可变进气道发动机性能试验及分析研究  

Research on Performance of Variable Intake System of Motorcycle Engine

作　　者：任立红[1] 舒歌群[2] 张宝欢[1] 宋如钢[1] 

机构地区：[1]天津大学内燃机研究所,天津300072 [2]天津大学内燃机国家重点试验室,天津300072

出　　处：《内燃机工程》2010年第1期7-12,共6页Chinese Internal Combustion Engine Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(20040056023)

摘　　要：针对1台单缸电控4气门发动机进行了可变进气的改进设计，使发动机进气道的流量系数、涡流比、滚流比等流动特性，随着不同的运行工况而变化，从而达到优化发动机中低负荷性能的目的。对可变进气发动机进行的台架性能及排放试验结果表明：随着节气门开度从25％上升到75％，发动机功率提高了4．37％～2．56％，扭矩提高了4．21％～2．56％，燃油消耗率降低了4．89％～2．66％。在中低负荷时，可变进气可以优化发动机的动力和经济性能，但随着负荷的增大，改善的幅度减小。同时，可变进气可使HC、CO排放降低4％～9％，而NOx排放有所上升。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.

关 键 词：内燃机 可变进气 性能 流量系数 涡流比 滚流比 

分 类 号：TK413.4[动力工程及工程热物理—动力机械及工程]