Patent ID: 9022170
Filing Date: 2015-05-05
Classification: F01N

Abstract:
1. A muffler equipped with a catalytic converter, comprising: a muffler box; an exhaust inlet pipe provided to the muffler box and connected to an engine; an exhaust outlet pipe provided to the muffler box and opened to atmosphere; a catalytic converter disposed in an exhaust path inside the muffler box, the exhaust path communicating between the exhaust inlet pipe and the exhaust outlet pipe; and a cylindrical holding tube disposed in the muffler box, the cylindrical holding tube housing and holding the catalytic converter, wherein the muffler box includes first and second box halves joined together with open surfaces thereof abutting each other, and first and second partition plates interposed between the first and second box halves and overlapping each other to separate inside of the muffler box into first and second silencing chambers and define a third silencing chamber between the first and second partition plates, one end opening of the cylindrical holding tube is connected to the exhaust inlet pipe, the pair of partition plates support the holding tube in such a way as to wrap an outer peripheral surface of the holding tube, and the other end opening of the holding tube is communicated with the exhaust outlet pipe through the first, second, and third silencing chambers in this order, wherein the first and second partition plates include a gap therebetween, the cylindrical holding tube is disposed in the gap, and the third silencing chamber is a part of the gap.