A muffler including an inlet member, an outlet member, an exhaust-gas cleaning device including an exhaust-gas cleaning material, the exhaust-gas cleaning device including a first inlet side coupling section and a first outlet side coupling section detachably coupled to the inlet member and the outlet member by couplers, and an intermediate member including a second inlet side coupling section and a second outlet side coupling section detachably coupled to the inlet member and the outlet member by couplers same as the couplers, instead of the exhaust-gas cleaning device. The intermediate member is a cylinder body allowing exhaust gas in the inlet member to flow directly to the outlet member without passing through the exhaust gas cleaning material, and includes a resistance generation section providing the intermediate member with exhaust resistance substantially equal to that of the exhaust-gas cleaning device.

The muffler for a motorized vehicle includes a housing with an inlet chamber and an outlet chamber, an exhaust inlet, and an exhaust outlet. The muffler includes a first channel with a first noise dampening amount that is within the housing interior, to fluidly connect the inlet chamber and the outlet chamber. The muffler includes second channel with a second noise dampening amount that is within the housing interior between the inlet chamber and the outlet chamber. The first noise dampening amount is greater than the second noise dampening amount. A valve selectively fluidly connects the inlet chamber and the outlet chamber thorough the second channel, and is configured to variably obstruct the flow of exhaust gas through the second channel. In various embodiments, the muffler has more than one inlet chamber and more than one exhaust outlet.

The muffler for a motorized vehicle includes a housing with an inlet chamber and an outlet chamber, an exhaust inlet, and an exhaust outlet. The muffler includes a first channel with a first noise dampening amount that is within the housing interior, to fluidly connect the inlet chamber and the outlet chamber. The muffler includes second channel with a second noise dampening amount that is within the housing interior between the inlet chamber and the outlet chamber. The first noise dampening amount is greater than the second noise dampening amount. A valve selectively fluidly connects the inlet chamber and the outlet chamber thorough the second channel, and is configured to variably obstruct the flow of exhaust gas through the second channel. In various embodiments, the muffler has more than one inlet chamber and more than one exhaust outlet.

A structure pof muffler may include a housing which has a space therein, and has a first side connected to an inlet pipe into which exhaust gas flows, a first baffle which divides an interior of the housing into a front chamber and an intermediate chamber connected to the inlet pipe, a second baffle which divides the interior of the housing into a rear chamber and the intermediate chamber connected to the inlet pipe, and a discharge pipe which is mounted to penetrate the first baffle and the second baffle, and mounted such that a first end of the discharge pipe is positioned in the rear chamber, and a second end of the discharge pipe extends through the front chamber and penetrates the housing.

A structure pof muffler may include a housing which has a space therein, and has a first side connected to an inlet pipe into which exhaust gas flows, a first baffle which divides an interior of the housing into a front chamber and an intermediate chamber connected to the inlet pipe, a second baffle which divides the interior of the housing into a rear chamber and the intermediate chamber connected to the inlet pipe, and a discharge pipe which is mounted to penetrate the first baffle and the second baffle, and mounted such that a first end of the discharge pipe is positioned in the rear chamber, and a second end of the discharge pipe extends through the front chamber and penetrates the housing.

Disclosed is an exhaust-gas after-treatment device for an internal combustion engine, in particular for a ship's diesel internal combustion engine that is operated with heavy oil, including: a housing through which exhaust gas flows; exhaust-gas purification chambers formed in the housing, which chambers hold catalysts and/or particulate filters in order to purify the exhaust gas; and muffler chambers formed in the housing, which chambers have a defined depth for muffling sound in the flow direction. The exhaust-gas purification chambers and the muffler chambers are arranged spatially in series and parallel to one another on the flow side.

Described is a turbosonic generator for generating electricity for a vehicle and for attenuating sound from the vehicle's internal combustion engine. The turbosonic generator comprises a turbosonic generator housing, a driveshaft, a ventilated tube enclosing the driveshaft, the ventilated tube comprising first and second ends, the first end formed through a first end partition of the turbosonic generator housing and comprising an inlet for receiving exhaust gasses from a vehicle engine, and the second end sealed for preventing the exhaust gasses from escaping through the second end, the ventilated tube further comprising exhaust orifices for allowing the exhaust gasses to escape the ventilated tube, and means, coupled to a first end of the driveshaft, for producing electricity as the exhaust gasses cause the driveshaft to rotate.

Described is a turbosonic generator for generating electricity for a vehicle and for attenuating sound from the vehicle's internal combustion engine. The turbosonic generator comprises a turbosonic generator housing, a driveshaft, a ventilated tube enclosing the driveshaft, the ventilated tube comprising first and second ends, the first end formed through a first end partition of the turbosonic generator housing and comprising an inlet for receiving exhaust gasses from a vehicle engine, and the second end sealed for preventing the exhaust gasses from escaping through the second end, the ventilated tube further comprising exhaust orifices for allowing the exhaust gasses to escape the ventilated tube, and means, coupled to a first end of the driveshaft, for producing electricity as the exhaust gasses cause the driveshaft to rotate.

Methods of and systems for quantifying a degree of texturization of fibrous materials, such as muffler fill materials, are disclosed.

Methods of and systems for quantifying a degree of texturization of fibrous materials, such as muffler fill materials, are disclosed.