The diesel engine uses a compression stroke to compress the mixture of fuel and air to raise the temperature, reach its ignition point and burn to achieve ignition combustion, without the need for a spark plug.
The gasoline engine uses the electronic igniter above the injector to generate an electric spark, which ignites the gasoline to achieve ignition and combustion. Electrical component assistance is required.
Compared with gasoline, diesel has high power, high ignition point and low volatilization. Because of these characteristics, diesel engines are 30% more fuel efficient than gasoline engines. That is to say, the same model, under the same driving conditions, assuming that the fuel consumption of the gasoline car is 10L, then the fuel consumption of the diesel car is about 7L.
The working principle of a diesel engine is not to ignite, but to compress the combustible mixture and allow it to ignite spontaneously when it reaches the ignition point. Then this process is slower than the ignition of the gasoline engine. When the energy is converted into speed, it is slower than the gasoline engine. Therefore, under the same circumstances, the acceleration of the diesel car is slower than that of the gasoline engine.
Because the mechanical working principle of the gasoline engine and the diesel engine are different, the compression ignition mode of the diesel vehicle makes the diesel vehicle to be compressed to a certain extent to generate power, so the sound of the explosion will be relatively large. In actual driving, it can be clearly felt that the noise of the diesel engine is larger than that of the gasoline vehicle.