Exhaust gas recirculation system with variable geometry turbine and bypass venturi assembly

A work machine, comprising:

• a frame;
• and
• an internal combustion engine carried by said frame, including:
• an exhaust manifold;
• a turbocharger including a turbine and a compressor, said turbine having a variable geometry inlet coupled with said exhaust manifold, said compressor having an outlet;
• and
• a bypass venturi assembly, including:
• a housing having an outlet, a combustion air inlet and an exhaust gas inlet, said combustion air inlet coupled with said compressor outlet, said exhaust gas inlet coupled with said exhaust manifold;
• a center piece positioned within said housing and in communication with said combustion air inlet, said center piece defining a combustion air bypass section therein;
• a combustion air bypass valve positioned in association with said combustion air bypass section;
• and
• an exhaust gas valve positioned in association with said exhaust gas inlet.

A method of operating an internal combustion engine, comprising the steps of:

• providing an exhaust manifold and an intake manifold;
• providing a turbocharger including a turbine and a compressor, said turbine having a variable geometry inlet coupled with said exhaust manifold, said compressor having an outlet;
• providing a bypass venturi assembly, including:
• a housing having an outlet, a combustion air inlet and an exhaust gas inlet, said combustion air inlet coupled with said compressor outlet, said exhaust gas inlet coupled with said exhaust manifold;
• a center piece positioned within said housing and in communication with said combustion air inlet, said center piece defining a combustion air bypass section therein;
• a combustion air bypass valve positioned in association with said combustion air bypass section;
• and
• an exhaust gas valve positioned in association with said exhaust gas inlet;
• driving said turbine using exhaust gas from said exhaust manifold;
• compressing combustion air using said compressor;
• mixing compressed combustion air and exhaust gas within said bypass venturi assembly;
• and
• transporting said combustion air and exhaust gas mixture to said intake manifold.