Abstract: A directional exhaust valve for controlling a flow of exhaust gas includes a housing having an inlet port and at least two outlet ports. Arranged movably within the housing is a control element which has a passageway to connect the inlet port with at least one of the outlet ports while closing at least in part the other one of the outlet ports. The control element is configured in the form of a hollow cylinder which is closed on one end and has an outer surface area formed with an opening, with the passageway extending between an open end face of the control element and the opening.

Abstract: An exhaust-noise attenuation muffler includes two half-shells, each including an inner shell and an outer shell which are made through deep drawing of a sheet metal blank which can have a thickness between 0.3 mm and 0.5 m. The inner shell or the outer shell is provided with an embossment. After placing the inner shells in corresponding ones of the outer shells to form half-shells, two complementing half-shells are joined together.

Abstract: An exhaust-noise attenuation muffler includes two half-shells, each including an inner shell and an outer shell which are made through deep drawing of a sheet metal blank which can have a thickness between 0.3 mm and 0.5 m. The inner shell or the outer shell is provided with an embossment. After placing the inner shells in corresponding ones of the outer shells to form half-shells, two complementing half-shells are joined together.