Exhaust gas conduit of an internal combustion engine with a starting catalyser arranged near the engine

U.S. Patent Number: 5345762

Abstract: The invention relates to an exhaust gas conduit of an internal combustion engine with a starting catalyser which is arranged near the engine and in whose casing a central passage surrounded by a catalyser body is provided. The central passage is controllable by means of an exhaust gas butterfly valve in such a way that the exhaust gas flows through the catalyser body when the butterfly valve is closed and is led through the central passage when the butterfly valve is open. In order to prevent overheating of the starting catalyser after the main catalyser starts, a pipe section of the exhaust gas conduit is provided which starts from an inlet flow end casing section, protrudes into the central passage so as to form an annular passage and ends at an upstream distance from the exhaust gas butterfly valve.

Inventors: Lutze; Roland (Altbach, DE)

Assignee: Mercedes-Benz AG (Stuttgart, DE)

Application Number: 08/042,016

Issued: 1994-09-13

Expired: 2006-09-13

Classes: 60/288 ; 422/177; 422/180; 60/284

Field of search: 60/288,284 422/177,180

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.