Modeling and Analysis of a Turbocharged Diesel Engine with Variable Geometry Compressor System 2011-24-0123
In order to increase the efficiency of automotive turbochargers at low speed without compromising the performance at maximum boost conditions, variable geometry compressor (VGC) systems, based on either variable inlet guide vanes or variable geometry diffusers, have been recently considered as a future design option for automotive turbochargers.
This work presents a modeling, analysis and optimization study for a Diesel engine equipped with a variable geometry compressor that help understand the potentials of such technology and develop control algorithms for the VGC systems,.
A cycle-averaged engine system model, validated on experimental data, is used to predict the most important variables characterizing the intake and exhaust systems (i.e., mass flow rates, pressures, temperatures) and engine performance (i.e., torque, BMEP, volumetric efficiency), in steady-state and transient conditions. The model is used to explore the engine system sensitivity to the VGC control input; in particular, its effect on the engine performance and compressor stability is evaluated. A preliminary optimization for steady-state (open-loop) control of the VGC system is then proposed.
Citation: Canova, M., Taburri, M., Fiorentini, L., Chiara, F. et al., "Modeling and Analysis of a Turbocharged Diesel Engine with Variable Geometry Compressor System," SAE Int. J. Engines 4(2):2405-2417, 2011, https://doi.org/10.4271/2011-24-0123. Download Citation
Marcello Canova, Massimiliano Taburri, Lisa Fiorentini, Fabio Chiara, Yue-Yun Wang
Center For Automotive Research, University of Parma, Ohio State University, OSU Center for Automotive Research, General Motors
10th International Conference on Engines & Vehicles
SAE International Journal of Engines-V120-3, SAE International Journal of Engines-V120-3EJ