很多人在驾驶挖掘机的过程中，经常会遇到挖掘机冒烟的情况，常见到的是冒白烟、蓝烟、黑烟。那么如何三种不同烟色的问题呢？我们来检查找出原因。

When driving an excavator, many people often encounter smoke from the excavator. The common smoke is white smoke, blue smoke and black smoke. So how to solve the problem of three different smoke colors? Let's check and find out why.

挖掘机冒白烟

The excavator emits white smoke

气缸进水，这是一个普遍的、压倒性的原因；发动机气缸垫损坏；喷油器雾化不良，气缸压力低。

Cylinder water inflow, which is a common and overwhelming reason; The engine cylinder gasket is damaged; Poor atomization of fuel injector and low cylinder pressure.

检查柴油中是否有水。如果挖掘机启动后短时间冒白烟，这是正常现象。另一方面，挖掘机启动时持续冒白烟，机油不减，挖掘机运行无力，要检查气缸垫片是否损坏，或者检查油嘴。

Check whether there is water in diesel oil. If the excavator emits white smoke for a short time after starting, it is normal. On the other hand, when the excavator starts, it continues to emit white smoke, the oil does not decrease, and the excavator is unable to operate. Check whether the cylinder gasket is damaged or the oil nozzle.

挖掘机冒蓝烟

The excavator emits blue smoke

挖掘机冒蓝烟是机油进入气缸燃烧室燃烧造成的。当挖掘机处于冷态时，气缸上会附着一层机油。发动机启动后，这层机油会燃烧产生少量蓝烟，属于正常现象。但是，一旦蓝烟太多，我们就要好好检查了！

The blue smoke from the excavator is caused by the engine oil entering the cylinder combustion chamber for combustion. When the excavator is cold, a layer of oil will adhere to the cylinder. After the engine is started, this layer of oil will burn and produce a small amount of blue smoke, which is a normal phenomenon. However, once there is too much blue smoke, we should check it carefully!

检查油标是否合适，油位是否过高；检查燃油喷嘴是否雾化不良或损坏；检查活塞环和气缸壁。如果磨损过度，间隙会变大，导致密封不良；检查气门导管端口，看挡油板是否脱落和损坏；

Check whether the oil mark is appropriate and whether the oil level is too high; Check whether the fuel atomization nozzle is damaged; Check piston rings and cylinder walls. If the wear is excessive, the clearance will become larger, resulting in poor sealing; Check the valve guide port to see if the oil baffle falls off and is damaged;

检查气缸是否破裂。如果一个或多个气缸不工作，机油将从活塞和气缸壁之间排出，导致发动机中有机油。

Check whether the cylinder is broken. If one or more cylinders do not work, oil will drain between the piston and the cylinder wall, resulting in oil in the engine.

挖掘机冒黑烟

The excavator emits black smoke

冒黑烟是气缸内柴油燃烧不充分的外在表现。挖掘机启动时有黑烟，但一段时间后黑烟逐渐消失是正常的。如果挖掘机老是冒黑烟，并伴有油耗增加，说明挖掘机出故障了。应该从进气、柴油品质、油嘴三个方面检查。

Black smoke is the external manifestation of insufficient diesel combustion in the cylinder. There is black smoke when the excavator is started, but it is normal that the black smoke gradually disappears after a period of time. If the excavator always emits black smoke and increases fuel consumption, it indicates that the excavator has failed. It should be checked from three aspects: intake, diesel quality and nozzle.

检查进气门间隙是否在合理范围内；检查空气滤芯是否堵塞；检查增压器有无损坏。 长臂挖掘机出租厂家认为以上都会导致进气量不足，造成气压低，导致柴油燃烧不充分，冒黑烟；检查柴油质量，看是否合格；

Check whether the inlet valve clearance is within a reasonable range; Check whether the air filter element is blocked; Check the supercharger for damage. Long arm excavator rental manufacturers believe that the above will lead to insufficient air intake, low air pressure, insufficient diesel combustion and black smoke; Check the quality of diesel oil to see whether it is qualified;

检查柴油泵和喷油嘴是否磨损过度，导致燃烧不充分；如果黑烟只是一会儿，很可能是驾驶员操作油门过猛造成的。

Check whether the diesel pump and fuel injection nozzle are excessively worn, resulting in insufficient combustion; If the black smoke is only for a while, it is likely to be caused by the driver operating the accelerator too hard.

此外挖掘机使用的寿命很大程度上取决于检查和保养是否及时、操作是否得当，出现问题是否及时排除。更多内容的了解就来网站 www.wondgo.com看看吧。

In addition, the service life of the excavator largely depends on whether the inspection and maintenance are timely, whether the operation is proper, and whether the problems are eliminated in time. For more information, please visit www.wondgo.com Check it out. Www. 68mn.