Gm Global Technolgoy Operations, Inc.

Dana Michael Serrels

Stephen Joe Myers

Michael Ralph Foster

David K Chen

Gerald Leroy Vaneman

Jesse Allan Heather

John A Horton

Roger Eugene Buck

Brian M Bibb

Walter Jenkins

A housing for a catalytic converter for an automotive vehicle engine exhaust system is formed of two deep drawn shells having open inner ends welded together in generally abutting relation. Modified conical outer ends taper to reduced size openings for connection to associated exhaust system pipes. To permit deep drawing, the outer ends as seen in longitudinal cross section are formed with curved surfaces including an intermediate curvature replacing a conventional conical shape and defined by radii of a value between 0.5 and 0.8 times the inner diameter of the tubular body portions of the respective shells which enclose a catalytic element. Connecting radii are preferably not greater than 0.1 times the tubular portion inner diameter. Various alternative forms of welded inner end joints are disclosed.

Catalytic converter housing with deep drawn shells

A method of manufacturing an oval shaped catalytic converter that reduces the amount of material and number of parts that are required for permitting the catalytic converter to treat the exhaust gases of an internal combustion engine and also improves the structural durability of the converter for high temperature applications by maintaining a higher mat density along the minor axis of the converter housing.

Method of making a catalytic converter

An apparatus for sensing exhaust gas comprising: first and second tubular passages; a solid plug through which the first and second tubular passages pass and to which the tubular passages are sealingly engaged; a sampling chamber mounted to and in flow contact with the first and second tubular passages, wherein the first tubular passage provides gas flow into the sampling chamber and the second tubular passage takes gas flow out of the sampling chamber; and a flow passage having a tubular wall with an opening therein to which the solid plug is sealingly engaged, wherein the first and second tubular passages extend from inside the flow passage, through the plug, to the sampling chamber mounted outside of the flow passage.

Apparatus for sensing exhaust gas

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Davison, MI, United States of America

Dana Michael Serrels