瓦斯發動機組排氣中的藍煙主要是機油過量竄入燃燒室參與燃燒的結果。因此，凡是導致機油竄入燃燒室的原因都會使排氣冒藍煙。歸納主要有以下原因：

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．活塞環斷

1. The piston ring is broken

2．油環上回油孔被積碳堵塞，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．活塞環開口轉到一起，造成機油從活塞環開口上竄

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

4．活塞環磨損嚴重或被積碳卡滯在環槽內，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．氣環上下方向裝反，把機油刮入氣缸內燒掉

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

6．活塞環彈力不夠，質量不合格

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

7．氣門導管油封裝配不當或老化失效、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、缸筒嚴重磨損

8. The piston and cylinder barrel are seriously worn

9.機油加入量過多，使機油飛濺過多，油環來不及刮下缸壁多余的機油等

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

排氣冒藍煙必然伴隨油消耗增多，有的駕駛員稱“燒機油”。機油、燃油消耗比一般為0．5%～0。8%，機油消耗超過此值時排氣中將有藍煙產生。

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.

發動機冒藍煙的故障，一般要通過發動機解體、檢查，才能找出原因并確定排除故障的方案。冷機狀態排煙發藍，但機油消耗正常的，與燃料有關，視為正常。發動機排煙一般應在發動機暖機狀態時檢查，通過發動機低速、中速、高速及加速過程中排煙顏色的變化進行分析。

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.

此外冷起動時排氣冒白煙，發動機暖機后白煙消失應視為正常，若車輛正常運行時仍冒白煙則為故障，應通過觀察水箱內冷卻水是否不正常消耗，各缸工作是否正常，油水分離器是否水量過多等進行檢查和分析，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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