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首页> 外文会议>8th Biennial Conference on Engineering Systems Design and Analysis 2006 vol.4 >HIGH-PRESSURE ROTARY PUMP PERFORMANCE IN MULTI-JET COMMON RAIL SYSTEMS
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HIGH-PRESSURE ROTARY PUMP PERFORMANCE IN MULTI-JET COMMON RAIL SYSTEMS

机译：多喷共轨系统中的高压回转泵性能

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摘要

The high-pressure hydraulic circuit of the Multi-jet Common Rail (C.R.) system has thoroughly been investigated in the last few years by researchers of the automotive field. However, shortage of knowledge is still present about the high-pressure pump performance. Hydraulic-mechanical efficiency of the pump is only known as mean value and no published data are available on the Radial-jet compression volumetric efficiency. Due to the fact that part of the pumped fuel is partially expelled by the pressure-control valve and because of the presence of the oil flowing in the cooling and lubrification circuit, the determination of the compression volumetric efficiency seems to be a hard task. In the present paper a detailed description of the Radial-jet performance has been provided. The dependence of the flow rate sucked by the high-pressure pump, on speed and load has been studied and the characteristic curve of the cooling-lubricant circuit has been determined. A special procedure was designed and applied for the experimental evaluation of the fuel leakages from the pumping chambers, so as to allow the calculus of the volumetric efficiency. The actual head-capacity pump curves at different revolution speeds were plotted and compared with the electroinjector flow-requirements so as to allow the evaluation of the efficiency of the pressure-control strategy. Furthermore the pump mechanic-hydraulic efficiency dependence on head and speed was also experimentally assessed.
机译：最近几年，汽车领域的研究人员对Multi-jet共轨（C.R.）系统的高压液压回路进行了彻底的研究。但是，仍然缺乏关于高压泵性能的知识。泵的液力机械效率仅称为平均值，没有关于径向射流压缩容积效率的公开数据。由于泵送的燃料的一部分被压力控制阀部分排出的事实，并且由于在冷却和润滑回路中流动的机油的存在，确定压缩容积效率似乎是一项艰巨的任务。在本文中，已经提供了对径向喷射性能的详细描述。研究了高压泵吸入的流量对速度和负载的依赖性，并确定了冷却润滑回路的特性曲线。设计了一种特殊的程序并将其用于从泵室泄漏燃料的实验评估，以便计算体积效率。绘制了在不同转速下的实际扬程泵流量曲线，并将其与电动喷油器的流量需求进行了比较，从而可以评估压力控制策略的效率。此外，还通过实验评估了泵的机械液压效率对扬程和转速的依赖性。

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