Patent ID: 7110876
Filing Date: 2006-09-19
Classification: F02D,F02M,Y02T

Abstract:
1. An engine control device for controlling an exhaust gas recirculation operation, comprising: a variable-capacity turbo supercharger having an adjustable nozzle for varying an entrance area of an exhaust turbine and operable to change a supercharging pressure in accordance with the opening degree of the adjustable nozzle; an EGR valve for adjusting an exhaust reflow amount of exhaust gas flowing from an exhaust passage to an air intake passage; a supercharging pressure controller for driving the adjustable nozzle to control the supercharging pressure; an EGR controller for driving the EGR valve to control the exhaust gas recirculation operation; and an EGR correction amount calculator for calculating an EGR correction amount that defines an effect of the opening degree variation of the adjustable nozzle on the exhaust gas recirculation operation, wherein the EGR controller performs a feedback control operation on the EGR valve in accordance with a deviation between an EGR control amount corrected by the EGR correction amount and a target EGR control amount.