G3600 A4 Engines Caterpillar


Excessive Engine Oil Consumption - Inspect

Usage:

G3612 BB2

发动机机油油位不正确

曲轴箱加注过满会增加发动机机油消耗量。 确保发动机机油油位正确。

当发动机曲轴箱油位处于满油位时,发动机机油消耗率一开始时相对较快。 随着发动机机油油位逐渐下降,机油消耗率相应减少。 如果曲轴箱的机油油位总是保持在满油位,机油消耗率相对较快。

如果发动机配备了发动机机油曲轴箱自动加注系统,应检查该系统设置的油位。 调整系统,以便使发动机机油油位低于满油位。 确保发动机机油供油充足。

外部漏油

检查曲轴各端的密封件是否出现发动机机油泄漏。 查看发动机油底壳密封垫和所有润滑系统接头有无发动机机油泄漏。 查看曲轴箱呼吸器有无发动机机油泄漏。 该泄漏可能是由活塞周围的燃烧气体泄漏引起的。 肮脏的曲轴箱通气装置会造成曲轴箱压力高。 肮脏的曲轴箱通气装置也会导致密封垫和密封渗漏。

按照发动机的操作和维护手册, "曲轴箱漏气 - 测量/记录"来测量曲轴箱漏气。

内部漏油

发动机机油可能会通过多种途径漏入燃烧室:

  • 经由磨损的气门导管和气门杆之间的漏油

  • 磨损或损坏的部件(活塞、活塞环或肮脏的发动机机油油道)

  • 压缩环和/或中间环安装不正确

  • 经由涡轮增压器密封环的漏油

  • 曲轴箱机油加注过满

  • 错误的油尺或导管

内部漏油的迹象包括发动机机油的高消耗、蓝烟和过度爆震。

如果怀疑活塞有问题,应检查气缸压缩。 请参考发动机的操作和保养手册, "缸压 - 测量/记录"。

部件磨损

过度磨损和损坏的发动机部件可能是由下列情况造成的:

  • 发动机机油污染

  • 燃料系统设置不正确

  • 进气中有杂质

低负荷下长期运转

发动机在低怠速或减小负荷下运行时间过长可能引起发动机机油消耗量增加和气缸内积碳。 如果发动机在明显低于额定功率的扭矩下运转,就会发生这种情况。

发动机可以在低负荷下运转。 但是,发动机低负荷运转有条件限制。 有关发动机低负荷运转的信息,请参考发动机的操作和维护手册, "发动机操作"。

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