What is the difference between the throttle of a gasoline engine and a diesel engine?

Because of the different fuel characteristics, the throttle control methods of the two engines are completely different.

Before installing EFI system,

The throttle control of gasoline engine is realized by controlling the opening of the throttle (so-called throttle), and at the same time, it also controls the throttle pump in linkage. The throttle valve controls the amount of combustible mixture entering the cylinder, but the concentration of the mixture is controlled by other systems of the carburetor. The working state of carburetor is realized by main oil supply system, idle system, enrichment system, acceleration system and starting system. After realizing electronic control, the throttle of gasoline engine has two control modes; First, the throttle (throttle) is still mechanical, and the control mode is changed to electronic control; Second, the throttle is controlled by a stepping motor. When we pedal, we only control one potentiometer.

The throttle control of diesel engine controls the rotation angle of the plunger of fuel injection pump when it works. According to the structure of the plunger, it also controls the amount of fuel injected into the cylinder, which is different from that of a gasoline engine. The function of governor in high-pressure oil pump is to automatically control different injection curves at different speeds, so as to control the engine speed. After the electronic control is realized, instead of the mechanically controlled high-pressure oil pump, the accelerator pedal pressed by the driver only controls a variable resistor. After the electric signal is transmitted to the engine ECU, all the working instructions are calculated according to the signals fed back by the sensors.