What is the difference between a single rocker arm and a double rocker arm?

The difference between single rocker arm and double rocker arm of the engine is mainly related to the engine structure. The differences are as follows:
1. In theory, the more rocker arms, the more valves, the better the engine performance. Therefore, in theory, the double rocker arms of the engine are obviously better than the single rocker arm.
2. The double rocker arm is stronger and stronger than the single rocker arm. In fact, the design is appropriate. The strength, stiffness and operating performance of the single and double rocker arm mechanism can meet the operating requirements. As long as the rocker arm structure of any vehicle is damaged in normal use, I have never seen it. The biggest advantage of the rocker car is that it is flexible and suitable for narrow spaces.
3. The body of a single rocker arm is generally longer than that of a double rocker arm. The double rocker boom has two upper and lower beams, which are welded into a frame structure. The single rocker arm is a single beam structure set in the middle. Because the beam is strong enough, the structure strength and stiffness are also very good. The structure of single rocker arm is simple to manufacture, and the deformation correction after welding is relatively easy. The driver has a good vision. Therefore, most wheel loaders use single rocker arm structure at present.