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    • 2. 发明授权
    • Exhaust gas filter for diesel engines
    • 柴油发动机废气过滤器
    • US4704863A
    • 1987-11-10
    • US810766
    • 1985-12-19
    • Joerg AbthoffHans-Dieter SchusterGunter LooseBernhard Jokl
    • Joerg AbthoffHans-Dieter SchusterGunter LooseBernhard Jokl
    • F01N3/02B01D46/24F01N3/022
    • F01N3/0222B01D46/2407F01N2240/20F01N2330/06Y02T10/20Y10S55/30
    • An exhaust gas filter for Diesel engines that consists of a monolithic filter block made of a porous ceramic material having a plurality of ducts extending in the flow direction of the exhaust gases, said ducts alternately being closed by plugs in order to force the passage of gas through the duct walls into adjacent ducts. In the case of this exhaust gas filter, the filter block is divided into zones having a decreasing porosity in the flow direction of the gases, and the plugs which force the passage of the gas through the duct walls are each arranged in the area of the zone border. Filters are preferred that have two to four zones of decreasing porosity. The exhaust gas filters are manufactured in that a filter blank that has the largest desired porosity is immersed in a solution or suspension of a porosity-reducing agent up to the desired zone border and is subsequently dried and is possibly burnt. Preferred agents for reducing the porosity are water glass solutions or cordierite suspensions.
    • 一种用于柴油发动机的废气过滤器,其由具有沿废气流动方向延伸的多个管道的多孔陶瓷材料制成的单块过滤器块组成,所述管道交替地被塞子封闭,以迫使气体通过 通过管道壁进入相邻的管道。 在这种废气过滤器的情况下,过滤块被分成在气体的流动方向上具有降低的孔隙率的区域,并且迫使气体通过管道壁的塞子分别布置在 区域边界。 过滤器是优选的,具有两到四个孔隙率降低的区域。 废气过滤器的制造方法是将具有最大期望孔隙率的过滤器坯料浸渍在孔隙减少剂的溶液或悬浮液中直到所需的区域边界,并随后被干燥并且可能被燃烧。 用于降低孔隙率的优选试剂是水玻璃溶液或堇青石悬浮液。