一、发电机组燃料的系统不一样
1、 The fuel system of the generator set is different
燃油发电机组恐怕只要一个油箱加上一个油泵就可以把燃料送入到发动机里去燃烧，天然气发电机组就不是同了，他们要考虑到安全性，进燃料系统包括电磁阀、燃气混合器、阻火器等。
A fuel generator set may only need a fuel tank and an oil pump to send fuel into the engine for combustion, while a natural gas generator set is different. They need to consider safety, and the fuel system includes solenoid valves, gas mixers, flame arresters, etc.
二、发电机组燃烧方式不一样
2、 The combustion method of the generator set is different
燃油是压燃着火做功，天然气发电机组是靠高压线圈，火花塞点火燃烧做功也就是着火不同，但是天然气发电机组是通过点火模块，燃油发电机组是没有点火模块的。
Fuel is used for compression ignition to do power, while natural gas generator sets rely on high-voltage coils for ignition and combustion, which is different from ignition. However, natural gas generator sets use ignition modules, while fuel generator sets do not have ignition modules.

三、关键部件
3、 Key components
天然气发动机凸轮轴与柴油机线型不同，柴油机气门重叠角是128°，这样可以有较充足的扫气时间可以把气门、气缸、气缸盖这些高温部件的温度降下来，而天然气发动机的气门重叠角是22°，扫气只能通过活塞推出，不能大面积扫气，这也是燃气机排温比柴油机高许多的其中一个原因。
The camshaft of a natural gas engine is different from that of a diesel engine. The overlap angle of the diesel engine valves is 128 °, which allows for sufficient scavenging time to lower the temperature of high-temperature components such as valves, cylinders, and cylinder heads. However, the overlap angle of the natural gas engine valves is 22 °, and scavenging can only be pushed out through the piston and cannot be carried out in a large area. This is also one of the reasons why the exhaust temperature of a gas engine is much higher than that of a diesel engine.
四、关键部件天然气发电机组采用盆型结构有两个原因
4、 There are two reasons why the key component of the natural gas generator set adopts a basin structure
1、可以减小压缩比。天然气发电机组的压缩比不能太大，否则容易爆燃而且天然气发动机没有像柴油机那样要求油和空气在燃烧室内形成气相混合物，所以，它的活塞顶部为平形的而且由于天然气发动机燃烧室温度比柴油机高许多，如果做成各种形状那么边缘、底台以及口缘处会因持续高温而烧坏。
1. You can reduce the compression ratio. The compression ratio of natural gas generator sets should not be too large, otherwise they are prone to detonation. Moreover, natural gas engines do not require the formation of a gas-phase mixture of oil and air in the combustion chamber, as diesel engines do. Therefore, the top of its piston is flat, and since the combustion chamber temperature of natural gas engines is much higher than that of diesel engines, if made into various shapes, the edges, bottoms, and edges will be burned out due to continuous high temperatures.
五、两种发电机组的燃料不一样
5、 The fuel of the two generator sets is different
天然气发电机组主要是烧气体，柴油发电机组主要是燃烧液体状的油，比如柴油、汽油、重油等。这是其中的一点区别。
Natural gas generator sets mainly burn gas, while diesel generator sets mainly burn liquid oil, such as diesel, gasoline, heavy oil, etc. This is one of the differences.