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

經空濾器濾清的空氣和氣體蟒制通過混合器工均勻混合后,被吸入燃氣發動機氣缸、當活塞到達下止點時，氣缸內部充滿混合氣。

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、壓縮沖程 曲軸在飛輪慣性作用下被帶動旋轉、通過連桿推動活塞由下至點向上止點運動，同時過排氣門關閉，混合氣被壓縮。

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、做功沖程 活塞運動至上止點時、火花塞7在點火信號發生器和點火線圈所產生的高壓電流作用下產生火花，點燃氣缸的可燃氣。燃燒時產生的高溫高壓氣體推動燃氣發電機組活塞下行，通過連桿帶動曲軸旋轉，對外作功傳遞扭矩。

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、排氣沖程 活塞從下至點往上止點運動此時排氣門打開，過氣門夫閉。氣缸內燃燒后的廢氣被活塞推出，沿排氣道排出氣缸外。

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.

燃氣發電機組幾種常見的燃燒方式：

Several common combustion methods for gas generator sets:

1、燃氣發電機組的富燃燒，所謂富燃燒就是燃料多，氧氣相對說少一些，但是他的動力足，但由于在缸體內會燃燒不充分，會通過煙管排到外面來。優點是動力十足，燃料溫度低，不足之處是一氧化碳排量多，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、燃氣發電機組的稀薄燃燒，混合氣體中的燃氣含量低，燃氣燃料與空氣之比可達1：25以上的發動機。這種發動機不足就是排放殘留過多的氧，損失了動力，但優點是缸體內燃料的燃燒是充分的，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、燃氣發電機組的燃燒方式按化學計量燃燒：指可燃混合氣中理論上可完全燃燒的實際含有的燃氣量與空氣量之比，是表示可燃混合氣中燃料量與空氣量配合比例的一個參數。當量比大于1，表示可燃混合氣中所含實際空氣量少于所須的理論空氣量，即空氣量不足，燃燒效率隨燃油當量比增加而下降，反之，當量比小于1，則表示可燃混合氣中所含實際空氣量超過所必需的理論空氣量，即空氣量過剩。當量比實際上就是過量空氣系數的倒數。這種燃燒氮氧化物的排量高，溫度也很高，高的時候可達到700攝氏度。

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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