Patent ID: 6360541
Filing Date: 2002-03-26
Classification: F02B,F02D,F02M,Y02T

Abstract:
An Exhaust Gas Recirculation (EGR) system for an internal combustion engine comprising:a turbocharger (16) having a variable geometry turbine inlet nozzle (44) receiving exhaust gas from an exhaust manifold (14); an adjustable EGR valve (34) having an inlet connected to receive exhaust gas from the exhaust manifold; a master actuator (50) with first adjusting means connecting to the variable geometry turbine inlet nozzle for adjustment thereof through a range of positions, said master actuator further having a controller (53) receiving a first plurality of turbocharger condition signals (46, 48a-e) and a second plurality of engine condition signals, the controller positioning the first adjusting means responsive to the first and second plurality of signals; and a slave actuator (52) with second adjusting means connecting to the EGR valve for adjustment thereof to at least an open position and a closed position, said slave actuator having a processing means (58) providing a current position signal to the controller of the master actuator and receiving from the controller a desired position signal responsive to the actual position signal and the first and second plurality of signals, the processing means positioning the second adjusting means responsive to the desired position signal.