Abstract: A computer-implemented method for measuring the three-dimensional geometry of a mineral glass-based glazing during or just after a temperature shaping operation. The method implements digital processing and calculations, based on the principles of stereocorrelation, of digital images of a random light pattern projected onto the surface of a transparent glazing. It makes it possible in particular to determine the shape or the three-dimensional geometry of a transparent glazing, the surface of which not be totally opacified and/or which radiates under the effect of temperature.

Abstract: 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.

Abstract: One subject of the invention is a process for checking the robustness of a particulate filter intended to be used in the exhaust line of a diesel engine, comprising the steps consisting in, having first determined the soot mass limit of the filter, loading a new filter with a level of soot at least equal to two times and at most equal to three times the soot mass limit, then making the filter undergo a severe regeneration then, in any order, determining the filtration efficiency of the filter, measuring its pressure drop and comparing it to the pressure drop of the new filter, measuring its level of cracking, and finally checking its integrity after a mechanical stress. Another subject of the invention is a method for diagnosing the robustness of a filter.

Abstract: One subject of the invention is a process for checking the robustness of a particulate filter intended to be used in the exhaust line of a diesel engine, comprising the steps consisting in, having first determined the soot mass limit of said filter, loading a new filter with a level of soot at least equal to two times and at most equal to three times said soot mass limit, then making said filter undergo a severe regeneration then, in any order, determining the filtration efficiency of said filter, measuring its pressure drop and comparing it to the pressure drop of the new filter, measuring its level of cracking, and finally checking its integrity after a mechanical stress. Another subject of the invention is a method for diagnosing the robustness of a filter.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a catalytic filter for the treatment of a gas laden with soot and pollutant particles in a gas phase, comprising a plurality of monolithic honeycomb blocks connected together by a jointing cement, the thermal conductivity of which is greater than 0.3 W/m.K, said filter being characterized in that at least the monolithic blocks placed in the central part of the filter, and preferably all of the monolithic blocks, have, along a radial direction, a peripheral portion whose total filtration area is greater than the total filtration area of the central portion of said blocks.

Abstract: A filtering body (3), in particular for a motor vehicle internal combustion engine exhaust gas particulate filter (1), includes a plurality of filtering units (11a–11i) assembled by at least a joint (12) interposed between the filtering units (11a–11i) and configured so as to counter the passage of exhaust gases between the filtering units (11a–11i). The filtering body is characterized in that the joint (12) comprises a plurality of joint portions (12a–12e) locally adapted to optimize the attenuation of thermomechanical stresses liable to be generated in the filtering body (3).