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利用进气谐振增加进气量是提高发动机动力性能的有效途径。在实验结果与计算结果对比验证方法可行的基础上,采用数值计算的方法,对并联进气谐振器各参数对单缸发动机充量系数的影响规律进行研究,结果表明:采用谐振器能够使谐振转速附近的充量系数提高2%左右;通过改变谐振腔、谐振管管径及管长等参数就能够改变充量系数最大点的位置,且最大充量系数所对应的转速要比谐振转速高50 r/min;谐振器管的横截面积与进气管有效流通面积相近时可以获得较好的充量系数,谐振器管横截面积过大或者过小都不利于谐振器效果的发挥;谐振器容积过大或者谐振管长度过长都会降低谐振效果。
The use of intake air resonance to increase the intake air volume is an effective way to improve the engine dynamic performance. On the basis of the feasibility of comparing the experimental results with the calculation results, the influence of parameters of the parallel intake air-breathing resonator on the charge coefficient of single-cylinder engine is studied by numerical calculation. The results show that the resonator can make the resonance The charge coefficient near the revolving speed increases about 2%; by changing the resonant cavity, the diameter of the resonant tube and the length of the tube can change the position of the maximum point of the charge coefficient, and the rotational speed corresponding to the maximum charge coefficient is higher than the resonant speed 50 r / min; resonator cross-sectional area and the effective flow area of the intake manifold can get better charge coefficient, the resonator tube cross-sectional area is too large or too small are not conducive to the resonator effect; Resonance If the volume of the device is too large or the length of the resonance tube is too long, the resonance effect will be reduced.