1. The difference between diesel engines and gasoline engines lies in the ignition method. In a gasoline engine, gasoline vapor drawn into the cylinder is mixed with air and compressed, and then ignited by a spark plug. In a diesel engine, atomized diesel fuel sprayed by the injector mixes with air, is compressed, and self-ignites as compression raises the temperature of the mixture.

2. Compared with gasoline, diesel provides greater power, has a higher ignition point, and is less volatile. Because of these characteristics, diesel engines are 30% more fuel-efficient than gasoline engines. That is to say, for the same vehicle under the same driving conditions, if a gasoline vehicle consumes 10L of fuel, a diesel vehicle will consume about 7L.

3. The air-fuel mixing method is different. In a typical gasoline engine, the fuel mixes with air outside the cylinder and then enters the cylinder, whereas in a diesel engine, diesel fuel is injected directly into the cylinder to mix with air. The ignition method is also different. A gasoline engine requires a spark plug to ignite the mixture, while a diesel engine relies on compression ignition. Power and torque are also different.

4. The following are the specific differences between diesel engines and gasoline engines: In terms of fuel supply and ignition methods, fuel mixing and combustion in a diesel engine take place inside the cylinder. High-pressure diesel fuel is sprayed directly into the combustion chamber by the injector, where it mixes with air to form an atomized mixture that burns after compression. Therefore, structurally, a gasoline engine has a complete ignition system that a diesel engine does not require.

5. A gasoline engine uses the spark generated by the electronic ignition system to ignite gasoline and achieve combustion. It requires the support of electrical components. Fuel consumption: compared with gasoline, diesel provides greater power, has a higher ignition point, and is less volatile. Because of these characteristics, diesel engines are 30% more fuel-efficient than gasoline engines.

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