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首页> 外文会议>The Eleventh international Pacific conference on automotive engineering(IPC-11) : Proceedings >A Study on Body Vibration Characteristics of the Fuel Injection Pump of The High-Pressure Type for Diesel Engines
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A Study on Body Vibration Characteristics of the Fuel Injection Pump of The High-Pressure Type for Diesel Engines

机译：柴油机高压燃油喷射泵的车身振动特性研究

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Exhaust gas from diesel engines includes diesel particulate. This air pollution problem must be solved early by from thernstandpoint of environmental preservation. The high-pressure injection for the atomization of fuel particle is veryrneffective to improve combustion. On the other hand, the high-pressure injection increase the vibration of thernfuel-injection pump system. This study investigates the vibration characteristics of the fuel injection pump body of thernhigh-pressure type. Free damping vibration experiments by using an impulse hammer are carried out in order torninvestigate the dynamic characteristics . The natural frequency of each vibration mode by collating them in modernanalysis is obtained from the experiments. On the other hand, a FEM model of an injection pump body is made inrnorder to calculate the natural frequency of each vibration mode in the measurement frequency range from 1000 Hz torn4000 Hz. The FEM model is improved by the collation of the experiment values and the calculation values of naturalrnfrequencies. This FEM model is useful to reproduce the vibration displacements and stresses of the fuel injection pumprnbody of each vibration mode. The vibration characteristics of the fuel injection pump of the high-pressure type arernmade clear by comparing the fuel injection pump body of the low-pressure type. Furthermore, the similar experimentsrnand the FEM calculation are carried out for the body mounted with a bracket. It shows that these results are greatlyrndifferent from the results of the simple body. In case of the body mounted with the bracket, the vibration characteristicsrnof the high-pressure type are greatly different from those of the low-pressure type. One of the reasons owes to thernmounting method between the body and the bracket. The bracket of the high-pressure type is united with the body butrnthat of the low-pressure type is not united the body. In comparison with the vibration modes of the high-pressure type,rnthose of the low-pressure have more mainly appeared in the low frequency region. The FEM calculation results showrnthat the stress concentrates in the camshaft bearing support for either body. The combination of physical models of anrnadvanced engine control system was proposed to obtain sophisticated combustion control in lean boost engines.rnPhysical models of intake, engine thermodynamic, combustion, inertia and transmission were incorporated. Therncontrol of air/fuel ratio, intake valve closing timing in the conditions of high boost and lean mixture, was investigatedrnusing simulations.
机译：柴油发动机的废气包括柴油颗粒。必须从环境保护的角度及早解决这个空气污染问题。用于燃料颗粒雾化的高压喷射对于改善燃烧非常有效。另一方面，高压喷射增加了燃料喷射泵系统的振动。本研究研究了高压型燃油喷射泵体的振动特性。为了研究动力特性，进行了冲击锤自由阻尼振动实验。通过在现代分析中整理它们，可以得到每个振动模式的固有频率。另一方面，使喷射泵主体的FEM模型无序，以计算在1000Hz至4000Hz的测量频率范围内的每种振动模式的固有频率。通过对实验值和自然频率的计算值进行核对，改进了有限元模型。该有限元模型对于再现每种振动模式的燃料喷射泵体的振动位移和应力是有用的。通过比较低压类型的燃料喷射泵主体，可以清楚地了解高压类型的燃料喷射泵的振动特性。此外，对安装有支架的车身进行了类似的实验和有限元计算。结果表明，这些结果与简单主体的结果有很大不同。在主体安装有支架的情况下，高压型的振动特性与低压型的振动特性大不相同。原因之一是由于主体和支架之间的安装方法。高压型的支架与车身是一体的，而低压型的支架则与车身没有一体。与高压类型的振动模式相比，低压的主要出现在低频区域。有限元计算结果表明，应力集中在两个主体的凸轮轴轴承支架上。提出了先进的发动机控制系统物理模型的组合，以实现稀薄增压发动机的复杂燃烧控制。rn引入了进气，发动机热力学，燃烧，惯性和传动的物理模型。通过模拟研究了在高增压和稀薄混合气条件下的空燃比控制，进气门关闭正时。

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