From the structure of single and double cylinder diesel engine with the same displacement, the single cylinder diesel engine has a simple structure, less components, and does not need to balance the left and right cylinders, so the fault points are less; at the same time, the simple structure determines that the single cylinder diesel engine has the characteristics of simple manufacturing and assembly technology, and low technical difficulty, so the manufacturing cost of single cylinder diesel engine is also low It is easy to use and maintain with good economy. Moreover, the width of the single cylinder diesel engine is narrower than that of the double cylinder diesel engine, which is convenient for realizing the slim shape of the whole vehicle, and ensuring enough wide foot rest position to ensure the driver's riding comfort; the single cylinder diesel engine also makes the whole vehicle light in weight, so it can ensure that the vehicle loaded with the single cylinder diesel engine can turn flexibly and operate stably.

Compared with single cylinder diesel engine, the structure of double cylinder diesel engine is much more complicated. As one cylinder is added, the number of corresponding cylinder, piston, piston ring, connecting rod, piston pin and other parts is doubled. In addition, the structure of special parts such as carburetor, cylinder head, crankshaft and exhaust system is more complex than that of single cylinder diesel engine, which makes the process of double cylinder diesel engine difficult The characteristics of high degree and high technical content also determine that the manufacturing cost of double cylinder diesel engine will be far higher than that of single cylinder diesel engine, and the increase of the number of parts will lead to the increase of fault points of diesel engine. In addition, the balance of left and right cylinders needs to be adjusted, so its use and maintenance are more complex. Of course, the above shortcomings do not mean that the dual cylinder diesel engine is useless. In fact, the dual cylinder diesel engine has incomparable advantages over the single cylinder diesel engine: compared with the single cylinder diesel engine, the displacement of each cylinder of the dual cylinder diesel engine is only half of the former, the diameter of the piston and cylinder is smaller than that of the single cylinder diesel engine, the weight of the crankshaft and flywheel is correspondingly lighter, and the piston line is also relatively light Therefore, even if the piston keeps the same linear speed, the dual cylinder diesel engine can increase the Zui high power of the diesel engine by increasing the speed of the diesel engine.