The engine system structure of the generator set is mainly valve distribution structure, crank connecting rod structure and body structure. The engine system is mainly covered in these three structures, namely cooling system, ignition system, fuel supply system, lubrication system and starting system. These five systems are the subdivision of the three structures.

除此之外，其中配气系统还可以进行细分，分成两个不同的结构，分别是直推式和摇臂式，其中直推式结构的组成部分为复杂，通过正气门和气门弹簧进入，经过凸轮轴和正时齿轮进行工作后由排气门排出。发动机系统中支持发动机运转主要是通过四个冲程提供能力，分别是燃烧冲程、排气冲程、压缩冲程和进气冲程，通过四个冲程的交替运作，在循环过程中进行周期性运转，曲柄的运转周期一般为两周。

In addition, the valve system can be subdivided into two different structures, namely direct push type and rocker arm type. The components of direct push structure are the most complex, which enter through the positive valve and valve spring, work through the camshaft and timing gear, and then discharge from the exhaust valve. In the engine system, the engine operation is mainly supported by four strokes, namely combustion stroke, exhaust stroke, compression stroke and intake stroke. Through the alternating operation of the four strokes, the periodic operation is carried out in the cycle process, and the operation cycle of the crank is generally two weeks.

现如今，康明斯发电机组所使用的燃料是汽油和柴油，这两种燃料广泛运用于电动机中，一般电动机分为汽油电动机和柴油电动机，但两者的运作原理没有太大区别。

Nowadays, the fuels used by Cummins generator set are gasoline and diesel. These two fuels are widely used in motors. Generally, motors are divided into gasoline motor and diesel motor, but their operating principles are not very different.

发动机的运转依靠四个冲程，冲程中的活塞运转一个周期，由下方运转到上方，这就是一个冲程的运转，运转的过程中注意排气孔、闭气孔和换气孔的开关，在油缸的汽油进行冲程运动时被吸到上方，需要进行关闭排气孔进行压缩冲程，活塞是冲程中重要的一部分，根据活塞判断冲程的运行。活塞从上方到下方，通过火花塞对气体进行点燃，从而驱动康明斯发电机组的向前运行。

The operation of the engine depends on four strokes. The piston in the stroke runs for one cycle, running from the bottom to the top, which is the operation of one stroke. During the operation, pay attention to the switches of exhaust hole, closed hole and exchange hole. When the gasoline in the oil cylinder is sucked to the top during the stroke movement, it is necessary to close the exhaust hole for compression stroke. The piston is an important part of the stroke, Judge the operation of the stroke according to the piston. From top to bottom, the piston ignites the gas through the spark plug to drive the forward operation of Cummins generator set.

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