Improvement of Thermal and Mechanic Flow Characteristics in the Intake System of the Piston Engine with Turbocharging

Abstract

Currently the turbocharging is actively used in piston engines to increase their technical and economic indicators. The efficiency of piston engines with turbocharging significantly depends on perfection of processes in the intake and exhaust systems. Results of experimental researches of unsteady gas dynamics and heat transfer in the intake system of the piston engine with a turbocharger are presented in the article. Studies were conducted on full-scale model of the single-cylinder engine with a turbocharger. It is shown that significant pulsations of pressure and flow occur in the intake system of the piston engine during the entire working cycle. The method of stabilization of flows in the intake system due to the controlled discharge of excess air after the turbocharger is proposed. This method will reduce the difference in the cylinders of multi-cylinder engine, reduce noise, increase reliability, and increase the efficiency of the turbocharger.