Physical and experimental modeling of turbochargers with thermodynamic approach for calculation of virtual sensors

Modeling of turbochargers for calculation of virtual sensors for onboard applications can be obtained by thermodynamic approach. This paper focuses on the identification of a thermodynamic turbocharger model based on isentropic efficiencies by taking the heat transfer from turbine to compressor into account. Partly physical, partly experimental model of a GT1749MV turbocharger is parameterized using engine testbench measurement data under consideration of heat transfer. Summarized eight virtual sensors for the air and exhaust path of turbocharged diesel engine are calculated by presented turbocharger model.