Close-coupled catalytic converter

Abstract

A close-coupled catalytic converter according to an exemplary embodiment of the present invention includes: a front catalyst and a rear catalyst that are cylindrically shaped, coated with a metal catalyst, and disposed separately from each other; and a catalyst cover including an upper shell and a lower shell, and the upper and lower shells are semi-cylindrically shaped, wherein an end of the catalyst cover is connected with a front muffler pipe that is connected with an exhaust manifold and the other end of the catalyst cover is connected with a rear muffler pipe that emits an exhaust gas. The structures of a shell for a catalyst and for configuration of an oxygen sensor are simplified so that manufacturing process and cost are reduced and purifying performance is enhanced. Since back pressure is reduced, engine performance is enhanced.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2006-0097328 filed in the Korean Intellectual Property Office on Oct. 02, 2006, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002](a) Field of the Invention[0003]The present invention relates to a close-coupled catalytic converter. More particularly, the present invention relates to a close-coupled catalytic converter in which a structure of a shell for a catalyst and a structure for configuration of an oxygen sensor are simplified so that configuration performance is enhanced, and a rate of coating of a front catalyst is optimized so that efficiency of the catalytic converter is enhanced and manufacturing cost is reduced.[0004](b) Description of the Related Art[0005]A catalytic converter (or a catalyst converter) is a device that converts carbon monoxide, hydrocarbon, nitrous oxide, and so on, contained ...

AI Technical Summary

Benefits of technology

[0016]The present invention has been made in an effort to provide a close-coupled catalytic converter having the advantages that a structure of a shell for a catalyst and a structure for configuration of an oxygen sensor are simplified so that configuration performance is enhanced, and a rate of coating of a front catalyst is optimized so that efficiency of the catalytic converter is enhanced and manufacturing cost is reduced.

[0017]Also the present invention has been made in an effort to provide a close-coupled catalytic converter having the advantages that a front catalyst is closely disposed near an engine so that the light-off characteristic is improved, a coating ratio of a front catalyst is optimized, and efficiency of a cross-section of a rear catalyst is improved so that efficiency of a CCC catalytic converter is improved.

[0023]The front catalyst may be disposed near to the front muffler pipe at a second predetermined length in order to reduce a time to reach a temperature of activating the catalyst.

Problems solved by technology

However, this conventional catalytic converter requires a plurality of cones and shells so that a manufacturing cost of canning is high, and also requires a plurality of welding processes so that the manufacturing process is increased.

Because of a size of a diameter of a front shell, an assembly tool may often interfere with the shell during assembly of the shell to an exhaust manifold, a pipe, and so on.

However, it is difficult to dispose the front catalyst near an engine because of the above-mentioned interference.

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