Patent ID: 7043900
Filing Date: 2006-05-16
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. A turbocharged engine control system comprising: an exhaust gas after-treatment system disposed in an exhaust passage configured and arranged to accumulate exhaust particulate matter discharged from an engine; a variable-capacity turbocharger including an exhaust turbine disposed in the exhaust passage having a variable nozzle with an opening degree being variably controlled to change a capacity of the variable-capacity turbocharger; an equivalent surface area estimating section configured and arranged to estimate an equivalent surface area of the exhaust gas after-treatment system which decreases due to an accumulation of the exhaust particle matter in the exhaust gas after-treatment system; and a nozzle opening degree correcting section configured and arranged to correct the opening degree of the variable nozzle to a larger degree in response to a decrease in the equivalent surface area of the exhaust gas after-treatment system that was estimated by the equivalent surface area estimating section.