Exhaust gas venturi injector for an exhaust gas recirculation system

An internal combustion engine, the engine includes an engine block defining a plurality of combustion chambers, comprising:

• an exhaust air system in fluid communication with the plurality of combustion chambers, the exhaust air system having an exhaust air conduit;
• an intake air system in fluid communication with the plurality of combustion chambers, the intake air system having an intake air conduit, and an intake air compressing device;
• an EGR system extending between the exhaust air system and the intake air system upstream of the intake air compressing device, the EGR system includes an EGR injector, the EGR injector includes an EGR injector valve, an intermediate portion of intake air conduit, a throat portion positioned coaxially with the intermediate portion of the intake air conduit, the throat portion extends radially inwardly of the intermediate portion of intake air conduit, the throat portion having a predetermined minimum diameter, and an end portion of EGR conduit intersecting the intermediate portion of intake air conduit, the end portion of EGR conduit having an open end positioned coaxially with the intermediate portion of intake air conduit, the end portion of EGR conduit positioned upstream of the throat portion;
• and
• an ECM in communication with the EGR system.

A method of operating an internal combustion engine, without a throttle valve, having an engine block defining a plurality of combustion chambers, an exhaust air system having a exhaust air conduit, an intake air system having an intake air compressing device and an intake air conduit, an EGR system having an EGR injector, and an ECM, comprising:

• producing an exhaust gas in the engine block;
• transporting the exhaust gas from engine block through the exhaust air system;
• transporting a portion of the exhaust gas through the EGR system between the exhaust air system and the intake air system;
• transporting fresh air through the EGR injector, and producing a venturi effect in the EGR injector, the venturi effect draws the exhaust gas in the EGR system into the intake air system upstream of the intake air compressing device.