Why is a diesel engine stronger than a gasoline engine?

Because the compression ratio of the diesel engine is larger than that of the gasoline engine, we all know that the greater the air pressure in the same volume, the greater the energy generated! The cylinder, piston, crankshaft, flywheel and other running parts of the diesel engine are larger than the parts of the gasoline engine, and the internal compression rate of the cylinder is larger than that of the gasoline engine, because the diesel engine is spontaneously ignited by compressed air, while the gasoline engine is ignited by external assistance.

In order for diesel to ignite, it is necessary to produce strong compression, which is generally 6-12 for gasoline engines and 12-20 for diesel engines. Usually gasoline only needs 500 degrees to ignite, while diesel needs 700 degrees to ignite, 700 degrees ignition is to increase the temperature in the cylinder by compressed air spontaneous combustion, you think, how much compression ratio should there be? The air pressure strength generated by this time is very large, and the energy generated in the cylinder after the combustion explosion of diesel fuel is huge!

This chemical energy is converted into kinetic energy, so the diesel engine is much more powerful than the gasoline engine......The main thing is that the compression ratio is large, and the energy generated is large, so the power is large. The above is a personal opinion, if you are not sure, you can ask the ......... in detail

Compared to a gasoline engine! Why do everyone think diesel engines are more powerful?

Because diesel is more expensive than gasoline, diesel is generally used in mass vehicles, while gasoline is generally used in speed vehicles.

The compression ratio of diesel engines is higher than that of gasoline engines.

The ignition point of gasoline is lower than that of diesel, and at the end of their compression stroke, the pressure of the cylinder of the gasoline engine is only, which is ignited by a spark plug, and the pressure cannot be too high, otherwise the gasoline engine will not work normally. The pressure of the diesel engine reaches at the end of the compression stroke, and the pressure of the power stroke of the diesel engine is also higher than that of the gasoline engine. Therefore, when the cylinder diameter and speed are the same, the torque of the diesel engine is greater than that of the gasoline engine.

The main reason why diesel engines are stronger than gasoline engines is that the maximum working speed of diesel engines is much lower than that of gasoline engines, about 2000 rpm, while the maximum speed of gasoline engines is generally above 6000 rpm. According to the formula of "power = torque * speed", if the speed is relatively low and the power is basically the same, then its torque will naturally be larger.

The compression ratio of diesel engines is greater than that of gasoline engines. Those of us who have studied physics know that the greater the pressure of the same volume of air, the greater the energy generated! The cylinder, piston, crankshaft, flywheel and other moving parts of the diesel engine are larger than those of the gasoline engine, and the internal compression ratio of the cylinder is also larger than that of the gasoline engine, because the diesel engine is spontaneously ignited by compressed air, while the gasoline engine is ignited by external assistance.

In order to ignite diesel, it is necessary to produce a strong compression, which is generally 6-12 for gasoline engines and 12-20 for diesel engines. Usually chamel gasoline only needs 500 degrees to ignite, while diesel requires 700 degrees to ignite. 700 degree ignition relies on compressed air to raise the temperature in the cylinder for spontaneous combustion.

So the pressure generated is very large, and the energy generated in the cylinder after diesel combustion is huge! This chemical energy is converted into kinetic energy. The diesel engine is much more powerful than the gasoline engine, mainly because the compression is larger than the large town and the energy is larger, so the power is greater.

The most intuitive thing is that you will feel that the diesel opportunity is more dynamic. Millions of car purchase subsidies.

Compared with gasoline engines, diesel engines have more torque and lower rotational speed at maximum power for the same power. The greater the torque output, the greater the carrying capacity, the better the acceleration performance, and the stronger the climbing force, which also shows that the diesel engine is stronger than the gasoline engine.

Torque, like power, is one of the main indices of a car engine, and it is reflected in the performance of the car, including acceleration, climbing ability, etc. It is precisely defined as the cross product (m) of the vector (l) and the force (f), which is physically the force that rotates the object multiplied by the distance to the rotating shaft, and it can represent the amount of force output by the engine (because the radius of the crankshaft in the engine is constant).

In layman's terms, torque is an important criterion to measure the quality of a car's engine, and the size of a car's torque is directly proportional to the power of the engine.

This one. In fact, the main reason is that the compression ratio of the diesel engine is very large--- which is generally 12 22:1.

The diesel engine belongs to the compression-ignition engine, the compression stroke is close to the end of the diesel fuel injected into the cylinder is by absorbing the heat of the compressed high-temperature and high-pressure air in the cylinder and ignites by itself, in order to create favorable conditions for the spontaneous combustion of the diesel engine, the compression ratio must be designed higher.

Diesel engines are generally compression-ignition, and the ratio of the total cylinder volume to the combustion chamber volume is called the compression ratio, which indicates the degree to which the gas is compressed.

The compression bypass ratio indicates the degree to which the cylinder gas is compressed when the piston moves from the bottom dead center to the top dead center chain, which is used to express it.

The gasoline engine compression ratio is only about 12. In this way, the output of the diesel engine is higher than the effective efficiency of the diesel engine, the power is relatively increased, and the output torque is relatively large. The disadvantage is that the diesel engine has higher requirements for the strength of the machine.

And the start of the diesel engine is more difficult. Especially in winter, it is more troublesome to start.

Cattle. It's a cow. But with it comes the drawbacks.

The so-called "diesel engine is more powerful than gasoline engine" refers to the fact that diesel engine has the characteristics of high torque at low speed. The main reason is that the maximum working speed of the diesel engine is much lower than that of the gasoline engine, basically about 2000 rpm, while the maximum speed of the gasoline engine is generally above 6000 rpm. According to the formula of "power = torque x speed", in the case of basically the same power, if the speed of Shouqing Migo is low, then its torque will naturally be larger.

That is to say, the diesel engine is more powerful, burning the same amount of gasoline and diesel, and diesel can get more power. This is the difference between gasoline and diesel, not the problem of the engine itself, gasoline cars are ignited by spark plugs, diesel cars are compression ignition, gasoline cars speed up quickly, diesel cars have power, in contrast, diesel cars are more fuel-efficient.

Because the compression ratio of the diesel engine is much greater than the compression ratio of the gasoline engine, the torque of the diesel engine is greater than the torque of the gasoline engine

Summary. Because there is very little oil on the piston ring and cylinder wall, the sealing effect is not good, and there will be repeated start-up and cannot catch fire.

Hello, the viscosity of the lubricating oil increases greatly at low temperatures, and even solidifies, so that the engine starting resistance increases, and it cannot reach the minimum speed required to start the grip back machine (generally more than 100r min** minutes for the nuclear skin). At low temperatures, the terminal voltage of the battery decreases, the capacity decreases and the charging is insufficient, so that the starting motor cannot reach the starting speed when driving the crankshaft, or even cannot be carried at all.

Is there anything else I need to know?

If the speed is normal, it can't be started.

Manual Changzhou 18L

Because there is very little oil on the piston ring and cylinder wall, the sealing effect is not good, and there will be repeated start-up and cannot catch fire.

Sometimes, due to the wear and brightness of the cylinder, the bend is heavy, and the sealing performance of the cylinder is greatly affected, making the start more difficult. In this regard, the injector can be removed and 30 40ml of oil can be added to each cylinder to strengthen the sealing and burial width of the cylinder and increase the pressure during car maintenance contraction.

How to fix it. The injector can be removed and 30 40ml of oil can be added to each cylinder to strengthen the sealing performance of the cylinder and increase the pressure when the car is repaired and contracted.

Is there a picture. Hello, now there is no figure.

I don't understand it.

I don't have any machines right now, so I can't shoot anything.