Venturi mixing system for exhaust gas recirculation (EGR)

A venturi mixing system for exhaust gas recirculation (EGR) in an internal combustion engine, comprising:

• a mixing conduit;
• a venturi disposed in the mixing conduit, where the venturi and the mixing conduit form an annular cavity, where the venturi forms a mixing chamber;
• an intake air conduit connected to the venturi;
• a supply conduit connected to the venturi;
• an EGR conduit connected to the annular cavity;
• and
• at least two inset conduits in fluid communication with the annular cavity, where the at least two inset conduits generate at least one turbulent flow location in intake air from the intake air conduit, where the at least two inset conduits extend into the mixing chamber, where the at least two inset conduits each form an end outlet, where each of the at least two inset conduits form at least one side outlet on a downstream side.

A venturi mixing device for exhaust gas recirculation (EGR) in an internal combustion engine, comprising:

• a mixing conduit;
• a venturi disposed in the mixing conduit,
• where the venturi and the mixing conduit form an annular cavity,
• where the venturi forms a mixing chamber,
• where the venturi has an inlet section connected by a throat section to an outlet section,
• where the inlet section forms a venturi inlet, where the inlet section has an inlet length from the throat section to the venturi inlet, where the venturi inlet has a venturi inlet diameter,
• where the throat section has a throat diameter, and
• where the outlet section forms a venturi outlet, where the outlet section has an outlet length from the throat section to the venturi outlet;
• and
• at least two inset conduits in fluid communication with the annular cavity, where the at least two inset conduits generate at least one turbulent flow location in intake air from the venturi inlet, where the at least two inset conduits extend into the mixing chamber, where the at least two inset conduits have an inset diameter, where each of the at least two inset conduits form an end outlet at an offset distance from an axis of the mixing chamber, where each of the end outlets has a guide angle with the axis, and where each of the at least two inset conduits form at least one side outlet on a downstream side.

A method for mixing exhaust gases with intake air in an internal combustion engine, comprising:

• generating a lower pressure region in intake air;
• generating a turbulence field in the lower pressure region with at least two inset conduits;
• and
• directing exhaust gases from an annular cavity into the turbulence field through the at least two inset conduits, wherein the at least two fluid conduits are fluidly communicating with the annular cavity.