Title: Research on Performance of Variable Intake System of Motorcycle Engine
Abstract: A variable intake system(VIS) for the electronic controlled single-cylinder four-valve engine was developed,so that the intake air flow characteristics i.e.flow coefficient of intake port,swirl ratio and tumble ratio,etc.can be controlled according to engine operation conditions for optimization of engine performance in low and medium load ranges.The engine performance and emission datas obtained on test bench show that as throttle opening rises from 25%~75%,engine power and torque increase by 4.37%~2.56% and 4.21%~2.56% respectively,and SFC decreases by 4.89%~2.66%,that demonstrates the VIS can improve evidently engine power characteristics and fuel economy at low and medium loads.However,with the load increasing further,the effects of VIS decrease.Besides,VIS also reduces HC and CO emissions by 4%~9%,but adds NOx emission.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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