DEVICE FOR DETECTING RADIAL CRACKS IN A PARTICULATE FILTER
First Claim
1. An assembly having a device for detecting one or more radial cracks in a particulate filter of honeycomb structure, wherein a filtering part of the filter comprises a porous inorganic material, said particulate filter comprising a single monolithic element or a plurality of monolithic honeycomb elements bonded by a jointing cement, and optionally covered with a coating cement, the device comprising:
- an electrically conducting material arranged in the form of a strip or of a wire on at least one longitudinal part of the filter, said conducting material being secured to at least one of the monolithic element, the coating cement and the jointing cement, said conducting material having an electrical conductivity greater than an electrical conductivity of a material of the part of the filter to which the conducting material is secured, and a strength of the conducting material, at a temperature of between ambient temperature and 1200°
C., less than or equal to a strength of the material of the part of the filter to which the conducting material is secured,a comparator measuring the conductivity or an electrical resistance of the strip or wire of electrically conducting material.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to an assembly consisting of a device for detecting radial cracks in a particulate filter of the honeycomb type, of which the filtering part is made up of a porous inorganic material, said particulate filter comprising a single monolithic element or being obtained by combining a plurality of monolithic elements, the device being characterized in that it comprises an electrically conducting material arranged in the form of a strip or of a wire on at least one longitudinal part of the filter, secured to a monolithic element and/or to the coating cement or the jointing cement, and having an electrical conductivity greater than that of the material that makes up that part of the filter to which it is secured, and a strength less than or equal to that of the material that constitutes that part of the filter to which it is secured, and means of measuring the conductivity or the electrical resistance of the strip or wire of electrically conducting material.
-
Citations
16 Claims
-
1. An assembly having a device for detecting one or more radial cracks in a particulate filter of honeycomb structure, wherein a filtering part of the filter comprises a porous inorganic material, said particulate filter comprising a single monolithic element or a plurality of monolithic honeycomb elements bonded by a jointing cement, and optionally covered with a coating cement, the device comprising:
-
an electrically conducting material arranged in the form of a strip or of a wire on at least one longitudinal part of the filter, said conducting material being secured to at least one of the monolithic element, the coating cement and the jointing cement, said conducting material having an electrical conductivity greater than an electrical conductivity of a material of the part of the filter to which the conducting material is secured, and a strength of the conducting material, at a temperature of between ambient temperature and 1200°
C., less than or equal to a strength of the material of the part of the filter to which the conducting material is secured,a comparator measuring the conductivity or an electrical resistance of the strip or wire of electrically conducting material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification