Control Logic Design and Parameter Calibration of a Variable Nozzle Turbocharger for the Diesel Engine
Abstract：In order to meet the emission legislation and to increase the efficiency of the engine and to enhance dynamic charge response, the control logic of the boost pressure was constructed for the diesel engine in the light - duty truck equipped with variable nozzle turbocharger （VNT）. A boost pressure MAP was looked up by the controller according to engine speed and the fuel oil injec- tion quantity to determine target boost pressure. A control structure combined the open - loop pre - control with the closed -loop PID control was adopted to control the boost pressure, then a basic boost pressure MAP and a pre - control MAP and the PID parameter factor MAP was calibrated through the engine emission test. The practice control test on the engine test bench was conducted. The results show that the setting value of the boost pressure can be effectively tracked by the actual boost pressure of the engine, and control errors are less than 8%.
Keywords：Diesel EngineVariable Nozzle TurbochargerControl logicParameter Calibration
Publication Date：2012-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 34-38,53 )