2485B01D2046/2496B01D2279/30F01N3/0222Y02T10/20Y10S55/30Y10T428/24149
    • PROBLEM TO BE SOLVED: To provide a particulate filter for suppressing the condition of excessively raising the temperature of the particulate filter at its center side during regenerating treatment of the particulate filter while holding down pressure loss. SOLUTION: The particulate filter 10 includes a filter body 8 formed with a plurality of filter segments F1, F2 which consist of a plurality of flow-in side cells having sealed downstream side end faces in the flowing direction of exhaust gas and a plurality of flow-out side cells having sealed upstream side end faces in the flowing direction of exhaust gas, and which are bonded to each other via a bonding material 7. The filter segment located on the center side of the particulate filter is formed so that the opening area of each of the flow-in side cells is almost equal to the opening area of each of the flow-out side cells. At least one filter segment located on the outer periphery side of the particulate filter is formed so that the opening area of each of the flow-in side cells is larger than the opening area of each of the flow-out side cells. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种微粒过滤器,用于在抑制压力损失的同时,抑制在微粒过滤器的再生处理期间过滤微粒过滤器的中心侧的温度过度的状况。 解决方案:颗粒过滤器10包括形成有多个过滤器段F1,F2的过滤器主体8,该过滤器段F1,F2由排气的流动方向上具有密封的下游侧端面的多个流入侧室组成, 多个流出侧单元在排气的流动方向上具有密封的上游侧端面,并且经由接合材料7彼此接合。位于微粒过滤器的中心侧的过滤器段形成为使得 每个流入侧单元的开口面积几乎等于每个流出侧单元的开口面积。 形成位于微粒过滤器的外周侧的至少一个过滤器段,使得每个流入侧单元的开口面积大于每个流出侧单元的开口面积。 版权所有(C)2010,JPO&INPIT
    • 10. 发明专利
    • Particulate filter
    • 颗粒过滤器
    • JP2009112951A
    • 2009-05-28
    • JP2007289298
    • 2007-11-07
    • Mazda Motor Corpマツダ株式会社
    • OKAMOTO KENJIYAMADA KEIJIHARADA KOICHIROSUZUKI KENJITAKAMI AKIHIDE
    • B01J27/224B01D53/94F01N3/02F01N3/10
    • PROBLEM TO BE SOLVED: To provide a particulate filter which has high heat resistance and excellent PM combustion performance, for example, low initiation temperature when used for burning PM.
      SOLUTION: The particulate filter has an oxidation catalyst layer 8, which promotes the combustion of captured particulates, on the surface of a porous partition wall 5. The oxidation catalyst layer 8 comprises a Ce-based compound oxide particle (A)21 having oxygen storage/release capacity and a Zr-based compound oxide particle (B)23 having oxygen ion conductivity and a catalytic noble metal 25-deposited, and heat-resistant and high-specific surface area particle (C)22 as a principal component. The weighted average particle diameter of each of the Ce-based compound oxide particle, the Zr-based compound oxide particle and the heat-resistant and high-specific surface area particle is ≤1 μm and the weighted average particle diameter of the heat-resistant and high-specific surface area particle (C)22 is positioned between that of the Ce-based compound oxide particle (A)21 and that of the Zr-based compound oxide particle (B)23.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供具有高耐热性和优异的PM燃烧性能的微粒过滤器,例如当用于燃烧PM时的起始温度低。 解决方案:颗粒过滤器在多孔分隔壁5的表面上具有促进捕获的颗粒的燃烧的氧化催化剂层8.氧化催化剂层8包含Ce基复合氧化物颗粒(A)21 具有氧气储存/释放能力和具有氧离子传导性的Zr基复合氧化物颗粒(B)23和沉积的催化贵金属25,耐热和高比表面积颗粒(C)22作为主要成分 。 Ce类复合氧化物粒子,Zr系复合氧化物粒子,耐热高比重面积粒子的加权平均粒径为≤1μm,耐热性加权平均粒径 高比表面积粒子(C)22位于Ce类复合氧化物粒子(A)21和Zr系复合氧化物粒子(B)23的高比表面积粒子(C)22之间。 版权所有(C)2009,JPO&INPIT