Crankcase Pressure (High)
使用本步骤以诊断和排除曲轴箱压力高故障，或者在下列任一事件代码为激活状态时使用本步骤。 有关事件代码和这些代码的默认触发点的信息，请参阅 故障诊断与排除, "事件代码列表"。
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| 事件代码 | ||
|---|---|---|
| 代码和描述 | 产生此代码的状况 | 系统响应 |
| E012（2）曲轴箱压力过高减额 | 发动机曲轴箱压力高于触发点压力并持续延迟时间。 | 记录该代码。 |
| E013（3）曲轴箱压力过高关停 | 记录该代码。 发动机将停机。 | |
| E101（1）曲轴箱压力过高警告 | 记录该代码。 | |
| E101（2）曲轴箱压力过高减额 | 发动机将减额。 记录该代码。 | |
| E101（3）曲轴箱压力过高关停 | 发动机将停机。 记录该代码。 | |
可能原因
- 发动机部件磨损
- 曲轴箱呼吸器堵塞
建议的措施
发动机部件
活塞或活塞环损坏可造成曲轴箱压力过高。 这种状况会导致发动机运转不平稳。 从曲轴箱通气装置冒出的烟雾（窜气）量也会高于正常水平。 此通气装置就可能在短时间内阻塞，造成正常情况下不该漏油的密封垫和密封件出现漏油。 曲轴箱窜气也可能因磨损的气门导管或损坏的涡轮增压器密封而导致的。
曲轴箱呼吸器
曲轴箱通气装置堵塞将引起曲轴箱压力过大。 曲轴密封泄漏可能发生。 活塞环的密封件可能损失，使曲轴箱漏气，并进一步增加曲轴箱压力。
8T-270 0曲轴箱窜气量/空气流量指示仪 可检查窜气量。 有关检查曲轴箱窜气量的测试程序，请参阅专门说明书, SEHS8712, " 8T-2700 曲轴箱窜气量/空气流量指示仪 的使用"。
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