Patent ID: 8950547
Filing Date: 2015-02-10
Classification: F01N,Y10T

Abstract:
1. An engine muffler comprising: a cylindrical muffler body; and at least one partition plate partitioning an interior of the muffler body in a longitudinal direction of the muffler body into a plurality of expansion chambers, the muffler body being constructed of a plurality of divided muffler body members divided from each other in the longitudinal direction at a position of the partition plate, a gap being provided between opposed end portions of the plurality of divided muffler body members, the partition plate having an annular section held in fitting engagement with an inner peripheral surface of at least one of the opposed end portions of the plurality of divided muffler body members, the partition plate being disposed in such a manner as to close the gap, the opposed end portions of the plurality of divided muffler body members being welded, from a radially outward direction of the muffler body, to an outer peripheral surface of the annular section along respective entire perimeters thereof, wherein the annular section has a flat flange portion formed integrally with and along an entire perimeter of an outer peripheral portion of the annular section to extend radially outward from a distal end of the outer peripheral portion of the annular section through the gap, and a cylindrical extension portion extending in an axial direction of the annular section from a radially outward end of the flange portion, wherein the extension portion is located opposite from the outer peripheral portion across the flange portion and has an inner peripheral surface held in fitting engagement with an outer peripheral surface of other of the opposed end portions, and wherein the opposed end portions of the divided muffler body members are welded, from the radially outward direction, to the outer peripheral surface of the annular section along the respective entire perimeters by the one of the opposed end portions being welded, from the radially outward direction, to the flange portion along the entire perimeter thereof and by the other of the opposed end portions being welded, from the radially outward direction, to a distal end of the extension portion along the entire perimeter thereof.