3500C Marine Auxiliary Engines Caterpillar


Engine Stalls at Low RPM

Usage:

3512C 2A2

可能原因

  • 诊断代码

  • 燃油供给

  • 供气

  • 发动机怠速

  • 附属设备

  • 电子单体喷油器

建议的措施

诊断代码

在 CaterpillarET(Electronic Technician,电子技师)上检查有无激活的诊断代码。 在继续进行本程序之前,诊断并排除所有激活的代码。

燃油供给

  1. 目视检查燃油油位。 不可全信燃油表。 如有需要,加注燃油。 如果发动机用尽燃油,则需要排出燃油系统中的空气。 请参阅操作和保养手册。

  1. 确保燃油供给阀(如有配备)处在完全打开位置。

  1. 检查燃油管路有无以下故障:阻塞, 皱缩管路, 挤压管路 和 接头松动。 如果发现燃油管路有故障,则应修理和/或更换管路。

  1. 如果进行以下任何步骤,则应充注燃油系统:

    • 更换燃油滤清器

    • 维护燃油低压供油油路

    • 更换单体喷油器

    注: 燃油低压供油管路上安装的观察孔将会有助于诊断燃油中的空气。 请参阅系统操作/测试和调整。

  1. 检查燃油油箱有无可能会堵塞供油的外物。

  1. 检查燃油滤清器。

  1. 检查柴油是否受污染。 请参阅系统操作/测试和调整。

  1. 低温天气会对燃油特性带来不利影响。 请参阅操作和保养手册,了解有关改善低温运作中燃油特性的信息。

供气

检查进气系统中有无阻塞。 如有配备,核实空气切断阀完全开启。

发动机怠速

检查低发动机怠速的参数(如果适用)。 请参阅故障诊断与排除, "配置参数"。

附属设备

检查所有附属设备有无可能会生成过度的负荷施加在发动机上的故障。 修理或更换所有损坏的部件。

电子单体喷油器

  1. 在 Cat ET 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。

  1. 在 Cat ET 上执行 "Cylinder Cutout Test(断缸测试)",找出任何可能缺火的喷油器。

  1. 如果 CatET 显示有问题,请从可疑气缸上拆下电子单体喷油器,然后安装一只新的电子单体喷油器。 请参阅解体和组装。

  1. 确保修理后故障排除。 如果问题仍然存在,请参阅电路测试故障诊断与排除, "喷油器电磁阀 - 测试"。

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