THE EFFECTS OF SWIRL AND TUMBLE RATIOS ON THE ENGINE PERFORMANCE OF MOTORBIKES
2 years ago
Authors:
Trương Văn Mến
Publication date:
14 / 09 / 2020
Name of Publishers:
scientific journal Tra Vinh University
Abstract:
Nowadays, motorbikes are still the main and popular transport in Asian countries, especially, in Vietnam. However, the manifold intake systems in motorbikes are usually designed in a simple structure. Hence, it reduces engine performance and increases fuel consumption in motorbikes. The paper presents the study of the improvement of the intake system in a 125cc motorbike engine to enhance air-fuel mixing quality that can increase the engine performance. The study employs the ANSYS software to obtain an optimal intake system through the tumble and swirl ratios in different simulation cases. Besides, a model is also built by Matlab/Simulink to examine the effects of swirl and tumble ratios on engine performance and fuel consumption at various engine speeds. The simulation results show that the modified intake system with an incline angle of 300 has optimal tumble and swirl ratios. Accordingly, power output and torque of the engine with the modified intake system are higher while the fuel consumption is lower than the other cases.