Difference Between Diesel Engine and Gasoline Engine

1. Ignition method

Diesel engines use the compression stroke to compress the mixture of fuel and air to increase the temperature, achieve its ignition point and burn to achieve the purpose of ignition and combustion, without the need for spark plugs.

The gasoline engine uses the electronic igniter above the fuel injector to generate an electric spark to ignite the gasoline to achieve the purpose of ignition and combustion. Requires electrical components to assist.

2. Fuel consumption

Compared with gasoline, diesel has higher power, higher ignition point, and less volatility. Because of these characteristics, diesel engines have 30% higher fuel economy than gasoline engines. That is to say, the same model, under the same driving conditions, assumes that the fuel consumption of a gasoline car is 10L, then the fuel consumption of a diesel car is about 7L.

3. Acceleration

The working principle of the diesel engine is not to ignite, but to compress the combustible mixture and let it spontaneously ignite when it reaches the ignition point. Then this process is slower than the ignition of the gasoline engine, and when the energy is converted into speed, it is correspondingly slower than the gasoline engine. Therefore, under the same circumstances, the acceleration of a diesel car is slower than that of a gasoline engine.

4. Noise

Due to the different mechanical working principles of gasoline engines and diesel engines, the compression ignition ignition method of diesel vehicles makes diesel vehicles have to be compressed to a certain extent to generate power, so the explosion sound will be relatively loud. In actual driving, it can be clearly felt that the noise of the diesel car engine is greater than that of the gasoline car.