Why do diesel vehicles show throttle maintenance when they have a throttle?

The diesel engine has no throttle, and the speed of the diesel engine is controlled by adjusting the fuel supply. The throttle of a gasoline engine actually controls the mixture, thus controlling the engine. 1 diesel engine has the advantages of large torque and good economic performance. The working process of diesel engine has many similarities with that of gasoline engine, and each working cycle has to go through four strokes: intake, compression, work and exhaust. 2. However, because the fuel used by diesel engine is diesel, its viscosity is higher than that of gasoline and it is not easy to evaporate, but its auto-ignition temperature is lower than that of gasoline. Therefore, the formation and ignition mode of combustible mixture is different from that of gasoline engine. The main difference is that the mixture in the cylinder of diesel engine is compression ignition, not ignition.