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    • 25. 发明专利
    • Fuel injection control method of lpi engine, and its device
    • LPI发动机燃油喷射控制方法及其装置
    • JP2005127316A
    • 2005-05-19
    • JP2004263517
    • 2004-09-10
    • Hyundai Motor Co Ltd現代自動車株式会社
    • KANG DAE-JIN
    • F02M21/02F02D19/02F02D41/00F02D41/02F02D41/06F02D41/20F02D41/34F02D45/00
    • F02D19/028F02D19/024F02D19/025F02D19/029F02D41/0027F02D41/062F02D2200/0611F02M21/0212Y02T10/32
    • PROBLEM TO BE SOLVED: To provide a fuel injection control method of an LPI engine capable of improving various performances through optimal fuel injection control such as improvement in startability, improvement in output, improvement in fuel economy, or reduction of harmful exhaust gas, and to provide a fuel injection control device of an LPI engine dispensing with a fuel pressure sensor and fuel temperature sensor for providing an injection control conditions for an engine control unit.
      SOLUTION: The method comprises an engine start confirming step of confirming whether the engine has started or not, a step of calculating the increase amount of the engine speed and fuel temperature when the engine has started, a step of calculating the fuel pressure based on the calculated increase amount of the engine speed and fuel temperature, a step of calculating the propane content in supplied LPG fuel based on the calculated fuel temperature and fuel pressure, and a step of controlling the fuel injection time and injection duration with a map disposed by propane content.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 解决的问题:提供一种LPI发动机的燃料喷射控制方法,其能够通过最佳的燃料喷射控制来提高各种性能,例如提高启动性,提高输出,提高燃油经济性或减少有害废气 并且提供分配有燃料压力传感器和燃料温度传感器的LPI发动机的燃料喷射控制装置,用于为发动机控制单元提供喷射控制条件。 解决方案:该方法包括确认发动机是否起动的发动机起动确认步骤,计算发动机起动时发动机转速和燃料温度上升量的步骤,计算燃料压力的步骤 基于计算出的发动机速度和燃料温度的增加量,基于所计算的燃料温度和燃料压力计算所提供的LPG燃料中的丙烷含量的步骤,以及利用地图控制燃料喷射时间和喷射持续时间的步骤 由丙烷含量处理。 版权所有(C)2005,JPO&NCIPI