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US 2004/0000186 A1Published application
Method for testing the integrity of dpfs
AssigneeCorning Incorporated
InventorsRalph H. Hagg, Jeffrey G. Payne, Leon R. Zoeller III
Life of this patent
Estimating the term…
Abstract
A method for inspecting the integrity of diesel exhaust filter by introducing air under pressure through one end of the structure and detecting the presence of air flow at an opposing end surface. The diesel exhaust filter is tested green.
Claims14
A method for detecting integrity leakage defects in a filter for trapping and combusting diesel exhaust particulates, comprising:
- a. providing a green plugged honeycomb structure having a plurality of parallel cell channels traversing the structure from an inlet end to an outlet end thereof;
- b. passing air under pressure through the inlet end of the honeycomb structure;
- and,
- c. detecting airflow at the outlet end of the honeycomb structure, whereby the presence of the air at the outlet end indicates integrity leakage defects in the ceramic filter.
1 more element
An assembly for testing the integrity of diesel exhaust filters, comprising:
- an enclosure having an aperture;
- a green plugged filter removably mounted in the aperture of the enclosure;
- an air blower in communication with the enclosure;
- and,
- means for detecting air leakage in the green plugged filter.
2 more elements
Dependencies are inferred from the claim text.