Vane mixer in engine exhaust system

A vane mixer for an exhaust system in an internal combustion engine comprising:

• a mixer body including an exhaust conduit defining a longitudinal passage axis, and having an outer conduit surface, and an inner conduit surface extending circumferentially around the longitudinal axis to form an exhaust passage extending between an upstream mixer end and a downstream mixer end;
• the mixer body further including an injector mount, and a fluid injection side port formed in the injector mount and defining a transverse port axis forming an acute angle with the longitudinal passage axis;
• and
• a vane extending across the exhaust passage and including a trailing vane edge positioned downstream of the fluid injection side port, and a leading vane edge positioned for impingement by merging flows of exhaust through the exhaust passage and injected fluid through the fluid injection side port in a spray plume path parallel to the transverse port axis;
• the vane dividing the exhaust passage into a major flow area and a minor flow area, and the minor flow area is in overlapping angular alignment, circumferentially around the longitudinal passage axis, with the fluid injection side port.

A vane mixer for an exhaust system in an internal combustion engine comprising:

• a mixer body including an exhaust conduit defining a longitudinal passage axis, and having an outer conduit surface, and an inner conduit surface extending circumferentially around the longitudinal axis to form an exhaust passage extending between an upstream mixer end and a downstream mixer end;
• the mixer body further including a fluid injection side port fluidly connected to the exhaust passage at a location longitudinally between the upstream mixer end and the downstream mixer end, and defining a transverse port axis intersecting the longitudinal passage axis and forming an acute angle with the longitudinal passage axis;
• and
• a vane extending across the exhaust passage and including a trailing vane edge positioned downstream of the fluid injection side port, and a leading vane edge, and a clearance extends, in a longitudinal direction parallel to the longitudinal passage axis, between the transverse port axis and the leading vane edge.