瓦斯发动机组排气中的蓝烟主要是机油过量窜入燃烧室参与燃烧的结果。因此，凡是导致机油窜入燃烧室的原因都会使排气冒蓝烟。归纳主要有以下原因：

The blue smoke in the exhaust of gas engine unit is mainly the result of excessive oil rushing into the combustion chamber to participate in combustion. Therefore, whatever causes the engine oil to rush into the combustion chamber will make the exhaust smoke blue. The main reasons are as follows:

1．活塞环断

1. The piston ring is broken

2．油环上回油孔被积碳堵塞，失去刮油作用

2. The oil return hole on the oil ring is blocked by carbon deposition and loses the function of oil scraping

3．活塞环开口转到一起，造成机油从活塞环开口上窜

3. The piston ring openings are turned together, causing oil to flee from the piston ring openings

4．活塞环磨损严重或被积碳卡滞在环槽内，失去密封作用

4. The piston ring is seriously worn or stuck in the ring groove by carbon deposition, losing its sealing effect

5．气环上下方向装反，把机油刮入气缸内烧掉

5. Install the air ring in the opposite direction up and down, scrape the oil into the cylinder and burn it

6．活塞环弹力不够，质量不合格

6. The elasticity of piston ring is not enough and the quality is unqualified

7．气门导管油封装配不当或老化失效、失去密封作用

7. The valve guide oil seal is improperly assembled or aging and loses its sealing effect

8．活塞、缸筒严重磨损

8. The piston and cylinder barrel are seriously worn

9.机油加入量过多，使机油飞溅过多，油环来不及刮下缸壁多余的机油等

9. Too much oil is added, which makes the oil splash too much, and the oil ring has no time to scrape off the excess oil on the cylinder wall, etc

排气冒蓝烟必然伴随油消耗增多，有的驾驶员称“烧机油”。机油、燃油消耗比一般为0．5%～0。8%，机油消耗超过此值时排气中将有蓝烟产生。

Blue smoke from exhaust is bound to increase oil consumption. Some drivers call it "burning oil". The consumption ratio of engine oil and fuel is generally 0.5% - 0. 8%, when the oil consumption exceeds this value, there will be blue smoke in the exhaust.

发动机冒蓝烟的故障，一般要通过发动机解体、检查，才能找出原因并确定排除故障的方案。冷机状态排烟发蓝，但机油消耗正常的，与燃料有关，视为正常。发动机排烟一般应在发动机暖机状态时检查，通过发动机低速、中速、高速及加速过程中排烟颜色的变化进行分析。

Generally, the cause of the blue smoke fault of the engine can be found out and the troubleshooting scheme can be determined through the disassembly and inspection of the engine. If the smoke exhaust is blue in the cold state, but the oil consumption is normal, which is related to fuel, it is considered normal. Generally, the smoke exhaust of the engine should be checked when the engine is warm up, and the change of smoke exhaust color during low speed, medium speed, high speed and acceleration of the engine should be analyzed.

此外冷起动时排气冒白烟，发动机暖机后白烟消失应视为正常，若车辆正常运行时仍冒白烟则为故障，应通过观察水箱内冷却水是否不正常消耗，各缸工作是否正常，油水分离器是否水量过多等进行检查和分析，排除故障部位。

In addition, the exhaust emits white smoke during cold start, and the white smoke disappears after the engine warms up. If the vehicle still emits white smoke during normal operation, it is a fault. Check and analyze whether the cooling water in the water tank is abnormally consumed, whether each cylinder works normally, and whether the water separator has too much water, so as to eliminate the fault part.

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