C11 and C13 Engines and 14M and 16M Motor Graders Caterpillar


Idle Speed Is High

Usage:

16M B9H
如果下列事件代码激活,采用此步骤。 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    
E441(1) 提升怠速来提高蓄电池电压     蓄电池电压低于 24.5 VDC 持续 5 分钟。     发动机转速升高至 1000 rpm。 将会记录该代码。    

可能原因

此条件为正常工作状态。 以下功能之一可能会导致提升怠速:

  • "蓄电池低电压怠速提高"

  • "冷发动机提升怠速:"

使用 Caterpillar ET(Electronic Technician,电子技师)核实发动机没有处于提升怠速状态。 所有状态屏上部都会显示提升怠速。

条件

"蓄电池低电压怠速提高"

如果下列所有情况出现,会将发动机怠速转速提升至 1000 rpm。

  • "低蓄电池提升怠速"启用。

  • 存在有效油门位置。 油门位置开度持续 5 分钟不超过全油门的 25%。

  • 变速箱在空档。

  • 接合停车制动器。

  • 存在有效发动机转速。

  • 系统蓄电池电压保持 24.5 VDC 以下 5 分钟。

"冷发动机提升怠速"

如果下列所有情况出现,会将发动机怠速转速提升至 1000 rpm。

  • "冷发动机提升怠速"启用。

  • 冷却液温度低于 70 °C (158 °F)。

  • 进气歧管温度低于 5 °C (41 °F)。

  • 存在有效油门位置。 油门位置开度持续 5 分钟不超过全油门的 25%。

  • 变速箱在空档。

  • 接合停车制动器。

  • 存在有效发动机转速。

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