210 - E-GAS - Electronic Throttle - VolksPage.Net

IntroductionControl processThe engine management system generates aspecific torque according to the external andinternal torque demands.Actual torque is calculated from the followingfactors: engine speed, load signal and ignitionadvance angle.The engine control unit initially compares theactual torque and the specified torque. If thesetwo values differ from one another, the systemdetermines the corrective action necessary tomake these values match.The system pursues two lines of approach simultaneously.Engine control unit1st line of approach2nd line of approachSpecifictorque210_010Air flow rateActualtorqueIgnition,fuel injectionWith the first line of approach, the system activatesthe controlled variables that affect charge.These variables are also known as controlledvariables for long-term torque demand.They are:- throttle valve angle and- charge pressure (turbocharged engines).With the second line of approach, the systemchanges the controlled variables that affectshort-term torque independent of charge.They are:- ignition point,- injection time and- cylinder suppression.On the following pages, we will show you how the electric throttle valve positioning functionworks.6