Matching Design of Supercharging Systems for FSAE Racing Engine

In this paper, a mechanical supercharger intake system is developed for a 693 mL small twin-cylinder FSAE racing engine. Firstly, the target engine-related boost matching calculation was completed, and the mechanical supercharger was selected by combining the calculation results and simulation analysis, and the centrifugal mechanical supercharger model corresponding to the best matching result was determined. A one-dimensional simulation model of the mechanical supercharged engine was established by using GT-POWER software, and the optimal intake system geometry parameters were determined by multivariable simulation design. The power and fuel economy of the mechanical supercharged engine were significantly improved after the matched design. Compared with the naturally aspirated engine after restriction of flow, the torque is improved at all speed conditions and the 0.1 s throttle step input torque transient response is achieved.