摘要:
Cross-sectional geometries of filter elements for soot particle filters are described, allowing uniform loading of the filter element with soot. Starting with hexagonal cell shapes, other polygonal shapes are arranged around them. All the cross-sectional geometries have in common the fact that the cross-sectional area of all inlet channels is larger than the cross-sectional area of all outlet channels.
摘要:
A filter element for a soot particle filter includes a blank which is designed, during extrusion, specifically not to be round, so that, in response to subsequent heat treatment, the different shrinkage measurements in the radial direction become equalized, and a filter element that has a circular cross section is produced.
摘要:
The extrusion-molding device of the invention is for producing a green honeycomb molded body with a cell structure, and the device includes a housing, a screw, a die with slits, a resistance tube and a fragmenting board having through-passages through which a raw material composition passes from the upstream end side to the downstream end side. The through-passages of the fragmenting board have upstream channels composed of a plurality of flow passages extending downstream from the upstream end side, and downstream channels extending up to the downstream end side and having flow passage cross-sectional shapes different from those of the upstream channels.
摘要:
Obtaining computer-tomography images of a first section at a distance Z1 from one end surface 112d of a honeycomb structure 100 and a second section at a distance Z2 larger than the distance Z1 from the end surface 112d of the honeycomb structure, determining the existence/nonexistence of a plugging portion 114 in at least one of the plurality of passages based on the computer-tomography image of the first section, determining the existence/nonexistence of the plugging portion in the at least one passage based on the computer-tomography image of the second section, and determining the length of the plugging portion based on the result of determination of the existence/nonexistence of the plugging portion based on the computer-tomography image of the first section and the result of determination of the existence/nonexistence of the plugging portion based on the computer-tomography image of the second section.
摘要:
A method for manufacturing a honeycomb-structured object having a plurality of through holes having ends thereof plugged, including a step of pressing a plugging material against one end surface of a honeycomb-structured object 70 having a plurality of through holes 70a by a plate 20 to fill one ends of the through holes 70a with the plugging material; and a step of protruding a part of a portion in the plate 20 opposed to the one end surface of the honeycomb-structured object 70 toward the one end surface to pull the other part of the portion in the plate 20 opposed to the one end surface of the honeycomb-structured object 70 and the one end surface away from each other.
摘要:
A filter device, in particular for an exhaust-gas system of an internal combustion engine, includes a filter structure having at least one filter wall. Filtered-out particles are deposited on its upstream surface. It is provided that the upstream-lying surface of the filter wall is at least regionally uneven.