In one aspect, an aspiration system for a work vehicle includes an exhaust tube extending along a flow direction from an upstream end to a downstream end. The exhaust tube defines an exhaust passage extending from the upstream end of the exhaust tube to the downstream end of the exhaust tube. The exhaust tube includes a venturi portion. The aspiration system also includes an aspiration tube in flow communication with the venturi portion and configured to receive an aspirated airflow. The system further includes a flow adjustment mechanism provided in operative association with venturi portion such that the flow adjustment mechanism is configured to adjust a cross-sectional flow area of the venturi portion of the exhaust tube.

A customized muffler is an apparatus that provides a sportscar-like sound for any exhaust system. The apparatus includes an outer cylindrical shell, a first outer cone, a second outer cone, and at least one sound modifier. The outer cylindrical shell, the first outer cone, and the second outer cone are fixed together and replace an existing muffler. The at least one sound modifier includes an annular disk and a plurality of slots which creates the sportscar-like sound. The first outer cone and the second outer cone also contribute to the sportscar-like sound as a result of the tapering construction of the first outer cone and the second outer cone. The apparatus further customizes the sound of an engine as the apparatus further includes a combination of a first central tube, a second central tube, an air deflector, a third cone, and a fourth cone positioned within the outer cylindrical shell.

An improved catalytic converter includes a Coanda chamber assembly connected upstream of a catalytic reaction chamber, where the exhaust pipe is to be connected to the Coanda chamber assembly. The Coanda chamber assembly forms a Coanda chamber that has at least one narrower section and at least one wider section immediately downstream of the narrower section, with openings formed at the narrowest point of a narrower section. In operation, when engine exhaust gas is fed into the Coanda chamber, the gas pressure increases at the narrower section, and drops when the gas enters the wider section. As a result, air is sucked into the Coanda chamber via the openings and mixes with the exhaust gas. This lowers the exhaust temperature and enhances the efficiency of the catalytic reactions in the catalytic reaction chamber.

An internal combustion engine includes an exhaust conduit having an exhaust port fluidically coupled to ambient fluid and having an internal cross-sectional area and an engine cylinder fluidically coupled to the exhaust conduit. A fluidic amplifier is disposed within the exhaust conduit and is fluidically coupled to the engine cylinder. The amplifier is further fluidically coupled to a source of primary fluid and is configured to introduce the primary fluid and at least a portion of fluid from the engine cylinder to the exhaust port.

A urine water spraying device 20 is provided with: a urine water spraying nozzle 22 for spraying urine water into an exhaust passageway 3 of an engine 2; an assist gas spraying nozzle 23 for spraying an assist gas for promoting atomization of the urine water that has been sprayed by suctioning the urine water sprayed from the urine water spraying nozzle 22 and blowing the urine water into the exhaust passageway 3; and an assist gas supply passageway 27 for supplying the assist gas spraying nozzle 23 with exhaust passing through the exhaust passageway 3 as the assist gas.

A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.

A system for aspirating a pre-cleaner of a work vehicle may include a fluid conduit in flow communication with an outlet port of the pre-cleaner for receiving an aspirated airflow from the pre-cleaner. The system may also include a double-walled flow pipe having an inner tube that receives a primary fluid flow of the work vehicle. The double-walled flow pipe may also include an outer tube surrounding the inner tube such that an annular passage is defined between the inner and outer tubes. The annular passage may be in flow communication with the fluid conduit. When a vacuum is applied to the annular passage, the aspirated airflow may be drawn through the fluid conduit from the pre-cleaner and directed to the annular passage. The aspirated airflow flows through the annular passage as the primary fluid flow is being directed through the inner tube.

In one aspect, an aspiration system for a work vehicle may include an exhaust tube extending defining an exhaust passage therein. The exhaust tube may include a venturi portion, with the exhaust tube further defining an aperture within the venturi portion of the exhaust tube. The system may also include an aspiration tube configured to be coupled between the exhaust tube and a separate component of the work vehicle. The aspiration tube may define an aspiration passage extending between the separate component and the exhaust tube. The aperture defined by the exhaust tube may fluidly couple the aspiration passage and the exhaust passage. Furthermore, the system may include a restrictor body positioned within the exhaust passage. As such, the restrictor body and the venturi portion may be configured to adjust a flow parameter of exhaust gases flowing through the exhaust passage.

An auxiliary exhaust system for an internal combustion generator of a recreational vehicle has an elbow section with a proximal end adapted to be removably attached to an exhaust pipe of a generator and a remote end affixed to a first stack section; a second stack section adapted to be removably attached to a remote end of the first stack section, and a terminal stack section adapted to be removably affixed to a remote end of the second stack section, the stack sections together forming a fluid conduit for exhaust gases; the inlet end of the first stack section having restricted diameter portion to create a venturi effect on gases flowing through the first stack section; wherein the remote end of the elbow section is of smaller diameter than the inlet end of the first stack section and is held in concentric, spaced-apart relation to the inlet end of the first stack section to enable ambient air to be drawn into the inlet end of the first stack section as gases are passed through the auxiliary exhaust system.

Methods and systems are provided for an exhaust gas system. In one example, a system comprises a conical passage fluidly coupling a turbine outlet to an aftertreatment device. The conical passage may further comprise a scavenge valve to adjust exhaust gas flow therethrough.