研究结果还表明，进气阻力要比排气阻力对发动机性能的影响大。
The experimental results illustrated that the effects of intake resistance on the engine performance were much more important than that of exhaust.
采用双空滤高位进气方式，有效降低发动机进气阻力和灰尘侵入，提高了发动机的使用寿命。
Using double air filter adopts high intake, effectively reduce the resistance and dust into the engine intake, improving the engine life.
试验证明，该粗滤器具有过滤效率高，进气阻力低，粗滤自动排尘，结构简单，安装方便，成本低的优点。
The test results show the filter has advantages of high filtering efficiency, low intake resistance, automatic dusting, simple structure, convenient installation and low costing.
通过发动机台架试验，研究进气系统阻力对柴油机性能的影响。
Influence of intake resistance on the engine performances based on the engine tests is investigated.
得到D9-220柴油机进气系统和空滤器的最大阻力限值，为进气管路的设计和空滤器的选择提供了依据。
The maximum resistance allowances of the intake system and air filter are gained for the D9-220 engine. This provides a basis for the intake line design and the air filter selection of the engine.
得到D9-220柴油机进气系统和空滤器的最大阻力限值，为进气管路的设计和空滤器的选择提供了依据。
The maximum resistance allowances of the intake system and air filter are gained for the D9-220 engine. This provides a basis for the intake line design and the air filter selection of the engine.
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