CG137-08 and CG137-12 Industrial Engines Caterpillar


Power Is Low

Usage:

CG137-08 FPL

可能原因

  • 排气排放传感器标定不正确

  • 空燃比控制不正确

  • 进气阻力

  • 后冷器堵塞

建议的措施

注: 如果症状只在特定操作条件如高怠速或特定发动机工作温度下出现,在这些条件下测试发动机。 在其它状况下对故障现象进行故障诊断与排除可能给出误导的结果。

排气排放传感器标定不正确

发动机操作不稳定或发动机功率损失可能是由氧传感器标定不正确导致。 检查排气排放传感器的标定。

请参阅测试和调整, "空燃比控制 - 调整",了解标定详情。

空燃比不正确

空气/燃料混合气太浓将引起爆震。 确认排放正常。 请参阅系统操作/测试和调整, "空燃比控制 - 调整(氧气反馈)"。

燃料能含量的改变将会改变空/燃比。 获取燃油分析。

燃料供应压力必须足够和稳定。

确保燃油控制阀工作正常。

进气阻力

最高容许的进气阻力是 3.75 kPa (15 in H2O)。 如果阻力高于最大容许阻力,清洁滤清器滤芯或安装新滤清器滤芯。 再次检查阻力。 如果阻力依然太高,检查进气管路有无障碍物。

有关更多信息,请参阅系统操作/测试和调整, "进气阻力和排气阻力 - 测试"。

后冷器

后冷器堵塞会对发动机功率造成不良影响。 检查后冷器压差。 请参阅系统操作 / 测试与调整, "后冷器 - 测试"。 必要时清洁后冷器。 有关详情,请参阅操作和保养手册。

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