The heat insulation structure for a component of an exhaust system of a piston engine is arrangeable around the component such that an air space is formed between the component and the heat insulation structure, and includes an outer shell layer a middle shell layer that is arranged inside the outer shell layer, and a first inner shell layer that is arranged inside the middle shell layer. A first air gap is arranged between the outer shell layer and the middle shell layer, a first insulation layer is arranged between the middle shell layer and the first inner shell layer, and the outer shell layer is provided with venting apertures for natural ventilation of the first air gap.

A downstream-side heat insulating material which is provided at a side face of a GPF which is positioned on a downstream side, in an exhaust-gas flowing direction, of plural in-line arranged catalysts has a first opening portion and a second opening portion which are provided for attaching supporting members.

An aftertreatment system comprises a SCR system. The SCR system includes a housing having an inlet, an outlet and defining an internal volume. At least one catalyst can be positioned within the internal volume. A mounting support is positioned around at least a portion of a perimeter of the housing. A heat shield is positioned around the perimeter of the housing such that the housing is positioned substantially within the heat shield. A portion of the heat shield is disposed on and in contact with the mounting support. A clamp is positioned around a heat shield perimeter. The clamp is positioned on the portion of the heat shield disposed on and in contact with the mounting support. The mounting support is configured to transmit a clamping force of the clamp on the heat shield to the housing to prevent buckling of the heat shield from the clamping force.

A decomposition reactor for an exhaust system includes an exterior component defining an internal volume and having an inlet and an outlet with the inlet and outlet are formed on a same side of the exterior component. A flow divider is positioned within the internal volume and defines a thermal management chamber and a main flow chamber. A first flow path of exhaust flows from the inlet into the main flow chamber to mix with dosed, and a second flow path of exhaust flows from the inlet into the thermal management chamber to control a temperature of a portion of the flow divider. In some implementations, one or more swirling diverters can be coupled to the flow divider and positioned proximate the outlet of the exterior component to impart a vortical motion to a combined reductant and exhaust gas flow exiting out the outlet.

A heat insulator includes a first covering part and a second covering part. The first covering part is configured to cover a bent part formed in an exhaust pipe of an internal combustion engine. The first covering part has a plurality of slits extending in a circumferential direction of the exhaust pipe. The plurality of slits are arranged with a given space from each other in a direction in which the exhaust pipe extends such that a plate part between slits is present between the plurality of slits. The second covering part covers the other part of the exhaust pipe than the bent part. At least a part of the second covering part is bonded to the exhaust pipe.

A method for producing a device for the aftertreatment of exhaust gases and for coating a honeycomb body, provided in the device, with a catalytically active surface coating. The honeycomb body is formed from a multiplicity of metallic, at least partially structured foils stacked one on another and wound so that the honeycomb body forms a multiplicity of flow channels through which fluid can flow along a main flow direction. The honeycomb body is received in an inner casing and is durably connected thereto. The inner casing is arranged in an outer casing serving as a housing and is durably connected thereto. Before the introduction of the catalytically active coating into the flow channels formed by the honeycomb body, an air gap or air gaps, which have been formed between the outer casing and the components arranged therein, are filled by a filler.

Insulation system for thermoacoustic insulation of a component to be insulated, such as an exhaust gas component, comprising a fiber molded part having a surface facing away from the component to be insulated, where the surface facing away is at least in part jacketed with a cladding, and having an insulation surface facing the component to be insulated, where the fiber molded part is applied to the component to be insulated such that at least one cavity is formed between a portion of the insulation surface of the fiber molded part and the component to be insulated.

A thermal management system for an aftertreatment system includes an air pump and a compressed air rail. The compressed air rail is fluidly connected with the air pump. The thermal management system further includes a first valve located between the compressed air rail and an exhaust outlet pathway. The first valve is configured to selective supply air to the aftertreatment system of the engine. The thermal management system further includes a heater located between the compressed air rail and the first valve. The heater is configured to heat the air before supplying air to the aftertreatment system of the engine.

An emissions cleaning module is provided including a first support, a second support and a mixer module. The mixer module extends between the first support and the second support. The mixer module includes an outer body and an inner body located within the outer body. In addition the outer body is fixedly retained to the first support and the second support. Further, a first end of the inner body is slidingly retained within the outer body, and a second end of the inner body is fixedly retained relative to the outer body at or near the second support.

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.