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首页> 外文会议>EAEC European automotive congress >THE INFLUENCE OF WAVE PROCESSES IN THE INTAKE EXHAUST SYSTEM TO THE VOLUMETRIC EFFICIENCY OF ENGINES
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THE INFLUENCE OF WAVE PROCESSES IN THE INTAKE EXHAUST SYSTEM TO THE VOLUMETRIC EFFICIENCY OF ENGINES

机译：波浪工艺在进气排气系统中的影响到发动机的体积效率

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The construction of intake-exhaust system i. e. dinamic phenomena occuring in pipes influence to volumetric efficiency of engines, and thus may also affect the engine power, the preparation of mixture and combustion, environmental characteristics of the engine and fuel efficiency. Within this work it has been presented the research of the influence of system geometry at the single cylinder diesel engine on the volumetric efficiency. It has been observed the wave spreading of the pressure as well as of the gas flow in the ducts. It has been determined which wave parameters have the greatest influence on the degree of the volumetric efficiency. It has been particularly analyzed the quantity of the pressure wave at the moment of intake valve closing and in the period of valve overlap.? During experimental measurements, there was the problem of determining the volumetric efficiency of engine with variable intake / exhaust pipes with standard measurement installations (orifices, or hot wire) due to wave phenomena in pipes. This paper presents the possibility of determining the volumetric efficiency of engine with such an intake / exhaust system. Given the known theoretical corelation of pressure at the end of compression and the volumetric efficiency of engine came to the conclusion that the measurements of pressure at the end of compression can determine the value of the volumetric efficiency of engine. There was a correlation between the volumetric efficiency and pressure at the end of compression for standard engines. After establishing these correlations it is possible to determine the volumetric efficiency at engine with variable intake - exhaust system. The most important characteristics of the flow of low pressure in the intake pipe are the amplitude and angular position of the maximum pressure during the intake phase, namely, the position of maximum pressure in relation to the intake valve closing moment. Wave phenomena in the exhaust system does not significantly influence to volumetric efficiency at engines,and especially when the valve overlap small.
机译：进排气系统i的建设。 e。 DINAMIC现象在管存在的影响到发动机的容积效率，因此也可影响发动机功率，混合物和燃烧，发动机和燃料效率的环境特性的制备。在这项工作中已经提出的系统的几何形状的影响的研究在单缸柴油机的容积效率。已经观察到的波的压力的传播以及在管道中的气体流动的。已经确定这波参数对容积效率程度的影响最大。它已被详细分析的压力波的量在进气门关闭的时刻和在气门重叠期间。？在实验测量，有确定与标准测量装置（喷孔，或热丝）可变进气/排气管的发动机的容积效率，由于在管道波动现象的问题。本文呈现确定发动机的容积效率与这样的进气/排气系统的可能性。鉴于压力已知理论相关性实证在压缩结束和发动机的容积效率来到了结论，即压力压缩结束的测量可确定发动机的容积效率值。有在压缩标准的发动机的端部的容积效率和压力之间的相关性。建立这些相关性之后，有可能确定在与可变进气发动机的容积效率 - 排气系统。低压的进气管中的气流的最重要的特征是在进气相位的幅度和最大压力的角位置，即，相对于进气门关闭时刻的最大压力的位置。在排气系统中波动现象不影响显著到体积效率在发动机，和气门重叠小时尤其如此。

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