Patent ID: 6216459
Filing Date: 2001-04-17
Classification: F02B,F02C,F02D,F02M,Y02T

Abstract:
An exhaust gas re-circulation arrangement in a supercharged internal combustion engine comprising: an exhaust gas turbocharger with an exhaust gas turbine and a compressor, first and second exhaust pipes extending from said engine separately to said exhaust gas turbine, a charge air duct extending from said compressor to said engine, an exhaust gas recirculation line extending from one of said exhaust pipes upstream of said exhaust gas turbine to said charge air duct downstream of said compressor, said exhaust gas turbine having two inlet flow passages, one connected to said first and the other to said second exhaust pipe and including means for causing different exhaust gas flow volumes to pass through said inlet flow passages, said turbine further having a variable geometry for changing the relative flow volumes to pass through said inlet flow passages, and a control arrangement for controlling the exhaust gas flows to provide a pressure in said exhaust gas re-circulation line, which is higher than the pressure of the charge air in said charge air duct downstream of said compressor.