Abstract: A mixer assembly for a vehicle exhaust system includes a mixer shell defining an internal cavity, wherein the mixer shell includes an upstream end configured to receive exhaust gases and downstream end. A reactor is positioned within the internal cavity and has a reactor inlet configured to receive injected fluid and a reactor outlet that directs a mixture of exhaust gas and injected fluid into the internal cavity. A flow diverter is associated with the reactor to direct exhaust gas bypassing the reactor to mix with the mixture exiting the reactor outlet prior to exiting the downstream end of the mixer.

Abstract: A mixer assembly for a vehicle exhaust system includes a mixer shell defining an internal cavity and an inlet reactor positioned within the internal cavity. The inlet reactor has a fluid inlet, a first exhaust gas inlet, and a second exhaust gas inlet. An inlet baffle is mounted to an upstream end of the mixer shell. The inlet baffle includes a first opening that directs exhaust gas into the first exhaust gas inlet, a scoop that directs exhaust gas into the second exhaust gas inlet, and a plurality of bypass openings that direct exhaust gas to bypass entry into the inlet reactor.

Abstract: An exemplary vehicle exhaust system includes, among other things, a housing defining a fluid chamber and at least one pressure sensor positioned within the fluid chamber. The housing has a fluid inlet configured to receive fluid from a fluid supply and a fluid outlet. A heater heats fluid supplied from the fluid supply such that heated fluid can be injected into a vehicle exhaust component via the fluid outlet. A controller is configured to receive pressure data from the at least one pressure sensor and to determine optimal timing for dosing of the vehicle exhaust component based on the pressure data.

Abstract: A component for a mixer of a vehicle exhaust system, according to an exemplary aspect of the present disclosure includes, among other things, a doser mount comprising a curved body having a center boss with a doser opening defining a doser axis. The curved body includes at least a first mating surface configured to receive a first mixer shell defined by a first dimension and a second mating surface configured to receive a second mixer shell defined by a second dimension different than the first dimension.

Abstract: An exhaust system includes an exhaust component with a wall having an outer surface and an inner surface that defines an internal exhaust gas flow path. At least one opening is formed in the exhaust component to extend through the wall of the exhaust component from the outer surface to the inner surface. A member is formed from a resistive material and is configured to cover the at least one opening. A diverter is positioned adjacent the at least one opening to block at least a portion of the exhaust gas flow path.

Abstract: A vehicle exhaust system component, according to an exemplary aspect of the present disclosure includes, among other things, a housing defining an internal cavity to receive exhaust gases, at least one first catalyst received within the internal cavity, at least one filter positioned within the internal cavity downstream of the at least one first catalyst, and at least one second catalyst received within the internal cavity downstream of the at least one filter. A mixer has an inlet that receives exhaust gases exiting the at least one filter and an outlet that directs exhaust gases into the at least one second catalyst. One or more of the at least one first catalyst, the at least one second catalyst, and the at least one filter are serviceable.

Abstract: A mixer assembly for a vehicle exhaust system includes a mixer shell defining an internal cavity, wherein the mixer shell includes an upstream end configured to receive exhaust gases and downstream end, and a reactor positioned within the internal cavity. The reactor has a reactor inlet configured to receive injected fluid and a reactor outlet that directs a mixture of exhaust gas and injected fluid into the internal cavity. An inlet baffle is mounted to the upstream end of the mixer shell. The inlet baffle includes at least one opening that directs exhaust gas into at least one exhaust gas inlet to the reactor and a plurality of bypass openings that direct exhaust gas to bypass entry into the reactor. The inlet baffle includes a crowned portion that curves away from the reactor to provide for an increased open area within the internal cavity between the inlet baffle and the reactor.

Abstract: A mixer for a vehicle exhaust gas system includes a mixer housing defining an internal cavity and having a mixer inlet configured to receive exhaust gas and a mixer outlet to direct exhaust gas to downstream exhaust components. A flow device is configured to receive the exhaust gas from the mixer inlet and to facilitate mixing of the exhaust gas and a reductant introduced into the first flow device. The flow device comprises a Venturi body centered on a body center axis, and the Venturi body comprises a body inlet configured to receive the exhaust gas from the mixer inlet and a body outlet configured to provide the exhaust gas to the mixer outlet. The Venturi body also includes a louver extending from an internal surface of the mixer housing to a distal edge that is downstream of the body outlet. An upstream vane is positioned within the Venturi body proximate the body inlet and is coupled to an upstream vane hub that is centered on an upstream vane hub axis.

Abstract: An exhaust system includes a housing having an internal cavity defining an exhaust gas passage extending along an axis, at least one exhaust gas aftertreatment component positioned within the internal cavity, and an inlet cover mounted to the housing to provide an open internal area that is upstream of the internal cavity. The inlet cover has a contoured outer surface that includes an inlet opening and at least one sensor opening that is configured to receive an exhaust gas sensor. An inlet tube is mounted to the inlet cover at the inlet opening. A plate is positioned upstream of the at least one gas aftertreatment component and within the open internal area. The plate has a curved surface with a plurality of openings.

Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a flash-boil doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.

Abstract: An exhaust component assembly for a vehicle exhaust system includes a housing defining an internal cavity configured to receive an exhaust gas after-treatment component. A first chamber is in fluid communication with the internal cavity upstream of the exhaust gas after-treatment component. A first nozzle introduces fluid into the first chamber and a first valve controls flow of the fluid from the first chamber into the internal cavity. A heat source is associated with the first nozzle or first chamber. A second chamber is in fluid communication with the internal cavity upstream of the exhaust gas after-treatment component, and the second chamber is a non-heated chamber. A second nozzle introduces fluid into the second chamber and a second valve controls flow of the fluid from the second chamber into the internal cavity. A controller controls the first and second valves based on at least one predetermined operating condition.

Abstract: A mixer for a vehicle exhaust system includes a mixer housing that defines an interior cavity for engine exhaust gases, and which includes a doser opening formed within a wall of the mixer housing. A cone has a cone inlet opening aligned with the doser opening and a cone outlet into the interior cavity. A diverter has at least one first opening that is open to the interior cavity and a second opening that surrounds the cone outlet. Exhaust flow is directed by the diverter to the cone inlet opening to be mixed with a fluid injected through the doser opening.

Abstract: A heater for a vehicle exhaust system includes a housing defining a fluid chamber, and the housing has a fluid inlet configured to receive fluid from a fluid supply and a fluid outlet. A helical body is positioned within the fluid chamber and a heater is integrated into the helical body to heat fluid supplied from the fluid supply such that heated fluid can be injected into a vehicle exhaust component via the fluid outlet. At least one sensor is integrated into the helical body to measure a fluid characteristic.

Abstract: A mixer for a vehicle exhaust gas system includes a mixer housing defining an internal cavity and having a mixer inlet configured to receive exhaust gas and a mixer outlet to direct exhaust gas to downstream exhaust components. A flow device is configured to receive the exhaust gas from the mixer inlet and to facilitate mixing of the exhaust gas and a reductant introduced into the first flow device. The flow device comprises a Venturi body centered on a body center axis, and the Venturi body comprises a body inlet configured to receive the exhaust gas from the mixer inlet and a body outlet configured to provide the exhaust gas to the mixer outlet. The Venturi body also includes a support flange extending from the body outlet at an offset angle to an internal edge of the mixer housing. An upstream vane is positioned within the Venturi body proximate the body inlet and is coupled to an upstream vane hub that is centered on an upstream vane hub axis.

Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a heated doser unit configured to inject heated reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can. Heating of reducing agent may be selectively applied based on a variety of inputs to a controller.

Abstract: An internal combustion engine system includes a combustion engine configured to produce exhaust gases as a product of a combustion reaction. An exhaust discharge pipe coupled to the internal combustion engine, and an adaptive valve assembly. The adaptive valve assembly is coupled to the exhaust discharge pipe and configured to receive the exhaust gases prior to the exhaust gases reaching the atmosphere. The adaptive valve assembly includes a valve flapper arranged in the passageway and configured to pivot about a flapper pivot axis from a normally-closed position to an opened position.

Abstract: A valve assembly for a vehicle exhaust system includes a rigid mount structure that is configured to be mounted within an exhaust component that defines an exhaust gas passage. The valve assembly further includes a plurality of flexible members that each extend from a first end to a second end. One of the first ends and second ends of the flexible members is fixed to the rigid mount structure and the other of the first ends and second ends is free to move such that the plurality of flexible members creates a variable restriction to flow through the exhaust component that varies in response to a pressure difference upstream and downstream of the plurality of flexible members.

Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.

Abstract: A mixer assembly for a vehicle exhaust system includes an inner wall surface and a flow diverter with a flow directing surface that is spaced apart from the inner wall surface to provide an exhaust gas inlet area. The flow directing surface terminates at a distal end that is spaced apart from the inner wall surface to provide an orifice between the distal end and the inner wall surface through which exhaust gas flow accelerates and is directed to flow along the inner wall surface. A vehicle exhaust component assembly that includes the mixer and a method for mixing injected fluid spray into the mixer are also disclosed.

Abstract: An exhaust system includes an exhaust duct that defines an exhaust gas passage extending along an axis and which has a cross-section extending across the axis. At least one sensor opening in the exhaust duct is configured to receive an exhaust gas sensor. A baffle is positioned within the exhaust gas passage and includes a plurality of guide channels with open cross-sections. Each guide channel extends from a first end facing an inner surface of the exhaust duct to a second end opposite the first end. The guide channels guide exhaust gas from different regions of the cross-section toward the at least one sensor opening.