如果是顶置发动机，可能是沼气发电机组的气缸磨损、椭圆度、圆柱度造成的。活塞环的弹性降低；同一活塞上活塞环的端部间隙相反；活塞环的字侧应朝上，但应朝下安装；活塞环被积碳卡在环槽中。如果是侧装发动机，推杆的阀座和阀头锥面磨损，排气阀头积碳或烧蚀，造成漏气。

If it is an overhead engine, it may be caused by cylinder wear, ovality and cylindricity. The elasticity of the piston ring is reduced; The end clearance of the piston ring on the same piston is opposite; The word side of the piston ring should be upward, but should be installed downward; The piston ring is stuck in the ring groove by carbon deposit. If the engine is side mounted, the valve seat and valve head cone of the push rod are worn, and the exhaust valve head is carbon deposited or ablated, resulting in air leakage.

气缸体漏气现象:发动机运转时，会发出“吱吱、吱吱”的声音，曲轴箱通风装置冒出浓烟，加速时会抖动。如何诊断发动机哪个气缸漏气:

Air leakage of cylinder block: when the engine is running, it will make a "squeak, squeak" sound, and the crankcase ventilation device will emit smoke, which will shake when accelerating. How to diagnose which cylinder of the engine leaks:

1。分别拆下火花塞，用长鼻油壶从该火花塞孔向活塞周围注油，然后将火花塞安装到火花塞孔内，插上高压阻尼线，起动发动机。如果发动机工作后，“亲吻”的声音消失，就证明漏气了。2.熄火方法:拆下某气缸火花塞的高压阻尼线后，发动机运转时“唰、唰”声消失，说明该气缸漏气。

1。 Remove the spark plugs respectively, fill oil around the piston from the spark plug hole with a long nose oil can, then install the spark plugs into the spark plug hole, plug in the high-voltage damping wire, and start the engine. If the sound of "kissing" disappears after the engine works, it indicates that there is air leakage. 2. Shutdown method: after removing the high-pressure damping wire of the spark plug of a cylinder, the "Shua, Shua" sound disappears when the engine is running, indicating that the cylinder is leaking air.

消除钢瓶泄漏:1.如果活塞环损坏、失去弹性和磨损，应更换。

Eliminate cylinder leakage: 1. If the piston ring is damaged, lost elasticity and worn, it should be replaced.

2.如果活塞环倒置安装，则应重新组装，或者如果活塞环卡在凹槽中，则用三角形刮刀小心地刮掉积碳，然后重新组装，使其在凹槽中自由旋转。

2. If the piston ring is installed upside down, reassemble it, or if the piston ring is stuck in the groove, carefully scrape off the carbon deposit with a triangular scraper, and then reassemble it to make it rotate freely in the groove.

3.检查阀座和阀头的锥面。如果排气阀被烧蚀，更换阀门，并研磨阀门和阀座将其密封。检查3密封时，只要燃烧室充满煤油，3分钟后，用手指轻轻触摸阀杆，看看燃烧室中是否有煤油，然后就可以确定阀门是否漏油。试验后，清洁燃烧室、阀门和阀座，使其清洁。如果阀座松动，请更换。

3. Check the conical surface of valve seat and valve head. If the exhaust valve is ablated, replace the valve and grind the valve and valve seat to seal it. When checking the sealing of 3 #, as long as the combustion chamber is filled with kerosene, touch the valve stem gently with your finger 3 minutes later to see whether there is kerosene in the combustion chamber, and then you can determine whether the valve leaks oil. After the test, clean the combustion chamber, valve and valve seat to make them clean. If the valve seat is loose, replace it.