3516C Generator Set Engines Caterpillar


Turbocharger Turbine Temperature Is High

Usage:

3516C LY6
采用此步骤以对涡轮增压器涡轮进口温度高进行故障诊断与排除。

可能原因

  • 诊断代码和事件代码

  • 进排气系统

  • 喷油器

  • 后冷器(如有配备)

  • 附属设备

建议的措施

诊断代码和事件代码

将 Cat(ET)连接到维修工具接头上。 检查有无激活的诊断代码和事件代码。 在继续进行本步骤之前应对出现的任何代码进行故障排除。

进排气系统

检查进气是否受阻和/或有无泄漏。 进气歧管温度提高 1 度,排气温度就会提高大约 3 度。 检查排气歧管与涡轮增压器之间有无泄漏。 检查排气是否受阻。 有关检查进排气系统的更多信息,请参考系统操作/测试和调整手册。

喷油器

供应过量燃油的故障喷油器会提高排气温度。 连接 Cat ET 以确定是否存在喷油器电磁阀的诊断代码。

执行"喷油器电磁阀测试"。 在 Cat ET 上,检查并确认喷油器电磁阀的状态为 "OK(正常)"。

执行"Cylinder Cutout Test(断缸测试)"。 找到缺火气缸并修复故障。

参考故障排除, "喷油器电磁阀 - 测试"。

后冷器(如有配备)

进气歧管压力正常,排气温度高的情况可能是由于后冷器芯的散热片阻塞造成的。

如果应用有后冷器,检查后冷器上有无阻塞。 检查后冷器芯有无堵塞。

附属设备

确保附属设备没有使发动机产生加载减速。

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