Bypass venturi assembly for an exhaust gas recirculation system

A venturi assembly for recirculating exhaust gas in an internal combustion engine, comprising:

• a housing having an outlet, a combustion air inlet and an exhaust gas inlet;
• a venturi nozzle in communication with said combustion air inlet, said venturi nozzle defining a bypass venturi section therein, said venturi nozzle and said housing defining a venturi section therebetween terminating at an induction area, said venturi nozzle having a plurality of through holes in communication with a downstream portion of said exhaust gas venturi section, said induction area adjacent said exhaust gas inlet;
• and
• a bypass valve positioned to open and close said bypass venturi section.

A method of recirculating exhaust gas in an internal combustion engine, comprising the steps of:

• providing a bypass venturi assembly including a housing having a combustion air inlet, an exhaust gas inlet and an outlet, a venturi nozzle in communication with said combustion air inlet, said venturi nozzle defining a bypass venturi section therein, said venturi nozzle and said housing defining an exhaust gas venturi section therebetween terminating at an induction area, said venturi nozzle having a plurality of through holes in communication with a downstream portion of said exhaust gas venturi section;
• transporting combustion air to said combustion air inlet;
• transporting exhaust gas to said exhaust gas inlet and said induction area;
• and
• selectively operating a bypass valve to open and close said bypass venturi section and thereby control an amount of exhaust gas inducted at said induction area.