Apparatus for driving turbo supercharger

An apparatus for driving a turbo supercharger for an internal combustion engine having at least one combustion chamber, an inlet and an outlet for said at least one combustion chamber, and an exhaust gas conduit having an upstream end connected to said at least one combustion chamber outlet and a downstream end, comprising:

• an exhaust gas turbine having an inlet and an outlet;
• a supercharging compressor connected to said exhaust gas turbine to be driven thereby and having an inlet and an outlet;
• said exhaust gas turbine inlet being connected to said exhaust gas conduit downstream of said at least one combustion chamber outlet so that said exhaust gas turbine is positively driven by the exhaust gas flow in said exhaust gas conduit;
• a downstream portion of said exhaust gas conduit disposed between said exhaust gas turbine and said downstream end of said conduit and having an upstream end connected to said exhaust gas turbine outlet;
• a negative pressure generator in said portion of said exhaust gas conduit downstream of said exhaust gas turbine outlet so that exhaust gas flows through said negative pressure generator;
• a discharger outlet in said negative pressure generator for discharging exhaust gas flowing therethrough to the atmosphere;
• gas accelerating means in said negative pressure generator for accelerating the exhaust gas flow to produce a strong negative pressure;
• a suction chamber in said negative pressure generator communicating with said gas accelerating means so that said gas accelerating means produces a negative pressure in said suction chamber;
• a suction duct having a downstream end connected to said suction chamber and an upstream end connected to said portion of said exhaust gas conduit downstream of said exhaust gas turbine outlet and upstream of said negative pressure generator for sucking exhaust from said exhaust gas turbine outlet through said suction chamber;
• and
• intake air conduit means having a first portion connected to said supercharging compressor inlet and a second portion connected between said supercharging compressor outlet and said at least one combustion chamber inlet, so that said exhaust gas turbine is driven positively by said exhaust gas pressure flowing through said exhaust gas conduit and by said negative pressure generated in said negative pressure generator for driving said supercharging compressor to supercharge intake air to said at least one combustion chamber.