Design Optimization and Analysis Applying DOE for Intake and Exhaust Pipeline of a Motorcycle

摘要

This paper investigates the effects of intake and exhaust pipeline of a 125 cc single engine motorcycle.The formal design of experiment (DOE) has been utilized to examine the significances of related parameters.Four objective performances established by response surface function include the engine torque (T) of a prescribed range speed,fuel consumption (BSFC),emission of CO and HC.The weighting strategy of multi-objective design optimization for six cases is performed for analysis,comparison,and discussion.A simpler experimental analysis results in a usable guideline for exhaust pipeline arrangement.It shows that the effect of exhaust system is less significant than that of intake section.The engine torque of wide range speed can be enhanced while the fuel consumption can be reduced.The torque of lower range speed can be considerably increased through the optimization strategy presented in this paper.There is no significant polluted emission affected by modifying the intake pipeline system.The proposed integrated process with DOE,optimum design and analysis offers an applicable and convenient engineering development.