Why can t gasoline cars be filled with diesel?

There are many different types of cars. However, it can be mainly divided into two categories: gasoline vehicles and diesel vehicles. It seems that it has become a common practice that gasoline cars can only be filled with gasoline, and diesel cars can only be filled with diesel. But why is that?

The first reason: the difference between gasoline and diesel, gasoline has a low carbon content, and diesel is relatively high, and the density difference is also very large, their relationship is equivalent to light water and heavy water, gasoline and diesel are like the difference between light oil and heavy oil. Because of this, diesel has a low ignition point and is not volatile compared to gasoline, whereas gasoline has a high ignition point and is volatile.

In a gasoline engine, the gasoline ejected from the injector and the air entering by the throttle valve enter the cylinder after the mixture enters the cylinder. When the r-reduction stroke is near the end, it is ignited by a spark plug, which also becomes an ignition type.

What are the consequences of adding the wrong diesel, on the one hand, the pressure of the fuel injector of the gasoline engine is smaller than that of the diesel engine, after the diesel is added to it, the diesel cannot be completely atomized, and the combustion is not sufficient, so that the engine is weak, and the accelerator does not go, and the car will emit black smoke. There is also a situation where the ignition point of diesel fuel is low, and before the spark plug ignition, the diesel itself is already burning violently, resulting in abnormal pressure in the combustion chamber, which is commonly known as detonation, which will have great safety risks.

Therefore, for your own safety and smooth driving, it is safest to add gasoline to gasoline and diesel to diesel car.

Because the ignition methods of diesel and gasoline are different, gasoline is ignited by spark plugs, diesel is burned by compression, and gasoline vehicles cannot ignite diesel because of their low compression ratio, so they cannot be added.

In layman's terms, the power of diesel is not enough to start a car with a gasoline engine, and even if it can start, it will turn off after a few steps, because diesel cannot drive a gasoline engine.

A diesel car can be filled with a small amount of gasoline, but it is not good. The power of the car will deteriorate or the engine will shake. When too much gasoline is added, it will cause the vehicle to fail to start.

The pressure of the diesel engine fuel injector is greater than that of the gasoline engine fuel injector, and after the diesel fuel is added to the gasoline engine, the pressure of the fuel injector is not enough, resulting in insufficient diesel atomization, which can only be partially atomized. As a result, some diesel fuel directly enters the cylinder in the form of liquid, which is not fully combusted, easy to accumulate carbon, and will clog the fuel injector. In this way, you will feel the engine weakness when driving, and it will be difficult to run.

Diesel has a low ignition point, and before the spark plug ignites, the diesel has reached the auto-ignition temperature and begins to burn violently, causing a problem called "knocking". A slight knock will not have much impact on the engine, but it is usually severe if the knock is caused by an engine problem, such as severe carbon deposits or poor heat dissipation.

Diesel engine features:

Diesel engines have high torque and outstanding load capacity, so many trucks and hard-core off-road vehicles will use diesel engines, and this series of advantages depends on the special ignition and combustion method of diesel engines.

The common ignition method is divided into ignition and compression ignition, and the diesel engine is the compression ignition, the so-called compression ignition is that after the diesel enters the combustion chamber, it mainly relies on the pressure of the piston in the cylinder to ignite the diesel, so it requires a large compression ratio, and then outputs greater torque, so the diesel engine is relatively more energetic than the gasoline engine, and the instantaneous acceleration is faster.

Diesel has a much higher ignition point than gasoline, which has a very low ignition point and does not need to compress air to burn. This is why the diesel engine and gasoline can still be started (but the gasoline contains less carbon, which is why the gasoline engine is weaker than the diesel engine), but the reason why the gasoline engine should be ignited by a spark plug is: in order to reduce the stroke of the cylinder (that is, the compression ratio), we all know that the longer the stroke of the cylinder, the engine will work very roughly, the vibration and noise will be very large, and when you make the stroke of the cylinder very long, the maximum speed of the engine will be much lower, and the speed will be low. The power is small.

Moreover, gasoline contains less carbon and does not require much air to burn, and gasoline is a flammable and explosive oil, which can be ignited by spark plugs to generate sparks. That's why gasoline engines can reach very high speeds. (Generally it can reach about 6000 rpm), so the compression ratio of the general gasoline engine is 1:

Left and right, some larger, are to improve fuel economy.

Diesel contains a lot more carbon than gasoline, which is why there is a lot of black smoke from trucks on the road. With a lot of carbon and a high ignition point, making the compression ratio a little larger is a double win. Generally 1:

Around 17. The reason why the spark plug is not used is because the ignition point is high, and it cannot be lit with a spark plug.

Finally: gasoline can be compressed and ignited, I don't believe you try to put gasoline into a diesel engine, but gasoline contains much less carbon than diesel, and it is very boring to drive. If the gasoline engine is ignited with compression, the compression ratio will be much larger than that with a spark plug, and the consequences will be:

The gasoline engine works roughly, rotates slowly, makes noise, has low power and other shortcomings!

So: a diesel car can still start with gasoline, but it doesn't have any strength.

The diesel engine is compression ignition, the gasoline engine is ignited, the main components of gasoline without diesel are alkanes, but the difference in composition is relatively large, so many characteristics of diesel and gasoline are very different, diesel car plus gasoline will cause the engine to fail to run, this is their own opinion, I hope to help you.

The way of ordering diesel and gas oil is different, your car is diesel, you must not add gas, you can't use it, and the gas-oil car can't add diesel. The diesel engine is started by compression ignition, and the gas-oil engine is started by electronic ignition. Do you imagine the same in between?

So don't do these stupid things. If you fill in the wrong oil, you have to pour out the oil in the tank and refill it.

OK. However, diesel has a high carbon content, so the oxygen intake of the corresponding diesel engine is naturally large, so after you change to gasoline, although it will continue to start, it will be accompanied by the phenomenon of stalling When you add diesel again. It won't get normal right away.

If the amount is small, it will cause the engine to burst out. Flying cars, etc.; The amount is too large, and the car is not on the road, which damages the oil pump. Fuel injection heads, etc.

Yes, you just don't want the car to start, just add gas.

Of course not, gasoline is ignited by spark plugs, and diesel is ignited by compression.

What happens when a gasoline car is filled with diesel.

Diesel has a lower ignition point than gasoline but a higher flash point than gasoline.

Gasoline is not supported in general diesel vehicles. But if you can, you have to clean the tubing first.

I can tell you responsibly that under normal circumstances, no, there will be a knock and damage to the machine. But if it is not easy to start in winter, if you do this, the machine will vibrate too much.

Of course, it can't be mixed, and if you add gasoline, it can't start, because the gasoline will burn before the piston is compressed, and the consequence is of course that it can't be started. If mixed, if the proportion of gasoline is too high, it will increase the octane number in the diesel, and the combustion temperature and time are abnormal, and there will be phenomena such as burning the top, pulling the cylinder, and breaking the ring. When it's cold, you can put some kerosene in the diesel.

Mixing gasoline is not good for the machine.

How to add gasoline to a diesel car explains the difference between a diesel engine and a gasoline engine.