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Experimental investigation of the behavior of non-esterified rapeseed oil in a diesel engine mechanical fuel injection system

机译：柴油机机械燃油喷射系统中非酯化菜籽油性能的实验研究

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摘要

The study investigates the effects of non-esterified rapeseed oil, a commonly used liquid first-generation renewable bio-fuel utilized in existing compression ignition engines, on the behavior of the fuel in the high-pressure diesel fuel injection system with a traditional mechanically controlled fuel injection pump. The experiments were carried on a Zetor tractor engine powered by diesel fuel, biodiesel and heated fuel-grade rapeseed oil, instrumented with direct and low-cost indirect fuel injection line pressure sensors. The order-of-magnitude higher viscosity, higher bulk modulus, and higher density of rapeseed oil compared to diesel fuel were found to have measurable effects on the fuel delivery timing, fuel pressure, load on the fuel injection pump, and maximum fuel delivery rates. The low-cost clamp-on pressure sensors provided a good quantitative information about the injection timing but only a qualitative information about the absolute pressure. With rapeseed oil, the load on the fuel injection pump was slightly increased, and the rapeseed oil was delivered earlier and at higher pressures, counteracting the poorer atomization and increased combustion delay, with differences between heated rapeseed oil and diesel fuel decreasing with increasing fuel temperature, but subject to diminishing returns. The fuel temperatures at the injector were markedly higher than at the injection pump inlet at higher engine load, and lower at lower loads. Looping fuel return line to the fuel filter inlet accelerated the warm-up of the fuel. Heating of the fuel past about 55℃ and additional electric heating of the high-pressure injection lines had no marked effects on combustion timing or exhaust emissions.
机译：这项研究调查了非酯化菜籽油（一种用于现有压燃式发动机的常用液体第一代可再生生物燃料）对采用传统机械控制的高压柴油机喷射系统中燃料行为的影响。燃油喷射泵。实验是在装有柴油，生物柴油和加热的燃油级菜籽油的Zetor拖拉机发动机上进行的，该发动机配有直接和低成本的间接燃油喷射管路压力传感器。发现与柴油燃料相比，数量级更高的粘度，更高的体积模量和更高的菜籽油密度对燃料输送正时，燃料压力，燃料喷射泵上的负载以及最大燃料输送率具有可测量的影响。低成本的夹持式压力传感器提供了有关喷射正时的良好定量信息，但仅提供了有关绝对压力的定性信息。使用菜籽油时，燃油喷射泵上的负载略有增加，并且较早地以较高压力输送菜籽油，从而抵消了较差的雾化和增加的燃烧延迟，随着温度升高，菜籽油和柴油燃料之间的差异减小，但收益会递减。在较高的发动机负载下，喷油器处的燃油温度明显高于在喷油泵进口处，而在较低的负载下则较低。通往燃油滤清器进口的燃油返回管路的循环加速了燃油的预热。燃料加热到约55℃以上，高压喷射管路的额外电加热对燃烧正时或废气排放没有明显影响。

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  • 来源
    《Fuel》 |2012年第2012期|p.157-165|共9页
  • 作者

    Michal Vojtisek-Lom; Martin Pechout; Alexander Barbolla;

  • 作者单位

    Department of Vehicles and Engines, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic;

    Department of Vehicles and Engines, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic;

    Department of Vehicles and Engines, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    injection timing; vegetable oil; injection pressures; biofuel; fuel temperature;

    机译：注射时间植物油;注射压力生物燃料燃油温度;

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