Is it harmful to the engine if you drive with oil on the floor frequently? Can it still "explode"?

Hello everyone, I am Wang Qi. Recently, a friend asked me if turning the engine speed to 6,000 to 7,000 rpm will damage the engine? Can it even cause the engine to "explode"? In this issue, I will tell you whether the engine can be stepped on and explode!

Let me throw the conclusion to you first. As long as the engine is in normal condition, Han Han can’t even step on it! It will neither damage the engine nor explode the cylinder!

Have you watched too many movies and thought that the engine would break down just by kicking the accelerator a few times? Let me tell you how engines explode in movies~

Engine speed is the root cause of cylinder explosion

In the movie "Flying Life" starring Han Han and Shen Teng, there are In one scene, the racing driver played by Shen Teng was in a driving school and the trainer's car was stepped on and the cylinder exploded.

When Shen Teng pressed the accelerator to the bottom, the engine speed had already climbed to the red line range. Just a few seconds later, the engine cover was completely lifted and flew out, accompanied by a large stream of white smoke. And out.

In the movie "Fast and Furious 7", there is also a scene about an engine explosion. Starring Vin Diesel told Michelle Rodriguez to control the engine speed below 9,000 rpm, and the piston of her opponent's R8 would be destroyed if it ran 200 meters.

Although the people driving in the movie are not ordinary people, in the plot, there is no demonstration of the driving skills of the racing drivers, they just simply step on the accelerator. Shen Teng was even more exaggerated, and the engine cover flew out. Could it be that just stepping on the accelerator can cause the engine to explode?

Cylinder explosion refers to an engine explosion

It is by no means as simple as lying down

"Cylinder explosion" refers to an engine explosion. Represented by American straight-line acceleration cars, when an engine explodes like this, complete decomposition is considered a real cylinder explosion. It's not as simple as you see white smoke coming out of the exhaust pipe and spraying some engine oil.

In fact, the two movies also gave better explanations. They were both bombs, but the results were completely different. Even the hood of Shen Teng's coach flew up, but the Audi R8 had little reaction. Apart from emitting some white smoke, it just lay there.

The performance of the trainer car can be regarded as a cylinder explosion. After all, the engine cover has been ejected by the huge impact force, indicating that the engine has basically disintegrated. The Audi R8 most likely has a broken piston, which is far from a cylinder explosion.

Cylinder pulling and axle holding

Have you ever heard of oil burning? Many cars burning oil are caused by cylinder pulling. To put it bluntly, the engine oil is no longer working, and you don’t take it seriously at all!

Cylinder pulling is a phenomenon where there is no oil lubrication between the piston and the cylinder wall, resulting in dry grinding. You can understand it as when you take a bath, you don't even wash the water, just come up and give you a dry rub. In just a few strokes, your skin will be broken, and the broken skin is the wall of the tank. In this case, it is necessary to replace the skin, which is to overhaul the engine.

Axle locking means that the engine crankshaft cannot rotate and is locked. If you have ever ridden a bicycle, the intermediate shaft that is equivalent to the pedal connection is rusty and cannot rotate. This situation also requires an overhaul to resolve.

The above two are relatively minor engine mechanical failures. Many old cars with a large mileage and models with more than 100,000 kilometers are more likely to have this phenomenon. The main reason for pulling the cylinder and holding the shaft is insufficient lubrication of the engine oil, and the places that should be lubricated are not lubricated.

Cracked parts

Cracked original engine pistons, broken connecting rods, cracked cylinders and other phenomena are basically due to unreasonable design and product quality problems, which are rare. Parts were damaged due to violent driving. If you drive violently, the engine will pull the cylinder or hold the shaft first instead of breaking parts. Because engine oil is more prone to problems than parts. Even if the parts are broken, the engine can still be repaired, but the cost will be higher.

Another important reason for broken parts is long-term engine knocking and cylinder knocking. Knocking and knocking indicate that there is something wrong with the engine, resulting in broken parts, not because you stepped hard. If it were Tang Monk who stepped on it, he would still be broken~

Broken parts are equivalent to when boiling water in a kettle, the bottom of the kettle leaks before the water boils.

Then, in order to attract attention, some people insist on claiming that the bottom of the kettle exploded and leaked when the quality of the bottom of the kettle was obviously not up to standard. It sounds more exciting. Look, I can make the kettle explode~

Engine explosion

Cylinder explosion really means that the engine explodes and completely disintegrates. This is not a fantasy, it is real. In American-style acceleration drag racing, engine explosions are almost commonplace. It's just that this kind of movement doesn't exist in China, you just haven't seen it. In this case, the engine cannot be repaired and can only be replaced with a new one.

After talking about the three different levels of hazards, we already know the ultimate definition of "cylinder explosion". Now even if you have a weak foot, you can't step on the original engine to explode the cylinder!? Even if it is a lighter broken part, you can't step on it!

The strength of the engine cylinder is very high

The strength of the engine cylinder is much greater than you think. It can generally withstand high pressures of 200bar and temperatures below a thousand degrees. high temperature. It is really difficult to make them explode~

The original engine has a protection mechanism

Theoretically, as long as the pressure inside the engine is large enough, the engine can explode, so it explodes The risk is still there. Automobile manufacturers produce cars, not bombs, so engineers must find ways to avoid this risk.

The method is very simple, limit the engine speed. The higher the speed, the faster the mixture burns, the greater the pressure, and the easier it is to explode.

You will find that when you step on the engine speed to the red line area, the speed will basically not go up. The purpose is very obvious, which is to prevent excessive speed from causing damage to the engine. The specific principle is to limit the amount of fuel injection, that is, the amount of fuel injection is smaller than before, but it is not a fuel cut off as others said, which means no fuel injection at all.

Some automatic transmission models are even more restrictive, and the speed of the throttle will not exceed 3,000 rpm at all. Hitting the accelerator to the red line area may cause the transmission oil to become too hot and damage the transmission, so just leave it where you are without adding oil at all.

As long as the engine is in normal working condition

You can’t step on it!

There are always exceptions to everything, and cylinder pulling and shaft holding are not uncommon. These two situations are directly related to the engine oil and water temperature.

Engine oil

Cylinder pulling and shaft holding are both caused by insufficient engine oil lubrication. Lack of engine oil and deterioration of engine oil quality will lead to insufficient engine oil lubrication. Therefore, it is very important for us to change the engine oil regularly and check the remaining amount of engine oil.

Water temperature

The engine has very strict requirements on water temperature, just like us humans are sensitive. As long as you have a high fever, your whole body will hurt. The high water temperature in the engine will cause some metal parts to deform. Especially today's all-aluminum engines have stricter temperature requirements. Once the engine gets too hot, the probability of cylinder pull is very high. So, pay close attention to the water temperature.

Operating conditions

Operating conditions are the working status of the engine. If an ordinary person were to run a marathon, he would not suffer sudden death but would be seriously injured, so don't overload the engine. For example, overloading, sudden cuts on the track, and steep slopes in the desert are all very likely to cause the engine to pull the cylinder and hold the shaft.

Just pay attention to the water temperature, engine oil and working conditions

You can drive it as you like!

In the movie "Flying Life", the coach car is an ordinary family car, and no modifications are made to the power system at all. Shen Teng stepped on it and exploded the cylinder, which was completely necessary for the plot of the movie. Even if George Han stepped on it, it wouldn’t explode!

For our daily use of cars, as long as the engine oil and water temperature are within the normal range, don't overload the engine, and you can just drive the rest. Want to blow up the engine? The difference is really not as simple as a weak foot!

Power comes first

There are very few additional restrictions

The only purpose of racing is performance. What if you want the engine to explode with more performance? Just like athletes, doping! The fuel injection volume of the racing car is huge, and the fuel consumption can reach 80 liters per 100 kilometers. Moreover, the gasoline used is racing gasoline, the 104-number type, which has a much higher calorific value than ordinary gasoline. The main thing is that there are very few additional restrictions.

There is no speed protection or emission limit at all~

High calorific value, large fuel injection volume and no limit, the final configuration is a mess. The engine at this moment is a time bomb. When it wants to detonate depends on how Tian Canji performs.

In fact, today’s cars are much more durable than you think, and both their durability and failure rate are much better than before! Friends, please don’t hold the car in your hands and be afraid to use it. The car serves us, not us serving the car. That’s it for now, see you in the next issue~

This article is from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.