An exhaust manifold heat dissipation cover coupling device for thermal stress and vibration deflection is proposed. The device has a function of preventing wear of a heat dissipation cover to couple an exhaust manifold heat dissipation cover, the device being able to improve the durability of various parts including a heat dissipation cover by attenuating multi-directional vibration that is transmitted from an exhaust manifold when the heat dissipation cover is installed outside the exhaust manifold, being able to prevent damage to parts due to thermal stress by flexibly coping with thermal deformation such as thermal contraction or thermal expansion even if the thermal deformation is generated by high-temperature heat transmitted from the exhaust manifold, and being able to prevent frictional damage of the heat dissipation cover due to friction by a component that slides to attenuate vibration.

An exhaust gas treatment assembly for an exhaust gas system of an internal combustion engine includes a housing defining a longitudinal axis. A first exhaust gas treatment unit is inserted in the housing and has a first casing and at least one first exhaust gas treatment unit carried in the first casing. A second exhaust gas treatment unit is inserted in the housing and has a second casing and at least one second exhaust gas treatment unit carried therein. A locking arrangement is for locking a first exhaust gas treatment unit in the housing at least against movement in the direction of the longitudinal axis in a locked state, wherein, when the first exhaust gas treatment unit and the second exhaust gas treatment unit are inserted in the housing, the locking arrangement is blocked in the locked state by the second exhaust gas treatment unit.

A connection device for an exhaust gas turbocharger has a bent first element with a first tensioning arm at a first end. A second bent element has a second tensioning arm at a second end opposite the first end. A third end of the first element is formed opposite a fourth end of the second element. The first tensioning arm and the second tensioning arm are connectable by a first connecting element. The third end and the fourth end are movably connected with each other by a second connecting element. A transition is elastically formed between the respective tensioning arm and a supporting portion of the particular element, which extends between the tensioning arm and the third or fourth, respectively, end. The first element or the second element is formed in a profiled manner.

An exhaust gas purification device includes an upstream cylinder, a downstream cylinder, and a purifying cylinder. The upstream cylinder, the purifying cylinder, and the downstream cylinder each have at an end thereof a flange portion having a flat connecting surface. Each flange portion of one of the upstream and downstream flange portions of the purifying cylinder, and the flange portions of the upstream cylinder and the downstream cylinder includes an engagement pin having an engagement recess portion. Each flange portion of the other includes a pin hole and an engagement groove. The engagement recess portion is fitted into and engaged with the engagement groove.

This fastening structure 100 on the exhaust side of an internal combustion engine 1 is provided with: a male threaded shaft 10; a pressing body 20 screwed or fixed to the male threaded shaft 10; a through-hole 30 which is formed in a fastening target component 3 and into which the male threaded shaft 10 is inserted; a threaded hole 40 which is formed in a component 2 to be fastened and into which the male threaded shaft 10 is screwed; and a tubular component 50 which is interposed between the pressing body 20 and the fastening target component 3 and into which the male threaded shaft 10 is inserted. The tubular component 50 has a linear expansion coefficient α2 that is greater than the linear expansion coefficient α1 of the fastening target component 3.

A pipe, especially an internal combustion engine, exhaust system, exhaust gas-guiding pipe, includes a connection area (26). The connection area (26) is at an axial pipe end (12) for connecting the pipe (14) extending in a pipe longitudinal axis (A) to another pipe (16) to be pushed into the connection area (26). The connection area (26) includes two slots (18a, 18b). The slots (18a, 18b) include a first slot area (20a, 20b), located closer to the pipe end (12), and a second slot area (22a, 22b), located axially farther away from the pipe end (12) and offset in a circumferential direction in relation to the first slot area (20a, 20b). The second slot areas (22a, 22b) of the two slots (18a, 18b) are offset toward one another or away from one another in the circumferential direction in relation to the first slot areas (20a, 20b).

An exhaust manifold heat dissipation cover coupling device for thermal stress and vibration deflection is proposed. The device has a function of preventing wear of a heat dissipation cover to couple an exhaust manifold heat dissipation cover, the device being able to improve the durability of various parts including a heat dissipation cover by attenuating multi-directional vibration that is transmitted from an exhaust manifold when the heat dissipation cover is installed outside the exhaust manifold, being able to prevent damage to parts due to thermal stress by flexibly coping with thermal deformation such as thermal contraction or thermal expansion even if the thermal deformation is generated by high-temperature heat transmitted from the exhaust manifold, and being able to prevent frictional damage of the heat dissipation cover due to friction by a component that slides to attenuate vibration.

The present disclosure is directed to a flexible pipe assembly that includes a pipe, a sleeve, a first connection assembly, and a second connection assembly. The pipe of the flexible pipe assembly includes a first end portion that is coupled to an external vertical exhaust pipe that allows exhaust to escape from a truck and a second end portion that is coupled to a pipe to an outlet of an exhaust aftertreatment system (EAS). The pipe also includes a third portion, which is a bellows, coupling the first end portion to the second end portion of the pipe of the flexible pipe assembly. The first and second connection assemblies couple the sleeve to the pipe of the flexible pipe assembly by passing through holes in the sleeve and the pipe of the flexible pipe assembly.

An after treatment system (ATS) for a vehicle having an ATS module includes, fluidly connected in series, an inlet, a Diesel Oxidation Catalysts (DOC), a urea mixer and a Selective Catalytic Reduction (SCR), and an outlet. The inlet is fluidly connected to an output of an engine of the vehicle and the outlet is fluidly connected to an outlet tube of the vehicle. The inlet, DOC, mixer, SCR and outlet are arranged to define a substantial rectangular path of a flow (F) of exhaust gases flowing in the ATS, with the inlet and the outlet being positioned at a same vertex of the substantial rectangular path of the flow (F).

An exhaust pipe structure of an internal combustion engine vehicle is provided, which includes a coupling part coupling a first exhaust pipe to a second exhaust pipe disposed serially. The coupling part includes an insertion pipe part formed in the second exhaust pipe, an outer circumferential pipe part formed in the first exhaust pipe and to which the insertion pipe part is inserted, an inner circumferential pipe inserted into the outer circumferential pipe part, an annular protrusion formed in the second exhaust pipe and protruding radially outward from the entire circumference of the insertion pipe part, and a clamp member coupling the outer circumferential pipe part to the annular protrusion. The clamp member has a band part wrapped radially outside around a part where a flare part of the outer circumferential pipe part overlaps with the annular protrusion, and a tightening part tightening the band part.