1. The crankshaft rotates during the intake stroke, and the connecting rod drives the piston down, while the intake valve opens.

经空滤器滤清的空气和气体蟒制通过混合器工均匀混合后,被吸入燃气发动机气缸、当活塞到达下止点时，气缸内部充满混合气。

The air and gas filtered by the air filter are evenly mixed through the mixer and then sucked into the gas engine cylinder. When the piston reaches the bottom dead center, the cylinder is filled with mixed gas.

2、压缩冲程 曲轴在飞轮惯性作用下被带动旋转、通过连杆推动活塞由下至点向上止点运动，同时过排气门关闭，混合气被压缩。

2. The compression stroke crankshaft is driven to rotate by the inertia of the flywheel, and the piston is pushed to move from bottom to top dead center through the connecting rod. At the same time, the exhaust valve is closed, and the mixture is compressed.

3、做功冲程 活塞运动至上止点时、火花塞7在点火信号发生器和点火线圈所产生的高压电流作用下产生火花，点燃气缸的可燃气。燃烧时产生的高温高压气体推动燃气发电机组活塞下行，通过连杆带动曲轴旋转，对外作功传递扭矩。

3. When the piston moves to the top dead center during the power stroke, spark plug 7 generates a spark under the action of the high-voltage current generated by the ignition signal generator and ignition coil, igniting the combustible gas in the cylinder. The high-temperature and high-pressure gas generated during combustion drives the piston of the gas generator set downwards, and drives the crankshaft to rotate through the connecting rod, transmitting torque to external work.

4、排气冲程 活塞从下至点往上止点运动此时排气门打开，过气门夫闭。气缸内燃烧后的废气被活塞推出，沿排气道排出气缸外。

4. When the exhaust stroke piston moves from bottom to top dead center, the exhaust valve opens and the valve operator closes. The exhaust gas after combustion in the cylinder is pushed out by the piston and discharged out of the cylinder along the exhaust duct.

燃气发电机组几种常见的燃烧方式：

Several common combustion methods for gas generator sets:

1、燃气发电机组的富燃烧，所谓富燃烧就是燃料多，氧气相对说少一些，但是他的动力足，但由于在缸体内会燃烧不充分，会通过烟管排到外面来。优点是动力十足，燃料温度低，不足之处是一氧化碳排量多，燃料消耗高。

1. The rich combustion of gas generator sets refers to having more fuel and relatively less oxygen, but it has sufficient power. However, due to insufficient combustion in the cylinder, it will be discharged through smoke pipes to the outside. The advantages are full power, low fuel temperature, and the disadvantages are high carbon monoxide emissions and high fuel consumption.

2、燃气发电机组的稀薄燃烧，混合气体中的燃气含量低，燃气燃料与空气之比可达1：25以上的发动机。这种发动机不足就是排放残留过多的氧，损失了动力，但优点是缸体内燃料的燃烧是充分的，并且氮氧化物排放量降低了。

2. The lean combustion of gas generator sets results in low gas content in the mixed gas, and the ratio of gas fuel to air can reach 1:25 or higher in engines. The disadvantage of this type of engine is that it emits excessive residual oxygen and loses power. However, the advantage is that the combustion of fuel in the cylinder is sufficient, and the emission of nitrogen oxides is reduced.

3、燃气发电机组的燃烧方式按化学计量燃烧：指可燃混合气中理论上可完全燃烧的实际含有的燃气量与空气量之比，是表示可燃混合气中燃料量与空气量配合比例的一个参数。当量比大于1，表示可燃混合气中所含实际空气量少于所须的理论空气量，即空气量不足，燃烧效率随燃油当量比增加而下降，反之，当量比小于1，则表示可燃混合气中所含实际空气量超过所必需的理论空气量，即空气量过剩。当量比实际上就是过量空气系数的倒数。这种燃烧氮氧化物的排量高，温度也很高，高的时候可达到700摄氏度。

3. The combustion method of a gas generator set is stoichiometric combustion: it refers to the ratio of the actual amount of gas contained in the theoretically fully combustible mixture to the amount of air, and is a parameter that represents the proportion of fuel to air in the combustible mixture. If the equivalence ratio is greater than 1, it indicates that the actual air content in the combustible mixture is less than the required theoretical air volume, which means that the air volume is insufficient, and the combustion efficiency decreases with the increase of the fuel equivalence ratio. Conversely, if the equivalence ratio is less than 1, it indicates that the actual air content in the combustible mixture exceeds the required theoretical air volume, which means that there is excess air volume. The equivalence ratio is actually the reciprocal of the excess air coefficient. This type of combustion of nitrogen oxides has a high displacement and temperature, reaching 700 degrees Celsius at high temperatures.

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