The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1984
Filed:
Dec. 08, 1982
Kenneth B Bly, Pontiac, MI (US);
Terrance L Stark, Washington, MI (US);
Otto A Ludecke, Rochester, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A particulate trap for use in the exhaust system of a diesel engine to effect removal of particulates from the exhaust gases discharged from the engine, has a trap housing with an exhaust inlet at one end and an exhaust outlet at its opposite end with at least one ceramic monolith wall flow particulate filter having an inlet end and an outlet end positioned in the trap housing by a tubular support member having a mat of refractory material sandwiched between it and a portion of said particulate filter next adjacent to the outlet end thereof in a manner to prevent bypass flow from said exhaust inlet around said particulate to the exhaust outlet, at least 50% of the exterior surface of the particulate filter next adjacent to its inlet end being in spaced apart relationship to the trap housing so as to define a passage in flow communication with the incoming exhaust gases whereby these gases will heat the exterior of the filter next adjacent to the inlet end thereof so as to effect a reduction of the thermal stress on the particulate filter during engine operation. This support arrangement also reduces radial and axial stress on this exposed end of the filter.