Research on Intake System of Motorcycle Engine to Obtain High Torque at Low and Medium Speed

摘要

The new intake system is designed and the intake pipe is changed in order to get high torque at low and medium speed. Through theory analyses, after the intake parameters are changed, the intake dynamic effect is utilized to increase volumetric efficiency and torque at the low and medium speed. Through further research, it is found that there is a quite great influence for intake pipe length on torque characteristic. Extending intake pipe length can improve engine torque at low and medium speed and the maximum torque point is shifted from right to left on the performance curve.