What is the difference between diesel engine and gasoline engine which is better

Some people say that foreign diesel cars are good, and domestic gasoline cars are good. What is the difference between a diesel engine and a gasoline engine? In the end, what's the difference? Today Xiaobian talks about diesel engines and gasoline engines!

The difference between a gasoline engine and a diesel engine is as follows

Pros and Cons of Gasoline Engines

Gasoline engines are gasoline-fueled engines that convert internal energy into kinetic energy. Due to the small viscosity and rapid evaporation of gasoline, petrol injection system can be used to inject gasoline into the cylinder. After compression reaches a certain temperature and pressure, the spark plug ignites the gas to expand the work.

advantage:

First of all, the price of gasoline is relatively cheap, and maintenance is convenient. Gasoline version of RV replacement parts is much easier than a diesel engine. The speed of the gasoline engine is high (the speed of gasoline engines currently used for trucks is generally 3000-4000R/MIN, and the maximum speed of gasoline engines for cars can reach 5000-6000R/MIN). The adaptability is good, the work is smooth and gentle, the operation is convenient and labor-saving, and the quality is light. With its low noise, low cost, and easy start-up, it is widely used in cars, small and medium sized goods vehicles and military off-road vehicles.

Disadvantages:

The fuel consumption rate is high, the economy is poor, and the exhaust purification index is low. Since gasoline-powered vehicles such as passenger cars and passenger cars often travel in the city, road congestion often stops in the open state, and the engine is often idle at low temperatures. Even under normal operating conditions, the temperature and pressure of gasoline engines are lower than those of diesel engines. Therefore, under the operating conditions of the gasoline engine, the engine oil is likely to produce low-temperature sludge, so the gasoline engine oil is required to have a good low-temperature sludge dispersion.

Pros and cons of diesel engines

A diesel engine is an engine that burns diesel fuel for energy release. It was invented by the German inventor Rudolf Diesell in 1892. To commemorate this inventor, diesel was represented by his last name Diesel, and the diesel engine was also called the diesel engine.

advantage:

1, long life and economical and durable. The low speed of the diesel engine, the related parts and components are not easy to age, the parts wear less than the gasoline engine, and the service life is relatively long. There is no ignition system and there are few auxiliary appliances, so the failure rate of the diesel engine is much lower than that of the gasoline engine.

2, high security. Compared with gasoline, it is less volatile, has a higher ignition point, and is not easily ignited or exploded due to accidental use. Therefore, the use of diesel is more stable and safer than the use of gasoline.

3, low speed and high torque. Diesel engines usually get very high torque at very low speeds, which is better than gasoline engines on complex roads, climbs, and loads. However, they did not perform as quickly as high-speed roads and high-speed roads.

Disadvantages:

1. The diesel engine's ignition method adopts a compression ignition type. Compared to a gasoline vehicle, it does not have a spark plug structure. Sometimes, due to oxygen deficiency, toxic gases may be generated. Toxic gases such as NOX will be emitted. In the air, pollution occurs. Because of this, diesel vehicles are equipped with urea tanks that neutralize this toxic gas to prevent it from polluting the atmosphere.

2. The noise of diesel engines is relatively large, which is caused by its own construction and affects passengers' riding comfort. However, with the further advancement of technology, the noise control of diesel engines on mid-to-high-end models is now basically similar to that of automotive engines.

3. When the winter temperature is low, if the wrong diesel is selected, there will be freezing of tubing, which will lead to abnormal operation of the diesel engine.

Good diesel or gasoline car

From the above advantages and disadvantages can be seen, in fact, the life of the diesel engine is longer than the petrol car, long-distance bus running a year's distance is quite a lifetime of private car mileage, long-distance passenger car's engine is generally running a million kilometers After the overhaul, some better diesel vehicles did not overhaul the scrapped engine. The diesel engine had good resistance to fatigue. Long-term high-speed running or climbing did not result in power failure like gasoline vehicles, especially when air conditioning was used. . However, the disadvantages of the diesel engine are also obvious. The noise is greater than that of the gasoline engine, the speed is slow, the warm-up time in winter is long, and the vibration is also large. What kind of oil to see what car!

Suggestions: If you are often in the city, petrol cars are more convenient. If it is the long-distance running, it is strongly recommended that diesel vehicles, whether high-speed or mountainous, have the advantage that diesel vehicles cannot match. Of course, if you have more rice, if you do not care about oil, then it is another matter.