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:
Mar. 10, 1992
Filed:
Jul. 16, 1990
Applicant:
Inventors:
Herbert Ampferer, Sachsenheim, DE;
Klaus Schneider, Tiefenbronn-Muhlhausen, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
F01N / ; F01N / ;
U.S. Cl.
CPC ...
60290 ; 60301 ; 422171 ; 422180 ;
Abstract
A metal support catalyst is inserted into the exhaust pipe of a reciprocating piston engine. The catalyst comprises two monoliths spaced away from one another and surrounded by jacket tubes which are centered coaxially with respect to one another with a sliding fit in beads and crimpings of the outer jacket. At an air feeding point between the beads of the outer jacket, air is introduced between the two monoliths in the lower rotational speed range of the engine in order to achieve an afterreaction of the exhaust gases.