C13, C15, and C18 Generator Set Engines Caterpillar


Engine Cranks but Will Not Start

Usage:

C18 AR3

可能原因

  • 电源

  • 发动机转速 / 正时

  • 单体喷油器

  • 燃油供给

  • 燃烧故障

建议措施

ECM 电源

如果电子维修工具无法与电子控制模块(ECM)通讯,则问题更可能出现在 ECM 的电源上。 请参阅故障诊断与排除, "电源电路 - 测试"。

发动机转速 / 正时

  1. 盘车起动发动机并在电子维修工具的状态屏幕上观察发动机转速。 如果电子维修工具显示转速为 0,请参阅故障诊断与排除, "发动机转速 / 正时电路 - 测试"。

    注: 初始起动盘车时,发动机转速状态可能会指示发动机转速信号异常。 一旦 ECM 能够从信号计算出发动机转速,此信息就会被发动机转速取代。

  1. 确保正时参考齿轮安装正确。 如果齿轮装反,发动机将无法起动。 检查曲轴和凸轮轴驱动齿轮之间的方向是否正确。 如有必要,修正方向并 / 或更换驱动齿轮。 请参阅拆解和组装, "凸轮轴 - 拆卸和安装"。

单体喷油器

在电子维修工具上进行 "Injector Solenoid Test"(喷油器电磁阀测试)以确定是否所有的喷油器电磁阀都可被 ECM 通电激励。 请参阅故障诊断与排除, "喷油器电磁阀电路 - 测试"以了解更多信息。

燃油供给

  1. 检查燃油油位。

  1. 监测起动盘车发动机期间排气有无白烟。

    如果未出现白烟的话,故障可能出在燃油质量或供油上。

  1. 检查燃油压力。 请参阅测试与调整, "燃油系统压力 - 测试"。

  1. 确保燃油系统已充注。 请参阅测试与调整, "燃油系统 - 充注"。

  1. 检查供油管路有无阻塞。

  1. 检查燃油滤清器。

  1. 如果温度低于 0 °C (32 °F),检查燃油有无凝固(结蜡)。

燃烧故障

检查有无燃烧故障

燃烧故障的示例见下表:

  • 外界温度太冷。

  • 机械故障

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