A vehicle exhaust system includes a tubular component which allow passage of exhaust gases therethrough. The tubular component includes an upstream pipe having a first end and a second end. The tubular component further includes a downstream pipe having a third end and a fourth end. The third end of the downstream pipe at least partially encloses the second end of the upstream pipe such that the upstream pipe and the downstream pipe together define a junction region and the fourth end defines a primary exhaust gas flow path. The downstream pipe at least partially defines an opening within the junction region such that the opening provides a secondary exhaust gas flow path.

An exhaust pulse balance chamber comprising a circular collar, mid-section that bulges at its center, skirt, and right and left legs, all of which are sealed to the exterior environment and in fluid communication with one another. The outer diameter of the skirt increases in width but not in depth from the proximal end of the skirt to the distal end of the skirt, which is configured to receive the right and left legs. Each leg is bent at a 30-degree angle relative to the central longitudinal axis of the exhaust pulse balance chamber. The invention includes a method of using the exhaust pulse balance chamber to convert a vehicle from a dual-in, single-out exhaust system to a dual-in, dual-out exhaust system.

A heating disk for heating up a stream of exhaust gas and/or a component for exhaust gas aftertreatment has a honeycomb body, wound from a plurality of smooth and corrugated metal layers stacked on top of one another. The honeycomb body is received within a carrier shell and an electrical contact is fed through the carrier shell. The honeycomb body is connected to a current source via the electrical contact. The electrical contact has a contact strip within the carrier shell extending in the circumferential direction of the carrier shell. An insulating region is formed between the carrier shell and the contact strip. A plurality of stacks of layers are electrically insulated from one another. Each of the stacks of layers are formed from the plurality of smooth and corrugated metal layers, and which are arranged directly adjacent to one another and conductively connected to the contact strip.

An element frame for holding monoliths containing catalysts in the flow of exhaust gases from a combustion source, the element frame comprising two pairs of opposing walls, wherein the walls form a rectangular or square shape, an interior formed by the walls, an inlet end, an outlet end, at least one locking element, at least one mat and at least one monolith comprising an inlet, an outlet, four sides and at least one catalyst effective in reducing the concentration of one or more gases in the exhaust gas, wherein the at least one mat and the at least one monolith being positioned in the interior of the element frame so that there is at least one mat between the monolith and each adjacent wall, each locking element extending across the inlet end or outlet end of the element frame and being connected to two opposite sides of the element frame.

A vehicle exhaust system for allowing passage of exhaust gasses therethrough. The vehicle exhaust system has a first pipe having a first end and a second end. The first end defines an exhaust gas inlet and the second end defines an exhaust gas outlet. The vehicle exhaust system also has a second pipe positioned downstream of the first pipe and has a third end and a fourth end. At least a portion of the second end of first pipe is positioned within the third end of the second pipe defining an overlap between the second end of the first pipe and the third end of the second pipe. The first pipe and the second pipe together define a volume for the exhaust gasses. The volume comprises a first volume passageway between the exhaust gas inlet and the exhaust gas outlet and a second volume passageway defined by the overlap of the second pipe and the first pipe and having an inlet for exhaust gasses into the second volume passageway and an outlet from the second volume passageway positioned axially upstream of inlet. The inlet is positioned downstream of the exhaust gas outlet

A muffler for an exhaust system of a vehicle comprises an outer housing in an interior of which a Helmholtz chamber is formed. A feed body has an opening fluidically connected to the Helmholtz chamber. At least two exhaust pipes extend at least in sections within the outer housing, are spaced apart from each other, and form a flow path for an exhaust gas through the outer housing. The exhaust pipes each have at least two exhaust pipe sections which are entirely spaced apart from each other by a gap in one flow direction of the exhaust gas. The feed body surrounds the exhaust pipes over an entire circumference in a region of the gaps and fluidically connects the exhaust pipes to the Helmholtz chamber.

This ferritic stainless steel pipe contains, by mass %: C: 0.001% to 0.100%; Si: 0.01% to 2.00%; Mn: 0.01% to 2.00%; P: 0.001% to 0.05%; S: 0.0001% to 0.005%; Cr: 10.5% to 20.0%; Sn: 0.001% to 0.600%; Ti: 0.001% to 1.000%; Al: 0.001% to 0.100%; and N: 0.001% to 0.02%, with a balance being Fe and unavoidable impurities, the ferritic stainless steel pipe includes a pipe-end-thickened portion at a pipe end portion, and a gap distance d (μm) formed at the pipe end portion satisfies a relationship of d≥Cr.sup.2/(1000Sn) (in the expression, Cr and Sn represent amounts (mass %) of respective elements).

A process for manufacturing an exhaust system, especially for an internal combustion engine of a vehicle, includes providing an exhaust gas-guiding component (26) with a wall (38) made of a metallic material and providing a sensor-mounting connector (22), to be fixed at the wall. The sensor-mounting connector includes a sensor-mounting area (28) to be positioned outside the exhaust gas-guiding component, and a connection area (34), which is to be positioned such that the connection area meshes with the wall. The connection area is pressed against an outer surface (40) of the wall of the exhaust gas-guiding component in a fastening area (39) of the wall, and at the same time rotated about a longitudinal axis (A) of the connector to penetrate into the material forming the wall and a connection in substance is established between the metallic material of the wall and the metallic material of the sensor-mounting connector.

A vehicle exhaust system includes an inner pipe in which exhaust gas from an internal combustion engine flows, and an outer pipe surrounding a part of the inner pipe. One end of the outer pipe is formed to have a diameter smaller than that of other portions of the outer pipe, and fixed to an outer surface of the inner pipe. A region of the outer pipe from the other end before the one end is a free region unattached to the outer surface of the inner pipe.

The invention relates to a method for replacing an exhaust aftertreatment component of an exhaust aftertreatment system in a vehicle or vessel. The exhaust aftertreatment system is delimited by an outer casing and comprises a first sleeve, which extends in an axial direction and contains a first exhaust aftertreatment component mounted directly in the first sleeve. The method comprises the steps of: removing the first exhaust aftertreatment component from the first sleeve, the first sleeve thereby remaining intact within the outer casing, providing a second exhaust aftertreatment component being mounted in a second sleeve, the second sleeve being configured to fit within the first sleeve, and mounting the second sleeve with the second exhaust aftertreatment component in the first sleeve by inserting the second sleeve into the first sleeve in the axial direction thereof.