3 . comparing two different engines tested on the dynometer : the hirth2706 equips carburetor system and charge as piston valve , and the hirth3203 equips electronic control fuel injection system and charge as reed valve 3 、对采用活塞阀进气、化油器供油方式的hirth2706发动机与采用簧片阀进气、电控燃油喷射方式的hirth3203发动机进行性能对比台架试验。
4.
The structure and operating principle of an air - charged split - type adjustable shock absorber was described , e non - linear parameterized mathematical model of this shock absorber ' s damping characteristics was established according to fluid mechanics theory and the main structural affection factors to shock absorber ' s damping performance , such as the diameter of piston valve orifice , the diameter of adjustable orifice , the initial volume of gas chamber , the diameter of piston rod , the inner diameter of oil pipe and so on , were analyzed by simulations 摘要通过分析一种分体式充气可调阻尼减振器的结构和工作原理，运用流体力学理论，建立了该减振器阻尼特性的非线性参数化模型，仿真分析了活塞阻尼阀孔径、阻尼调节孔径、气室初始体积、活塞杆直径、油管内径等主要结构参数对减振器阻尼性能的影响，通过试验测试，得到了减振器样件的阻尼特性及其可调范围。
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