摘要:
The invention relates to a filtration structure (11) consisting of: first and second filtration elements (15A, 15B) which comprise respectively a first face and a second face (24A, 24B), said faces being disposed opposite one another; and a connecting joint (17) which extends between the faces (24A, 24B) and connects same. The aforementioned joint (17) comprises a binder (41) and reinforcing means (43) which are embedded therein. The reinforcing means (43) comprise an open-work reinforcing member having an autonomous coherence and comprising an essentially-flat active part (45). The invention is suitable for particle filters for the exhaust gases from an internal combustion engine.
摘要:
A device for aligning and/or assembling filtering elements, in particular of particulate filter, an installation for assembling a filter from filtering elements incorporating the device, and a method for aligning and/or assembling monolithic filtering elements, in particular for making a particulate filter. The device includes a back plate whereon are set the filtering elements, the back plate being for example fixed on a base plate, and walls laterally foldable upwards by a folding mechanism, such that the filtering elements are mutually maintained tightly when the walls are in an upper position.
摘要:
A nondestructive method for detecting internal defects of a filter, for example a catalytic filter, and a device for implementing the method. The method may be used in particular for treating a gas laden with soot particulates. The filter includes a honeycomb filter element or a plurality of honeycomb filter elements. In the method the presence or absence of the defects is determined by measuring a propagation of a gas stream such as air through the filter element or elements.
摘要:
The inventive filter unit for filtering particles contained in exhaust gas of an internal combusting engine comprises sets of imbricated input channels (10, 11) and adjacent output channels (12, 13) which are fluidly communicating by means of the lateral walls thereof. Said lateral walls are cross-sectionally provided with a corrugation which is determined in such a way that the total volume of the input channels (10, 11) is increased with respect to that of the output channels (12, 13), whereby the total volume (Ve) of the input channels (10, 11) being greater than that (Vs) of the output channels (12, 13).
摘要:
The invention relates to an assembled structure that can be used, after deposition of a catalyst, for filtering a gas loaded with soot particles and pollutants in the gas phase in which the cement used as a coating cement and/or as a joint cement comprises, at least at the surface, a hydrophobic or oleophobic material.The invention also relates to the assembled catalytic filter obtained after impregnating with a catalytic solution of said structure and also to the process for manufacturing the filter from said structure.
摘要:
A filter block for filtering particles contained in the exhaust gas of an internal combustion engine includes a plurality of channels for the circulation of the gas, a channel defined by a wall provided with a filtering zone and which opens out towards the outside via an opening, a group of channels including at least two channels with different respective F/P ratios between surface F of the filtering zone and surface P of the wall. One channel of the group of channels includes an opening whose surface O is larger than the surface F of the filtering zone of the channel.
摘要:
Said structure comprises first and second filtering elements (15A, 15B) respectively comprising a first and second lateral surface (24A, 24B) disposed opposite each other. A joint (17) linking said surfaces (24A, 24B) extends between the surfaces (24A, 24B). The first lateral surface (24A) comprises, in the upstream part (36A), a first region (35C) of low or zero adherence with the joint (17), said region being defined longitudinally upstream by an upstream region (33A) of high adherence with said joint (17). The upstream region (33A) of high adherence is longitudinally defined upstream by a second region (35A) of low or zero adherence with the joint (17). Application: particle filters for the exhaust gases of an engine.
摘要:
Structure for filtering particulate-laden gases, of the honeycomb type, which is characterized in that the material based on silicon carbide constituting its walls has an open porosity of between 30 and 53%, a median pore diameter between 9 and 20 μm, an average number of open pores on the surface of the walls, the equivalent opening area of which is between 20 and 310 μm2, is greater than 300 per mm2 of wall and a ratio of the total opening area of said open pores to said surface of the walls between 15 and 30%.
摘要翻译:用于过滤蜂窝状颗粒的气体的结构,其特征在于,构成其壁的基于碳化硅的材料的开孔率为30%至53%,中值孔径为9至20μm,平均孔径为9至20μm, 壁的表面上的开孔数目为20-30m 2 / m 2,每平方毫米壁大于300个,所述开孔的总开口面积与所述壁面的总面积之比 在15%到30%之间。
摘要:
This structure (11) comprises first and second filtering elements (15A, 15B) extending essentially parallel to a longitudinal axis (X-X′) of the structure (11) between an admission region (21) of the gases into the structure (11) and an evacuation region (23) of the gases from the structure, and comprises a seal (17) for joining these elements (15A, 15B). The seal (17) comprises at least one downstream pat (43) which has a thermal mass per unit length greater than the thermal mass per unit length of an upstream part (41) of the seal (17). The invention is for use in particulate filters for the exhaust gases of a motor vehicle diesel engine.
摘要:
The invention relates to a method of obtaining a homogeneous filtering structure for a catalytic application, which can be used as a particulate filter in an internal combustion engine exhaust line, said structure comprising a plurality of honeycomb filter elements in which a homogeneity criterion characteristic of the constituent support material of said elements, in the absence of a catalytic coating, is determined in a prior step, and then the elements making up the structure are selected by means of this homogeneity criterion so as to obtain a structure suitable for homogeneous deposition, within an element and from one element to another, of a catalyst for treating the pollutants in gas phase.The invention also relates to the homogeneous filtration structure obtained by said method.