Did you know?Diesel and gasoline engines are both engines, but they are very different. Want to know what exactly is different between them?I'm going to give you some science.
Clause. First, their fuels are different. Diesel engines use diesel, while gasoline engines use gasoline. Diesel is more energy-dense, so diesel engines are generally more efficient and are suitable for driving heavy vehicles or where large amounts of energy are required. The gasoline engine burns faster because it uses gasoline, which is more suitable for occasions that require higher speed and less load, such as our cars.
Clause. Second, they are also ignited in different ways. The diesel engine is ignited by compression ignition, which means that it does not need a spark plug to ignite the diesel. Gasoline engines, on the other hand, require spark plugs to ignite the gasoline and air mixture. As a result, diesel engines typically have a higher compression ratio than gasoline engines, which ignites diesel at higher temperatures and pressures.
Clause. Third, their speed and noise are also different. The speed of the diesel engine is relatively low, so it is also relatively noisy. If you've ever had the chance to ride in a diesel tractor or a big truck, you'll definitely feel the rumbling sound. Gasoline engines have a wider speed range and are relatively quiet, so they are more suitable for applications that require higher speeds, such as our cars.
Clause. Fourth, the way of spraying is different. Generally, gasoline engines (except direct injection engines) mix gasoline with fuel and enter the cylinder. Whereas, the diesel engine directly injects diesel fuel into the cylinder that is already filled with compressed air;
Clause. Fifth, the compression ratio is different. The compression ratio of the diesel engine is generally larger than that of the gasoline engine, so its expansion ratio and thermal efficiency are relatively high, and the fuel consumption is lower than that of the gasoline engine
Clause. Sixth, the combustion mode is different. The gasoline engine is a pre-mixed flame propagation combustion, and the diesel engine is mainly a diffusion combustion mode;
Clause. 7. The load regulation control elements are different. The gasoline engine regulates the load by controlling the inlet and outlet of the mixture, and the fuel engine relies on the circulating fuel injection volume to adjust the load.
According to the above, although diesel engines and gasoline engines are both engines, they are very different in terms of fuel, ignition method, speed, and noise. Each of them has its own characteristics and uses its own uses. The next time you see a diesel car and a petrol car, you might want to pay attention to the difference