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首页> 外文期刊>Environmental Science & Technology >Heavy Duty Diesel Exhaust Particles during Engine Motoring Formed by Lube Oil Consumption
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Heavy Duty Diesel Exhaust Particles during Engine Motoring Formed by Lube Oil Consumption

机译:机油消耗导致发动机运转过程中的重型柴油机排气颗粒

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摘要

This study reports high numbers of exhaust emissions particles during engine motoring. Such particles were observed in the exhaust of two heavy duty vehicles with no diesel particle filter (DPF), driven on speed ramp tests and transient cycles. A significant fraction of these particles was nonvolatile in nature. The number-weighted size distribution peak was below 10 nm when a thermodenuder was used to remove semivolatile material, growing up to 40 nm after semivolatile species condensation. These particles were found to contribute to 9-13% of total particle number emitted over a complete driving cycle. Engine motoring particles originated from lube oil and evidence suggests that these are of heavy organic or organometallic material. Particles of similar characteristics have been observed in the core particle mode during normal fired engine operation. Their size and chemical character has implications primarily on the environmental toxicity of non-DPF diesel and, secondarily, on the performance of catalytic devices and DPFs. Lube oil formulation measures can be taken to reduce the emission of such particles.
机译:这项研究报告了发动机驾驶过程中大量的废气排放颗粒。在不带柴油颗粒过滤器(DPF)的两辆重型车辆的排气中观察到了此类颗粒,这些颗粒是在速度斜坡测试和瞬态循环下驱动的。这些颗粒的很大一部分本质上是非挥发性的。当使用热剥蚀剂去除半挥发性物质时,数量加权的尺寸分布峰低于10 nm,在半挥发性物质冷凝后会增长到40 nm。发现这些颗粒占整个驾驶循环中排放的总颗粒数量的9-13%。发动机驱动颗粒起源于润滑油,证据表明这些颗粒是重有机或有机金属材料。在正常点火的发动机运行过程中,在核心粒子模式下已观察到类似特性的粒子。它们的大小和化学特性主要影响非DPF柴油的环境毒性,其次影响催化装置和DPF的性能。可以采取润滑油配制措施以减少此类颗粒的排放。

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  • 来源
    《Environmental Science & Technology》 |2016年第22期|12504-12511|共8页
  • 作者单位

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, 02044 VTT, Espoo, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, 02044 VTT, Espoo, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

    Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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