A muffler for an exhaust system includes an exhaust gas duct pipe (20) and a wall (26). The wall (26) is connected to the exhaust gas duct pipe (20) in a first connection area (24) thereof by a thread meshing.

An exhaust system is for a marine propulsion device having an internal combustion engine. A catalyst housing has a housing inlet end that receives an exhaust gas flow from the internal combustion engine into the catalyst housing and an opposite, housing outlet end that discharges the exhaust flow out of the catalyst housing. A catalyst is disposed in the catalyst housing. The catalyst has a catalyst inlet end that receives the exhaust gas flow and an opposite, catalyst outlet end that discharges the exhaust gas flow. A catalyst mantel is on an outer periphery of the catalyst. The catalyst mantel has a mantel inlet end and an opposite, mantel outlet end. A radial flange is on at least one of the mantel outlet end and mantel inlet end. A connector mates with an inner diameter of the catalyst housing. The radially extending flange of the catalyst mantel is axially sandwiched between the connector and a radially inner shoulder of the catalyst housing.

An exhaust system for a vehicle includes a catalytic converter, an exhaust manifold, an outlet sensor in addition to inlet and outlet pipes. The catalytic converter includes an integrated oxygen sensor mount, an entry, and an outlet. The integrated oxygen sensor mount operatively configured to receive an outlet sensor. The exhaust manifold may be operatively configured to couple a vehicle combustion chamber to the entry of the catalytic converter via a front pipe. The inlet sensor may be affixed to the front pipe upstream of the catalytic converter wherein the inlet sensor and the outlet sensor are in communication with an engine control module. The outlet pipe may be affixed to the outlet of the catalytic converter.

A soot separator utilizing a toroid portion to centrifugally separate soot particles from the exhaust gas of an internal combustion engine. Upon lesser or no flow of exhaust gas, gravity causes the retained particles to fall within the bottom of the separator. The soot separator further includes a baffle to deflect particles and further enhance soot removal. A method utilizing this soot separator and association with an internal combustion engine are also described herein.

An exhaust system is for a marine propulsion device having an internal combustion engine. A catalyst housing has a housing inlet end that receives an exhaust gas flow from the internal combustion engine into the catalyst housing and an opposite, housing outlet end that discharges the exhaust flow out of the catalyst housing. A catalyst is disposed in the catalyst housing. The catalyst has a catalyst inlet end that receives the exhaust gas flow and an opposite, catalyst outlet end that discharges the exhaust gas flow. A catalyst mantel is on an outer periphery of the catalyst. The catalyst mantel has a mantel inlet end and an opposite, mantel outlet end. A radial flange is on at least one of the mantel outlet end and mantel inlet end. A connector mates with an inner diameter of the catalyst housing. The radially extending flange of the catalyst mantel is axially sandwiched between the connector and a radially inner shoulder of the catalyst housing.

A heat shield arrangement (14) for shielding the environment surrounding the junction between two sections (10, 13) of insulated vehicle exhaust from heat emanating from uninsulated end portions of the junction of the exhaust sections. The heat shield (14) is of tubular form and mounted on the insulation surrounding one section (10) of the exhaust and is slidingly movable between a first position (14) in which the junction between the two sections is exposed to allow access to work on fastening means (15) for holding the two sections together and a second position (14) in which the shield surrounds the junction and overlaps the ends of the insulation on both sections of the exhaust to insulate the surrounding environment.

A spherical exhaust pipe joint 1 includes an outer case 6, an inner case 8, a seal body 13 facing an inner peripheral surface 9 of the outer case 6 and an outer peripheral surface 11 of the inner case 8, a seal body 16 facing the inner peripheral surface 9 of the outer case 6 and the outer peripheral surface 11 of the inner case 8, and a wave spring 17 which is disposed between the outer case 6 and the inner case 8 to resiliently urge the seal bodies 13 and 16 in an axial direction toward one of the outer case 6 and the inner case 8.

In one aspect, a system for controlling the temperature of an exhaust reductant used within an exhaust treatment system of a work vehicle may generally include a tank having a plurality of walls defining an enclosed volume for containing the exhaust reductant. The tank may also include a threaded port defined through a first wall of the plurality of walls. The system may also include an electric heating device having a mounting portion and a heating element. The mounting portion may be configured to be screwed into the threaded port to couple to the electric heating device to the tank. In addition, the system may include a controller communicatively coupled to the electric heating device that is configured to control the operation of the electric heating device based on a temperature associated with the tank.

An exhaust system is for a marine propulsion device having an internal combustion engine. The exhaust system comprises a catalyst housing having a housing inlet end that receives exhaust gas flow from the internal combustion engine and an opposite, housing outlet end that discharges the exhaust gas flow. A catalyst is disposed in the catalyst housing. An outlet collector receives the exhaust gas flow from the catalyst housing. The outlet collector comprises a collector inlet end that is engaged with the housing outlet end. One of the collector inlet end and housing outlet end overlaps with the other of the collector inlet end and housing outlet end at a joint. A seal is disposed at the joint between the collector inlet end and the housing outlet end. The joint is devoid of a cooling water jacket.

A heat shield arrangement (14) for shielding the environment surrounding the junction between two sections (10, 13) of insulated vehicle exhaust from heat emanating from uninsulated end portions of the junction of the exhaust sections. The heat shield (14) is of tubular form and mounted on the insulation surrounding one section (10) of the exhaust and is slidingly movable between a first position (14) in which the junction between the two sections is exposed to allow access to work on fastening means (15) for holding the two sections together and a second position (14) in which the shield surrounds the junction and overlaps the ends of the insulation on both sections of the exhaust to insulate the surrounding environment.