Patent ID: 6250075
Filing Date: 2001-06-26
Classification: F01N

Abstract:
An engine muffler comprising:a first expansion chamber for exhaust gas which includes an exhaust gas inlet to be connected to an exhaust port of an engine;a second expansion chamber which includes an exhaust gas outlet;a first exhaust gas purifier in which a catalyst for purifying exhaust gas is coated on at least a concave surface of a concave base body which has a plurality of vent holes passing through said concave surface, said first exhaust gas purifier being disposed in said first expansion chamber such that said concave surface faces said exhaust gas inlet; andat least one second exhaust gas purifier in which a catalyst for purifying exhaust gas is coated on a base body having many pores, said second exhaust gas purifier being disposed between said first expansion chamber and said second expansion chamber,wherein said first expansion chamber and said second expansion chamber are at least defined by dividing the inside of a muffler body with a partition plate, and adhesion of said partition plate to the inner wall of said muffler body and adhesion of said second exhaust gas purifier to said partition plate are conducted by soldering in a continuous hydrogen furnace in the absence of oxygen.