The Effects of GDi Fuel Pressure on Fuel Economy
The Effects of GDi Fuel Pressure on Fuel Economy
复制标题
DOI：
10.4271/2014-01-1438
复制
发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
H. Husted;T. D. Spegar;J. G. Spakowski
中科院分区：
文献类型：
--
作者：
H. Husted;T. D. Spegar;J. G. Spakowski
为了满足未来的颗粒物数量法规，正在研究的一种途径是提高直喷系统的燃油压力。在 30 MPa 至 40 MPa 的工作压力下，燃油系统组件的设计必须能够承受这些压力，并且泵需要额外的动力来将燃油加压至比目前使用的标称 15 MPa 至 20 MPa 更高的压力。泵的这种额外动力会影响车辆的燃油经济性，但由于改进的喷雾混合物制备而提高的燃烧效率可能会部分抵消。本文结合测试结果和模拟研究了系统燃油压力增加对燃油经济性的影响。 GDi 泵和气门机构模型已经开发出来，并与现有的泵扭矩测量结果相关联，随后用于预测扭矩的增加以及由于较高的 GDi 系统压力而对燃油经济性产生的相关影响。
To meet future particulate number regulations, one path being investigated is higher fuel pressures for direct injection systems. At operating pressures of 30 MPa to 40 MPa, the fuel system components must be designed to withstand these pressures and additional power is required by the pump to pressurize the fuel to higher pressures than the nominal 15MPa to 20MPa in use today. This additional power to the pump can affect vehicle fuel economy, but may be partially offset by increases in combustion efficiency due to improved spray mixture preparation. This paper examines the impact on fuel economy from increased system fuel pressures from a combination of test results and simulations. A GDi pump and valvetrain model has been developed and correlated to existing pump torque measurements and subsequently used to predict the increase in torque and associated impact on fuel economy due to higher GDi system pressures.