An exhaust conduit having a wall with an inner surface that at least partially defines a flow channel, a first fin positioned within the flow channel and attached to the inner surface, a second fin positioned within the flow channel and attached to the inner surface such that the first fin is spaced apart from the second fin. A support strip is attached to the inner surface, attached to the first fin at a first location spaced apart from the inner surface, and attached to the second fin at a second location spaced apart from the inner surface.

Methods and systems are provided for an exhaust gas mixer. In one example, a system may include a mixer configured to alter exhaust gas flow.

The device includes an upstream pipe, extending along a first direction, and in which at least one purification member is housed, a first downstream pipe, extending along a second direction, and in which at least one heat exchanger is housed, and a second downstream pipe configured to be connected to an exhaust gas outlet tube. The device also includes an intermediate chamber comprising an exhaust gas inlet communicating with the upstream pipe, downstream from the at least one purification member, a first exhaust gas outlet communicating with the first downstream pipe, and a second exhaust gas outlet communicating with the second downstream pipe. The first direction and the second direction form an angle between them comprised between 0 and 90.

An exhaust gas processing device includes: a manifold configured to change a travelling direction of exhaust gas from a first direction to a second direction; a first catalyst carrier into which the exhaust gas that has been guided from the manifold flows, the first catalyst carrier being configured to purify the exhaust gas that is flowing in the second direction; a heater provided on the upstream of the first catalyst carrier in the flowing direction of the exhaust gas, the heater being configured to heat the exhaust gas that has entered from the manifold; and a case accommodating the first catalyst carrier and the heater, wherein an inlet-side opening portion of the case is inserted into the manifold to a position facing an inlet of the manifold, and the inlet-side opening portion is formed with an inlet-side cut-out portion configured to allow passage of the exhaust gas.

An exhaust gas processing device includes: a manifold configured to change a travelling direction of exhaust gas from a first direction to a second direction; a first catalyst carrier into which the exhaust gas that has been guided from the manifold flows, the first catalyst carrier being configured to purify the exhaust gas that is flowing in the second direction; a heater provided on the upstream of the first catalyst carrier in the flowing direction of the exhaust gas, the heater being configured to heat the exhaust gas that has entered from the manifold; and a case accommodating the first catalyst carrier and the heater, wherein an inlet-side opening portion of the case is inserted into the manifold to a position facing an inlet of the manifold, and the inlet-side opening portion is formed with an inlet-side cut-out portion configured to allow passage of the exhaust gas.

A straddle-type vehicle comprises an engine which generates driving power and emits an exhaust gas; an exhaust device including: a catalyst which cleans the exhaust gas, an inner tube in which the catalyst is disposed and through which the exhaust gas flows, the inner tube extending to a location downstream of the catalyst; and an outer tube which covers an outer peripheral surface of the inner tube in an axial direction of the inner tube, and has a muffling space through which the exhaust gas discharged from the inner tube is flowed to reduce an exhaust noise radiated from the engine; at least one exhaust pipe through which the exhaust gas is led to the catalyst; and a downstream oxygen sensor which detects an oxygen concentration of the exhaust gas after flowing through the catalyst, at a location downstream of the catalyst in the inner tube.

Provided is a catalytic converter to be disposed in a branch portion between an exhaust gas passage that guides exhaust gas from an internal combustion engine to outside and an exhaust gas recirculation passage that recirculates a portion of the exhaust gas from the exhaust gas passage to an intake system of the internal combustion engine. The catalytic converter comprises a catalyst storage case that stores a catalyst, a recirculation pipe that forms the exhaust gas recirculation passage, an abutment portion that makes the catalyst storage case and the recirculation pipe be in surface contact with each other and be arranged in parallel to each other, and a downstream cone that makes the exhaust gas passage and the exhaust gas recirculation passage merge with each other.

A water drainage assembly for an aftertreatment system includes: a tube having an inlet structured to be coupled to an outlet conduit of an aftertreatment system; a drain port extending through the tube; a first baffle disposed in the tube, a first baffle first end attached to an inner surface of the tube at a first location, wherein at least a portion of the first baffle is inclined downwards with respect to gravity; and a second baffle disposed in the tube below the first baffle, a second baffle first end being coupled to the inner surface of the tube at a second location that is opposite to and below the first location, wherein at least a portion of the second baffle is inclined upwards with respect to gravity.

An exhaust gas purification system including an exhaust pipe having a hollow longitudinal portion. The hollow longitudinal portion has an inner surface which defines a cavity, and there is also a plurality of steel rods mounted along a length of the hollow longitudinal portion and inside the cavity. The plurality of steel rods are coated with a slurry of a catalytic composition having a tectosilicate having titanium, one or more raw material having magnetic properties, and an acrylic oil.

An air exhausting device includes a muffler internally divided into a plurality of chambers by a separator, an inlet pipe that couples an exhaust pipe of an engine to the muffler, and an outlet pipe that is a path to discharge an exhaust gas inside the muffler to outside air. The muffler is configured of an expansion chamber to which a downstream end of the inlet pipe opens, and a resonator chamber communicated with only the expansion chamber via a plurality of resonator pipes. Any of or both of lengths and thicknesses of the plurality of resonator pipes are different.