An automotive vehicle includes an exhaust aftertreatment system. The exhaust aftertreatment system includes a mixer, a doser that injects a reducing agent into the mixer, and a selective catalytic reduction unit. The exhaust aftertreatment system mixes exhaust gases and the reducing agent for treatment prior to the exhaust gases being discharged into the atmosphere. Some components of the exhaust aftertreatment system are positioned proximate to an associated combustion engine to minimize thermal energy loss from the exhaust gases prior to interaction with the exhaust aftertreatment system.

A duct interface system and method includes a duct having a first end and a second end; a first receptacle for the first end of the duct and/or a second receptacle for the second end of the duct; and one or more first seals between the first end of the duct and the first receptacle and/or one or more second seals between the second end of the duct and the second receptacle.

A modular system for exhaust heat recovery devices has heat exchangers which differ by different external dimensions, in particular different cross-sections, and identically configured exhaust gas carrying housings into each of which one of the heat exchangers can be introduced. Various tubular adapters are adapted to the external dimensions of the heat exchangers and are used to fasten the associated heat exchanger at its connection ends to the exhaust gas carrying housing. Furthermore, a tubular adapter for a corresponding modular system and a vehicle which has a corresponding exhaust heat recovery device are provided.

An exhaust muffler includes a first muffler section connected to an exhaust pipe and a second muffler section connected to the first muffler section. Exhaust gases delivered from the exhaust pipe are discharged from the first muffler section and the second muffler section out of the exhaust muffler. The first muffler section includes a tubular member made up of an inner pipe to which the exhaust pipe is connected and an outer pipe covering the inner pipe, and a connector connecting the tubular member and the second muffler section to each other. The first muffler section has a first expansion chamber defined therein between the inner pipe and the outer pipe. The inner pipe houses therein a valve for changing an amount of exhaust gases passing through the inner pipe. The first muffler section includes a curved portion that is curved vertically as viewed in side elevation of the vehicle. The exhaust muffler has a second expansion chamber defined in the second muffler section rearward and upward of the first muffler section, the second expansion chamber having a cross-sectional area larger than a cross-sectional area of the first expansion chamber. There is thus provided an exhaust device for an internal combustion engine, which includes a muffler compact in a longitudinal direction thereof.

An exhaust gas converter body structure includes a main body, an inlet structure, and an outlet structure. The main body is configured to receive an exhaust gas converter between the inlet structure and the outlet structure. The inlet structure and the main body have complementary coupling geometries at a first joint. The outlet structure and the main body have complementary coupling geometries at a second joint. The coupling geometries of each of the inlet structure and the main body are at the first joint asymmetric or reflection-symmetric with respect to exactly one plane of symmetry and/or the coupling geometries of each of the outlet structure and the main body are at the second joint asymmetric or reflection-symmetric with respect to exactly one plane of symmetry. The configuration establishes a given angular position between the inlet structure and the main body and/or between the outlet structure and the main body.

An exhaust enclosure system may include an inner insulation assembly circumferentially surrounding an outlet pipe of an engine exhaust manifold. The inner insulation assembly may be in direct contact with the exhaust manifold. The exhaust enclosure system may include a cover enclosing the inner insulation assembly. The cover may be physically separated from the inner insulation assembly by a circumferential air gap disposed between the inner insulation assembly and the cover.

An exhaust additive distribution arrangement for an exhaust system of an internal combustion engine (2) includes an exhaust duct element (14), an exhaust additive injection unit (20), and a primary vaporization element (16); wherein the primary vaporization element (16) is a tubular body arranged in the interior of the exhaust duct element (16), has a predefined space between an inner surface of the exhaust duct element (14) and an outer surface of the primary vaporization element (16), and protrudes from the exhaust duct element (14) at an outlet end; and wherein the exhaust additive injection unit (20) is arranged to inject exhaust additive liquid from a point at the inner surface of the exhaust duct element (14) towards an inner surface of the primary vaporization element (16). The exhaust additive injection unit (20) is of the liquid-only type, and the primary vaporization element (16) has a length that is sufficiently short to allow injected exhaust additive liquid to run off of the outlet end of the primary vaporization element (16). The present invention also concerns an exhaust additive distribution system and a vehicle (1) comprising the exhaust additive distribution arrangement.

Various structures for catalytic convertors are disclosed herein. The device includes an outer housing enclosing a catalytic core. The catalytic core can be formed in a myriad of ways. Flow paths through the core are constructed so that they are not straight-line paths from the inlet of the device to the outlet of the device. Pleated conformations and stacked core arrays are described that maximize the catalytic surface area in a given volume of housing. The application of the core to exhaust from diesel engines is also disclosed.

A method of manufacturing a cylindrical housing of an exhaust-gas treatment unit for vehicles includes providing a flat sheet metal part having at least one embossing, and round bending the sheet-metal part in a round bending tool by displacing the sheet metal part between rolls such that the sheet metal part obtains a cylindrical shape having a longitudinal direction parallel to roll axes of the rolls. At least one elastic roll is used such that the embossing of the sheet metal part is maintained during round bending. The longitudinal edges of the cylindrical sheet metal part are then connected to form a tube. A method of manufacturing an exhaust-gas treatment unit is furthermore shown.

An exhaust heat recovery unit, includes: a heat exchanger that is provided inside an exhaust pipe through which exhaust gas flows, the heat exchange being formed from silicon carbide, and the heat exchanger performing heat exchange between the exhaust gas and a heat medium; and a retention member that is provided at the periphery of the heat exchanger, is formed of a ceramic sheet or an expandable graphite sheet, and is sandwiched between the exhaust pipe and the heat exchanger, thereby retaining the heat exchanger in the exhaust pipe.