Fixing Device of Catalyst Substrate

Abstract

A fixing device includes a muffler and a catalyst mantle. The muffler is communicated with an exhausting route of an internal combustion engine. The muffler has at least one clapboard to divide inner space thereof for forming a plurality of expanding rooms, which are communicated with each other and configured for guiding waste gas. The catalyst mantle is integrated on the clapboard. The catalyst mantle has an admission terminal and an exhaust terminal communicated with the plurality of expanding rooms. A substrate having catalyst coated thereon is arranged in the catalyst mantle between the admission terminal and the exhaust terminal. At least one block is configured for preventing the substrate sliding to the exhaust terminal and a stopper is formed on the clapboard or an inner wall of the muffler for preventing the substrate sliding to the admission terminal. The fixing device improves the fixing capacity of the substrate, and decreases the manufacturing steps for arranging the catalyst mantle in the muffler.

Description

1. FIELD OF THE INVENTION[0001]The present invention relates to a catalytic converter arranged in a muffler of an internal combustion engine, and more particularly to a fixing device of catalyst substrate preventing the catalyst substrate of the catalyst converter sliding to a guiding or an exhausting direction.2. DESCRIPTION OF THE RELATED ART[0002]For satisfying increasingly strict standard for exhausting waste gas, manufacturers generally use at least one catalytic converter arranged in an exhausting route of an internal combustion engine which is arranged in cars, motorcycles or mowers, etc. The catalytic converter has a metal mantle and at least one metal substrate having catalyst coated thereon. The catalyst generally is selected from a group of noble metal consisting of palladium (Pd), platinum (Pt), rhodium (Rh), etc., for cleaning the waste gas and reducing the pollution of the waste gas.[0003]The metal substrate is generally formed by welding and coupling a flat foil and a...

AI Technical Summary

Benefits of technology

[0007]A fixing device of catalyst substrate, in accordance with a preferred embodiment of the present invention, includes a muffler and a catalyst mantle. The muffler is communicated with an exhausting route of an internal combustion engine. The muffler has at least one clapboard to divide inner space thereof for forming a plurality of expanding rooms, which are communicated with each other and configured for guiding waste gas. The catalyst mantle is integrated on the clapboard. The catalyst mantle has an admission terminal and an exhaust terminal communicated with the plurality of expanding rooms. A substrate having catalyst coated thereon is arranged in the catalyst mantle between the admission terminal and the exhaust terminal. The catalyst mantle further includes at least one block configured for preventing the substrate sliding to the exhaust terminal.

[0010]The block is scraggy or corrugated, and has at least one groove attached on the substrate for preventing the substrate sliding, and at least one protrusion spacing from the groove to form a vent hole.

[0012]Therefore, the present fixing device decreases the steps for fixing the substrate in the metal mantle to increase the fixing capacity of the substrate, and integrates the clapboard in the muffler to decrease the steps for arranging the catalyst converter in the muffler and increase the efficiency for assembling the catalyst substrate and the catalyst mantle in the muffler.

Problems solved by technology

However, the cost is high by welding the flat foil and the corrugated foil of the metal substrate, and welding the metal substrate and the metal mantle.

Furthermore, when the metal mantle is arranged on the exhausting route of a muffler, the metal mantle must be welded to be fixed on a clapboard of the muffler; thus, the steps and the costs are also increased.

Images