Why doesn't the diesel engine have a throttle?

This is determined by the way fuel is burned.

The combustion of diesel engine is compression ignition, and the speed control is directly adjusted by the fuel injection quantity. To make an inappropriate analogy, in the calculation of a*b=ab, only A is changed, but B is not changed.

The speed control of gasoline engine also depends on the fuel injection quantity, but the gasoline engine is ignited, so it is necessary to adjust the intake air quantity to control the fuel injection quantity, that is, first adjust A, and then adjust B according to A, and the throttle is for this purpose.

Of course, it also involves the problem of valve timing, and the expansion is more complicated.

In short, the diesel engine controls the fuel injection by the oil pump, so as to control the speed, while the gasoline engine controls the fuel injection quantity by the intake, so the control strategies are different. It's even more complicated when it comes to * * *.

Of course, diesel engines also have throttles, but their names and uses are different.