1、自然吸气：活塞运动自然吸气。适用范围，单缸机及大多数燃气机

1. Naturally aspirated: piston movement naturally aspirates. Applicable scope, single cylinder engines and most gas engines

2、涡轮增压：利用烟气涡轮增加进气量，强制进气。适用范围：大多数柴油发电机组及部分汽油机。

2. Turbocharging: Using a flue gas turbine to increase the intake volume and force intake. Scope of application: Most diesel generator sets and some gasoline engines.

3、增压中冷：空气中冷器加涡轮增压。

3. Supercharged intercooler: an air intercooler with turbocharging.

沼气发电机组保养和维护相对于柴油机的特别之处：基本的保养和维护都同于相对应柴油机组，下面特别指出燃气机组变动后的特别保养和维护部分：本机组中为了适应天然气或沼气的燃烧有两个主要的改进，一是使天然气或沼气与空气按合适的比例良好混合；二是将混合气及时有效点燃而高效做功。

The special aspects of maintenance and upkeep of biogas generator sets compared to diesel engines are as follows: basic maintenance and upkeep are the same as those of corresponding diesel sets. The special maintenance and upkeep parts after the change of gas sets are specifically pointed out: In this unit, there are two main improvements to adapt to the combustion of natural gas or biogas, one is to mix natural gas or biogas well with air in an appropriate proportion; The second is to ignite the mixture in a timely and effective manner to efficiently perform work.

1、为了保证绝对安全，天然气发电机组机房应远离明火区域；

1. To ensure absolute safety, the natural gas generator room should be kept away from open flame areas;

2、做好室内安装照明、开关、线路及其电器应的防爆措施；

2. Take explosion-proof measures for indoor installation of lighting, switches, circuits, and electrical appliances;

3、完善消防措施，配备灭火器等消防器械；

3. Improve fire protection measures and equip fire extinguishers and other fire-fighting equipment;

4、燃气发电机组机房内安装可燃气体报警装置，可燃天然气发电机组气体泄露时能及时发现。

4. Install combustible gas alarm devices in the gas generator room, which can detect gas leaks in a timely manner when the combustible natural gas generator set is leaking.

5、好选择宽敞、明亮且要求安装换气扇以保证良好的通风，有助机组的使用；

5. Choose spacious, bright and require the installation of ventilation fans to ensure good ventilation, which is helpful for the use of the unit;

6、天然气发电机组安装时底盘与地基应用平垫铁找平，接触面积应在60%以上，且分布均匀。

6. When installing natural gas generator sets, the chassis and foundation should be leveled with flat iron pads, and the contact area should be over 60% and evenly distributed.