Impact of turbocharger cooling and lubricating state on the Performance of Turbocharged Engine

Turbocharged is very important for engine emission reduction of road vehicles. The performance of turbocharged engine was strongly affected by heat transfer of turbocharger. The aim of this studyis to evaluate the effect of turbocharger cooling and lubricating state on the performance of turbocharged engine. This work was developed a detailed model that evaluating both engine performance and turbocharger cooling and lubricating state. The simulated model was validated by the experimental data on the turbocharger and engine test bench. Finally, this model has been used to evaluate the engine performance under three different heat transfer conditions. The results showing the mass flow rate of turbocharger cooling water is an important factor for turbocharged engine performance, especially for the temperature of engine exhaust emission.