An exhaust system for a vehicle having an internal combustion engine includes an exhaust pipe having a central axis and configured to receive an exhaust gas flow from the engine, a catalytic converter disposed within the exhaust pipe, and an exhaust gas burner assembly having a burner unit configured to generate and supply a heated burner flow to a supply pipe. An outlet end of the supply pipe is disposed within the exhaust pipe and extends substantially parallel to the exhaust pipe central axis such that the exhaust gas flows around the supply pipe outlet end. A plurality of mixing apertures are formed in the supply pipe outlet end and configured to promote mixing of the heated burner flow and the exhaust gas flow to disperse heat over the catalytic converter for rapid heating thereof.

A sinuous balanced mid-pipe exhaust system has a straight mid-pipe and a sinuous mid-pipe disposed intermediate manifold and muffler. The manifold has a differential bilateral manifold pipe length. The longer manifold pipe connected to the straight mid-pipe and the shorter manifold pipe connected to the sinuous mid-pipe. Sinuous mid-pipe has 2-3 sinusoidal curved segments such that a sinuous gas flow path therethrough substantially equals the straight pipe flow path length and the manifold differential pipe length. The method balances and equalizes gas flows by defining straight gas flow path, having a path length and defining a sinuous gas flow path with at least two sinusoidal segments which is equal to the path length and the differential path length.

An exhaust line for a vehicle includes a muffler extending in an axial direction and having a circumferential wall, and a particulate filter arranged upstream of the muffler. The muffler has a chamber having a lateral inlet in the circumferential wall and at least one pipe having a microperforated portion extending in the axial direction and having a sound damping effect. The microperforated portion is arranged in the chamber, and the pipe extends out of the chamber. The muffler is configured such that exhaust gas flows via the lateral inlet radially through the microperforated portion into the pipe and via the pipe out of the muffler. Furthermore, a vehicle having such an exhaust line is provided.

A catalytic converter (11) for exhaust gas purification is formed by disposing a retaining mat (14) between an inner peripheral face of a metal shell (12) and an outer peripheral face of a catalyst support (13), and retaining the catalyst support (13) in an interior of the metal shell (12) by the retaining mat (14). Since a thickness of the retaining mat (14) in a released state after being heated by exhaust gas is 210% or greater of a clearance (α) between the inner peripheral face of the metal shell (12) and the outer peripheral face of the catalyst support (13), it is possible to reliably retain the catalyst support (13) over a long period of time by compensating for a decrease in surface pressure due to deterioration of the retaining mat (14) with an increase in the surface pressure due to sufficient expansion of the retaining mat (14). Moreover, since it is unnecessary to strongly compress the retaining mat (14) when assembling so as to enhance the surface pressure, there is no possibility that the catalyst support (13) will be damaged by excessive surface pressure.

An exhaust gas purification device is disposed in an exhaust passage of an engine disposed in an engine room defined in a hull, and is configured to remove at least a nitrogen oxide from an exhaust gas discharged from the engine. The exhaust gas purification device includes: a catalytic part including a selective reducing catalyst for selectively reducing the nitrogen oxide; a reducing agent addition device configured to add a reducing agent to the exhaust gas on an upstream side of the catalytic part in a flow direction of the exhaust gas; and a casing configured to contain the catalytic part. At least a part of the casing is disposed inside the engine room.

A single-piece tubular shell for an exhaust device includes a first peripheral wall portion, a second peripheral wall portion, and a third peripheral wall portion. The first peripheral wall portion at least partially defines a first interior region having a first longitudinal axis extending therethrough. The second peripheral wall portion at least partially defines a second interior region having a second longitudinal axis extending therethrough. The second longitudinal axis is non-coaxially aligned with the first longitudinal axis. The third peripheral wall portion extends between and connects the first peripheral wall portion and the second peripheral wall portion such that the first interior region and the second interior region are in fluid communication. The first peripheral wall portion, the second peripheral wall portion, and the third peripheral wall portion are integrally formed and define an uninterrupted, smooth shell inner surface.

A vehicle exhaust system and method of minimizing a leaked mass flow comprising an exhaust component defining a central axis and having an inner surface and an outer surface, such that the inner surface defines a primary exhaust gas flow path extending along the central axis from an inlet to an outlet, and a surface component having a hood spaced from the exhaust component to define a reservoir having a reservoir volume (V), the reservoir comprising a reservoir inlet fluidly coupled to the primary exhaust gas flow path and defining an inlet area (A), and a reservoir outlet fluidly coupled to an outside environment. The reservoir volume and inlet area having a defined relationship. The reservoir volume and a mass flow through the inlet area having a defined relationship.

An aftertreatment component includes an inlet connector tube, an outlet connector tube, a chamber, a flow dissipater, and a substrate. The inlet connector tube receives exhaust gasses. The chamber is between the inlet connector tube and the outlet connector tube. The flow dissipater is positioned around the inlet connector tube and within the chamber. The flow dissipater receives the exhaust gasses from the inlet connector tube and includes a plurality of perforations. The plurality of perforations defines an open area of the flow dissipater. The open area of the flow dissipater is greatest proximate to the inlet connector tube and progressively decreasing proximate to the outlet connector tube. The substrate is positioned within the chamber and receives the exhaust gasses from the flow dissipater and provides the treated exhaust gasses to the outlet connector tube. The exhaust gases are expelled through the flow dissipater via the plurality of perforations.

A two-stroke engine exhaust resonator with an exhaust gas catalytic converter comprising an inlet opening, wherein the inlet opening is followed by the first end of a stabilizing tube with a catalytic converter mounted thereon, characterized in that the other end of the stabilizing tube is directed towards the primary reflective surface, the primary reflective surface is followed by the first end of a resonator casing, which is surrounding the stabilizing tube, wherein the resonator casing exceeds at least over a part of the catalytic converter on the stabilizing tube, wherein a resonator outlet opening is arranged in the resonator casing between its first and second end or in the primary reflective surface, and at least a part of the resonator casing surrounding the stabilizing tube is surrounded by a cooler.

The present disclosure provides an exhaust system for an internal combustion engine, the exhaust system comprising a first exhaust pipe, a muffler and a second exhaust pipe, and the muffler is mounted between the first exhaust pipe and the second exhaust pipe, the first exhaust pipe is located upstream of the muffler, and the second exhaust pipe is located downstream of the muffler; the second exhaust pipe comprises a single exhaust pipe, the single exhaust pipe having one end connected to a downstream end of the muffler, and the single exhaust pipe being provided with a plurality of connecting holes; or, the second exhaust pipe comprises the single exhaust pipe and a dual exhaust pipe branch, the single exhaust pipe having one end connected to the downstream end of the muffler and the other end connected to the dual exhaust pipe branch.