C175-16 Locomotive Engine Caterpillar


Oil Consumption Is Excessive

Usage:

C175-16 3A9

可能原因

  • 机油泄漏

  • 机油消耗量

  • 机油粘度

  • 涡轮增压器密封件

建议的措施

注: 下面以概率的先后顺序列出了这些步骤。 按所列测试步骤中的顺序完成这些步骤。

表 1
故障诊断与排除测试步骤  数值  结果 

1. 检查有无漏油

A. 确定有无外部机油泄漏。

1. 查看曲轴两端的油封是否泄漏。

2. 查看发动机油底壳密封垫和所有润滑系统接头有无渗漏。

3. 查看曲轴箱呼吸器是否泄漏。

注:高曲轴箱压力可导致这些状况。
 

泄漏
 

结果:发动机没有机油泄漏。

转至下一步。

结果:发动机存在机油泄漏。

修理:修理泄漏原因。

如果故障未得到排除,转至下一步骤。
 

2. 检查机油消耗量

A. 确定有无至燃烧区域的泄漏路径。

1. 确定是否存在下述任意状况:

- 在磨损的气门导管和气门杆之间存在泄漏
- 发动机机油回油孔堵塞。
- 活塞或活塞环磨损或损坏。
- 压缩环和/或中间环安装不正确
- 通过涡轮增压器轴中的密封圈泄漏
- 曲轴箱加注过量
- 安装了错误的油位表或导管
- 发动机长时间轻负荷运转

注:发动机机油漏进气缸的燃烧区域会造成排气冒蓝烟。

注:确保正确标定油尺和/或油尺适合具体应用。 标定和/或更换油尺。
 


消耗
 

结果:机油没有漏入燃烧区域。

转至下一步。

结果:机油漏入燃烧区域。

修理:修理机油消耗过大的原因。

如果故障未得到排除,转至下一步骤。
 

3. 检查机油粘度

A. 确保发动机使用正确的发动机机油。

B. 关于应使用的正确发动机机油,请参考操作和保养手册。

注:机油粘度低可能是由燃油漏入曲轴箱或发动机温度升高导致。
 

粘度
 

结果:发动机机油类型正确。

转至下一步。

结果:发动机机油类型不正确。

修理:确定不正确的机油出现在发动机中的原因。
更换发动机机油和发动机机油滤清器

如果故障未得到排除,转至下一步骤。 

4. 检查涡轮增压器轴密封件

A. 确定涡轮增压器轴密封件是否泄漏。

1. 从涡轮增压器上拆卸空气进口管和排气出口管。

2. 检查压缩机叶轮和涡轮有无机油泄漏迹象。

请参阅系统操作/测试和调整, "涡轮增压器检查"。
 

泄漏
 

结果:涡轮增压器不正常

修理:修理或更换涡轮增压器。
 

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