Patent ID: 6164071
Filing Date: 2000-12-26
Classification: F02B,F02M,Y02T

Abstract:
An internal combustion engine having an intake duct, an exhaust duct, and an exhaust gas recirculation system comprising:an EGR duct guiding an EGR flow of exhaust gas from the exhaust duct to the intake duct;an EGR cooler located in the EGR duct cooling the EGR flow;an EGR compressor located downstream of the EGR cooler pumping the EGR flow through the EGR duct;an independent EGR drive positively driving the EGR compressor; anda controller modulating power delivery to the independent EGR drive to adjustably achieve a desired output of the EGR compressor in response to input signals corresponding to at least one engine operating parameter;wherein said drive is a variable ratio coupling between a crankshaft of the engine and the EGR compressor.