C27 and C32 Engines for Caterpillar Built Machines Caterpillar


Intake Manifold Air Pressure Is Low

Usage:

992K 880
系统运作描述:

表 1 列出了进气歧管空气压力低的诊断故障代码。

表 1
诊断故障代码    
CDL 代码和描述     产生代码的状况     系统响应    
E1045(2) 进气歧管压力低     该代码指示进气歧管空气压力已降至编程设定的阈值以下。     记录该代码。
发动机功率减额。    

测试步骤 1. 检查有无诊断故障代码

  1. 将 Caterpillar 电子技师(ET)连接到维修工具接头上。

  1. 在执行任何故障排除或清除诊断故障代码前,从发动机 ECM 下载"产品总结报告"。

  1. 检查有无现行或记录的 E583 进气 #1 压差高。

结果:

  • E1045 现行或记录状态 -

    修复: 关于故障排除信息,参考故障排除, "进气阻塞"。

    停止

  • E583 现行或记录状态 - 转至测试步骤 2。

测试步骤 2. 检查空气滤清器有无阻塞

  1. 肉眼检查空气滤清器滤芯有无阻塞。 检查并确认空气滤清器壳体处于良好状态。 确保任何壳体损坏不会导致空气进口处的空气阻塞。

  1. 肉眼检查空气滤清器壳体和涡轮增压器之间的进口管路。 检查此管路有无可能造成阻塞的凹痕和损坏。

预期结果:

空气滤清器清洁且空气进口未阻塞。

结果:

  • 正常 - 空气滤清器正常且进口未阻塞。 转至测试步骤 3。

  • - 发现阻塞的滤清器滤芯。

    修复: 清洁或更换滤清器滤芯。 修理发现的进口阻塞。 确认故障已得到排除。

    停止

测试步骤 3. 检查空气管路和连接




    图 1g02068395

    进气系统管路的橡胶连接器(发动机左视图)

  1. 肉眼检查涡轮增压器压缩机出口到空对空后冷器芯进口的进气系统管路。 另外,检查空对空后冷器出口到发动机进气口的管路。 检查并确认管路处于良好状态且无泄漏。

  1. 拆下发动机每侧上的管路橡胶连接器。 检查连接器有无空气泄漏。 必要时,更换连接器。

预期结果:

管路和橡胶连接器处于良好状态。

结果:

  • 正常 - 管路和橡胶连接器正常。 更换连接器。 确保卡箍紧固。 确认系统无泄漏。 转至测试步骤 4。

  • 异常 - 发现管路故障。

    修复: 更换损坏的管路或软管连接。 确认故障已得到排除。

    停止

测试步骤 4. 检查涡轮增压器

拆下进气连接和到涡轮增压器的排气连接。 确认压缩机叶轮和涡轮盘转动自如。 确认压缩机叶轮和涡轮盘未损坏。

预期结果:

涡轮增压器处于良好状态。

结果:

  • 异常 -

    修复: 更换涡轮增压器。 将发动机重新投入使用。

    停止

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