Features of turbocharging and supercharging:

Turbocharging: The amount of exhaust gas determines the boost pressure, and the more exhaust

gases, the better the pressurization effect. We generally say that the speed determines the boost

pressure, mainly because the amount of exhaust gas increases at high speeds, and the essence is 

that the amount of exhaust gas determines the boost pressure. Mechanical supercharging: the 

speed determines the pressurization pressure, the higher the speed, the better the pressurization

effect. Because of this, some cars use dual supercharging. At low speeds, mechanical pressurization 

is used to improve smoothness. At high revs, a turbocharger B38 7636784 11657636784 is used to

increase maximum power.

There are several main reasons why trucks don't use mechanical supercharging:

1. The diesel engine speed of the truck is too low

The diesel engine is characterized by a low working speed, and the rated speed of the high-

horsepower diesel engine like the general tractor is about 1500-2000 rpm. For example, in the 

picture above, the big truck, the engine 2000 rpm to the red line. If the speed is too low, you can't 

get too much boost pressure using mechanical supercharging.

2. The amount of truck exhaust gas is sufficient

The displacement of truck engines is often tens of liters, and the compression ratio of diesel engines 

is large. So don't look at the diesel engine speed is not high, the exhaust gas volume is large enough.

As long as the exhaust gas volume is enough, then the turbocharger will definitely work very hard, 

the boost pressure will be large, and the power improvement effect will be obvious.