Abstract: A method for filling a silencer with a sound absorbing material in which an inside of a shell is partitioned into a plurality of silencing chambers by a separator and at least one silencing chamber is filled with the material, the method including: forming a hole at the silencing chamber to be filled with the material in the shell; inserting a filling nozzle into the silencing chamber from the hole; injecting the material from the filling nozzle into the silencing chamber S2 for filling; and externally sealing the hole opening to the shell with a hole sealing member. An outer peripheral flange portion is abutted on and welded to an outer surface of the shell to seal the hole with the hole sealing member 8 allowing stably holding the silencer and easily filling the silencer with the material irrespective of a shell shape and a structure inside the shell.

Abstract: An exhaust flow control valve includes: a valve plate hinged to a downstream exhaust pipe to be pivotable, inside the pipe, between a fully closed position where a short-cut hole is closed and a fully open position where the short-cut hole is opened, the valve plate having a tip end directed toward a downstream side of the downstream exhaust pipe when at the fully open position; a spring receiving member provided to the downstream exhaust pipe to traverse the short-cut hole; and a valve spring having one end portion fastened to a tip end portion, which is located on the downstream side of the downstream exhaust pipe with respect to the spring receiving member, of the valve plate, and having an opposite end side being slidably in pressure contact with the spring receiving member, thereby generating a repulsive force to bias the valve plate toward the fully closed position.

Abstract: An exhaust flow control valve includes: a valve plate hinged to a downstream exhaust pipe to be pivotable, inside the pipe, between a fully closed position where a short-cut hole is closed and a fully open position where the short-cut hole is opened, the valve plate having a tip end directed toward a downstream side of the downstream exhaust pipe when at the fully open position; a spring receiving member provided to the downstream exhaust pipe to traverse the short-cut hole; and a valve spring having one end portion fastened to a tip end portion, which is located on the downstream side of the downstream exhaust pipe with respect to the spring receiving member, of the valve plate, and having an opposite end side being slidably in pressure contact with the spring receiving member, thereby generating a repulsive force to bias the valve plate toward the fully closed position.