Process and an apparatus for determining pressure losses of exhaust gas purification honeycomb structural bodies, by presumption, at respective points of time when honeycomb structural bodies are to be regenerated
First Claim
1. A process for determining a pressure loss of exhaust gas purification honeycomb structural bodies to be inspected, at a point in time when the honeycomb structural body is to be regenerated, said honeycomb structural body having a number of through holes alternatively sealed at opposite end faces, comprising the steps of:
- (1) flowing particles through each of several test exhaust gas purification honeycomb structural bodies of a given type in an axial direction of the through holes thereof;
(2) measuring, for each Of the several test exhaust gas purification honeycomb structural bodies, (i) a pressure loss therethrough at a first point in time when the test honeycomb structural body traps a given amount of the particles and (ii) the pressure loss through the test honeycomb structural body at a second point in time when the test honeycomb structural body traps the particles in Such an amount suitable for regeneration;
(3) determining a relationship between the measured pressure losses of the several test exhaust gas purification honeycomb structural bodies at said first point in time and the measured pressure losses of the several test honeycomb structural bodies at said second point in time;
(4) measuring the pressure loss of a honeycomb structural body to be inspected, at a point in time when the honeycomb structural body to be inspected traps said given amount of the particles; and
(5) based on the thus measured pressure loss, presuming the pressure loss of said honeycomb structural body to be inspected at a point in time suitable for regeneration thereof with reference to said relationship.
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Accused Products
Abstract
A process is disclosed for determining a pressure loss of exhaust gas purification honeycomb structural bodies to be inspected, at a point of time when the honeycomb structural body is to be regenerated, said honeycomb structural body having a number of through holes alternatively sealed at opposite end faces, comprising the steps of: (1) flowing particles through each of exhaust gas purification honeycomb structural bodies of a given type in an axial direction of the through holes thereof, (2) determining a relationship between the pressure loss of the exhaust gas purification honeycomb structural body at a point of time when the honeycomb structural body catches a given amount of the particles and the pressure loss of the honeycomb structural body at a point of time when the honeycomb structural body catches the particles in such an amount suitable for the regeneration, (3) then measuring the pressure loss of a honeycomb structural body to be inspected, at a point of time when the honeycomb structural body to be inspected catches said given amount of the particles, and (4) based on the thus measured pressure loss, presuming the pressure loss at a point of time suitable for the regeneration thereof with reference to the relationship determined above. An apparatus is also disclosed to effect the above process.
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Citations
3 Claims
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1. A process for determining a pressure loss of exhaust gas purification honeycomb structural bodies to be inspected, at a point in time when the honeycomb structural body is to be regenerated, said honeycomb structural body having a number of through holes alternatively sealed at opposite end faces, comprising the steps of:
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(1) flowing particles through each of several test exhaust gas purification honeycomb structural bodies of a given type in an axial direction of the through holes thereof; (2) measuring, for each Of the several test exhaust gas purification honeycomb structural bodies, (i) a pressure loss therethrough at a first point in time when the test honeycomb structural body traps a given amount of the particles and (ii) the pressure loss through the test honeycomb structural body at a second point in time when the test honeycomb structural body traps the particles in Such an amount suitable for regeneration; (3) determining a relationship between the measured pressure losses of the several test exhaust gas purification honeycomb structural bodies at said first point in time and the measured pressure losses of the several test honeycomb structural bodies at said second point in time; (4) measuring the pressure loss of a honeycomb structural body to be inspected, at a point in time when the honeycomb structural body to be inspected traps said given amount of the particles; and (5) based on the thus measured pressure loss, presuming the pressure loss of said honeycomb structural body to be inspected at a point in time suitable for regeneration thereof with reference to said relationship. - View Dependent Claims (2)
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3. An apparatus for determining, by presumption, pressure loss of exhaust gas purification honeycomb structural bodies having a number of through holes alternatively sealed at opposite end faces, said apparatus comprising:
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a support table for gas-tightly supporting a periphery of an end portion of an exhaust gas purification honeycomb structural body having a number of through holes alternatively sealed at opposite end faces; a particle-containing gas generator connected to said support table through a flow path and adapted for generating a particle-containing gas; a flow path-switching valve for opening or closing said flow path relative to said honeycomb structural body by switching; an inspection time-adjusting timer for allowing a given amount of particles to be heaped on said honeycomb structural body by opening and closing the flow path with said flow path-switching valve; and a differential pressure gauge for measuring a pressure difference between an inlet side and an outlet side of said exhaust gas purification honeycomb structural body set on said supporting table.
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Specification