When the excavator is working, its speed is about 2000.

　　The rotation speed is related to the working mode, and the standard operation, crushing and re excavation revolutions are different. The standard general rotation speed is clearly marked on the engine nameplate, for example, the Cummins passing Yanmar is generally 2200 revolutions.

The common excavators are generally high with a small speed of 2200 revolutions, while the large excavators are generally about 1950-2000 revolutions.

The new engine is equipped with EPOS - electronic power optimization system. According to the change of engine load, the power absorbed by the hydraulic pump is automatically adjusted to keep the engine speed near the rated speed, that is, the engine is always running at full power.

　　This not only makes full use of the power of the engine, improves the working efficiency of the excavator, but also prevents the engine from stalling due to overload.