C15 and C18 Petrolem Generator Set Engines Caterpillar


Exhaust Temperature Is High

Usage:

C15 115
使用本程序诊断和排除排气温度高故障,或者在以下事件代码为激活状态时使用本程序。 有关事件代码的信息,请参阅故障诊断与排除, "事件代码列表"。

表 1
事件代码    
代码和描述     产生此代码的状况     系统响应    
E194(2) 排气温度高     ECM(Electronic Control Module,电子控制模块)计算出的排气温度高于触发点温度。     发动机减额。 将会记录该代码。    

该事件激活表明 ECM 计算出高虚拟排气温度。 此温度以进气歧管温度、大气压力和发动机转速为系数,通过工况图计算而来。

高进气歧管空气温度、高海拔作业和高发动机负荷可造成排气温度升至过高,从而损坏排气阀和排气系统的其他部件。

该事件发生时,ECM 对发动机减额以降低排气温度。 这有助于避免排气系统部件损坏。

可能原因

  • 发动机作业条件

  • 后冷器

  • 供至大气压力传感器的电源

建议的措施

发动机作业条件

对此诊断代码进行故障诊断与排除时,应考虑发动机进行高海拔作业。 高海拔作业导致生成此代码。 这是正常的。

可能的情况下与操作员交谈。 确定发动机是否在重负荷下运转。 确保发动机以正确的发动机转速运转。

后冷器

如果经过后冷器的流量受阻,可使进气歧管空气温度升高。 彻底检查后冷器是否堵塞。 确保有充足的空气或冷却液流量经过后冷器。

供至大气压力传感器的电源

如果大气压力传感器由 5 V 电源供电,则传感器输出可能在某一数值附近浮动,该数值作为高海拔条件由 ECM 解读。 ECM 接收错误的海拔数值并使发动机减额。 确保大气压力传感器线束接头存在 5 V 电源。

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