What's the difference between a diesel engine and a gasoline engine

Some people say that diesel cars in foreign countries are better than gasoline cars at home. Which is better, a diesel or a petrol engine? What's the difference? Let's talk about diesel and gasoline engines today.

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

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Advantages and disadvantages of gasoline engine

A gasoline engine is a fuel that converts internal energy into kinetic energy. Due to the low viscosity of gasoline and fast evaporation, gasoline can be injected into the cylinder by the gasoline injection system. After being compressed to a certain temperature and pressure, the spark plug is ignited to make the gas expand and do work.

Advantages:

First of all, gasoline version price is relatively cheap, maintenance is very convenient. It is much easier to change parts for a petrol version than for a diesel engine. High engine speed (the trucks with gasoline engine speed is usually 3000-4000 r/MIN, sedan with a gasoline engine top speed of 5000-6000 r/MIN), good adaptability, stable work, soft, easy to operate and effort, the quality is light, low noise, low cost, easy to start, such as in cars and small and medium-sized truck and has been widely used on military off-road vehicles,

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Disadvantages:

The fuel consumption rate is high, the economy is poor, and the exhaust purification index is low. As cars, buses and other gasoline engine vehicles are driven in the city, often because of road congestion often is in and open position, the engine is also often idle running, the temperature is low, even in the normal operation of gasoline engine under the condition of temperature and pressure are lower than diesel engine, so under the working conditions of gasoline engine, engine oil is easy to produce low-temperature sludge, so the demands of gasoline engine oil has good low temperature sludge dispersibility.

Advantages and disadvantages of diesel engines

Diesel engines are engines that burn diesel for energy release. It was invented by German inventor Rudolf Diesel in 1892. To commemorate the inventor, Diesel was expressed by the name Diesel. Diesel engines are also known as Diesel engines.

Advantages:

1. Long life and economic durability. Diesel engine has low rotating speed, relevant parts are not aging, parts wear less than gasoline engine, and relatively longer life, no ignition system, fewer auxiliary appliances, so the failure rate of diesel engine is far lower than that of gasoline engine.

2. High security. Compared with gasoline, diesel oil is more stable and safer than gasoline because it is less volatile, has a higher ignition point, and is less likely to be ignited or explode by accident.

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3. Low speed and high torque. Diesel engines usually produce high torque at very small speeds, which is better on complex roads, hills and loads than petrol engines. However, the performance of the high speed level of the highway, high-speed driving is not as good as gasoline cars.

Disadvantages:

1. The ignition method of diesel engine is compression ignition. Compared with gasoline vehicle, it has no spark plug structure. Because of this, diesel vehicles are equipped with urea tanks that neutralize the toxic gas to prevent it from polluting the atmosphere.

2. The noise of diesel engine is relatively large, which is caused by its own construction and affects the comfort of passengers. However, with further advances in technology, the diesel engines that now carry on the mid-to-upper end of vehicles have a similar noise control to those used in cars.

3. When the temperature is low in winter, if the diesel oil is chosen wrong, the oil pipe will be frozen, causing the diesel engine to work improperly.

Better a diesel or a petrol car

Out the advantages and disadvantages of the above we can see, in fact much more than gasoline vehicle, in the life of the diesel engine, the bus ran away quite open for the rest of your life a year the range of private cars, bus engine generally run one million kilometers after overhaul, some better both diesel and scrap car engine overhaul, diesel engine, good resistance to fatigue long run high-speed or climbing won't appear like gasoline vehicles power failure, especially when with air conditioning. But the disadvantages of diesel engines are also obvious. They are noisier than gasoline cars, speed up slower, take longer to warm up in winter, and vibrate more. Look at what oil you use!

A word of advice: gasoline cars are more convenient if you are often in the city. If you are a long-distance runner, diesel cars are strongly recommended. No matter they are high speed or mountainous areas, the advantage of diesel cars is impossible to be compared with gasoline cars.