What are the consequences of a long-term transfer at a speed below 2000?

It will lead to insufficient fuel combustion in the engine, resulting in increased carbon deposition in cylinders, valves and spark plugs. As a result, the valve clearance becomes larger, the ignition efficiency decreases, the fuel consumption increases, and the operation is unstable.

The valve clearance becomes larger, the ignition efficiency decreases, the fuel consumption increases, and the operation is unstable. It seems that there is phlegm in the throat, so it is not pleasant to run naturally.

Engine speed:

The engine speed is related to the number of times of work done per unit time or the effective power of the engine, that is, the effective power of the engine changes with the speed. Therefore, when explaining the effective power of the engine, it is necessary to indicate its corresponding speed at the same time.

It is the most economical and best working condition for the engine to work at 2200 ~ 3500 rpm, and the speed should be kept within this range at ordinary times.