3500B and 3500C Generator Set Engines Caterpillar


Fuel System Operation

Usage:

3516B GD3



图 1g01095540

燃油系统示意图(典型示例)

燃油供油油路是一种传统设计,用于使用喷油器的发动机。 供油油路使用输油泵将燃油从油箱输送到电子喷油器。 输油泵是一种定量齿轮泵。

来自输油泵的燃油流经燃油滤清器然后进入燃油供油歧管。 燃油充油泵位于燃油滤清器壳体上,用于充注系统。 在以下情况下需要充注燃油系统:

  • 更换燃油滤清器。

  • 排放燃油供油歧管。

  • 排放燃油回油歧管。

  • 更换燃油喷油器。

燃油连续不断地自供油歧管流经喷油器。 燃油会在喷油器的供油口或注油口没有被喷油器体组件柱塞关闭时流过喷油器。 没有喷入气缸的燃油经过回油歧管流回油箱。

回油歧管的端部有一个压力调节阀。 压力调节阀控制整个燃油系统的压力。 这使得喷油器能够被正确加注。

燃油从压力调节阀流出并送往燃油冷却器,燃油冷却器是散热器的一部分。 燃油随后返回燃油箱。

电子控制机械驱动的燃油系统提供了喷油正时的全面电子控制。 改变喷油正时是为了使发动机的性能最佳。

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