首页> 外文会议>JSAE/SAE International Powertrains, Fuels and Lubricants Meeting >A New Methodology to Study the Mechanisms of Combustion-Chamber Deposit Formation and the Effects of Engine Parameters on the Quantity and Morphology of Combustion-Chamber Deposits
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A New Methodology to Study the Mechanisms of Combustion-Chamber Deposit Formation and the Effects of Engine Parameters on the Quantity and Morphology of Combustion-Chamber Deposits

机译:一种研究燃烧室沉积地层机制的新方法及发动机参数对燃烧室沉积物数量和形貌的影响

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In this work, a methodology is developed to study engine deposit formation mechanisms. It relies on analyzing the deposit with electron microscopy for morphology and infrared absorption spectroscopy for identifying typical chemical functions. Two lab-scale experiments are used to calibrate these measurement techniques by creating deposits through the two main phases: liquid film and soot deposition. To test this methodology, an optical engine is used to create a library of deposits. Two main deposit morphologies are found: a homogeneous underlayer as well as soot-like agglomerates. The underlayer is attributed to a fuel-film mechanism whereas the latter is attributed to particles formed through the combustion process. The influence of engine parameters, such as injection phasing and cooling temperature, on the quantity and morphology of the deposits is studied. Various substrate materials, such as quartz, sapphire, aluminum, and steel were used on the piston surface to investigate the materials influence on the morphology, the composition, and the quantity of the deposits.
机译:在这项工作中,开发了一种方法来研究发动机沉积地层机制。它依赖于用电子显微镜分析沉积物进行形态学和红外吸收光谱,用于识别典型的化学功能。通过通过两个主要阶段创造沉积物:液膜和烟灰沉积来使用两项实验室规模的实验来校准这些测量技术。为了测试该方法,使用光学引擎来创建存款库。发现了两个主要沉积形态:均匀的底层以及烟灰样附聚物。底层归因于燃料膜机制,而后者归因于通过燃烧过程形成的颗粒。研究了发动机参数,例如注射阶段和冷却温度的影响,对沉积物的数量和形貌进行研究。在活塞表面上使用各种衬底材料,例如石英,蓝宝石,铝和钢,以研究材料对沉积物的形态,组合物和量的影响。

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