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List of the catalog of this article:

• 1, The meaning and advantages of in-cylinder injection?
• 2, What is the working principle of the in-cylinder direct injection system of gasoline engine?
• 3 、 What is the direct injection technology in the cylinder of an automobile?

What is the meaning and advantages of in-cylinder injection?

As the name implies, in-cylinder direct injection means to inject fuel directly into the cylinder, which is different from other positions where the fuel injector is placed in front of the intake valve. The air burned by the direct injection engine is pure air before entering the valve, not an oil-gas mixture.

In-cylinder direct injection (GDI) is the technology of directly injecting fuel into the cylinder and mixing the intake. The advantages are low fuel consumption, large lifting power, and a compression ratio of up to 12, which is 10% more powerful and torque than general engines with the same displacement. Its disadvantage is that the parts are complex and the price is usually expensive.

In addition, direct injection in the cylinder can reach a high injection pressure (up to 150~200bar). The direct benefits of these are that the mixture of fuel and air is more uniform and the combustion is more adequate, so it can reduce fuel consumption and enhance power.

It can cool the temperature in the cylinder and improve the inflation efficiency. The direct injection low load in the cylinder injects fuel in the compressed stroke. Before injecting oil, due to the high air temperature, the heat transfer rate of the cylinder wall to the air is reduced. When the fuel is injected in, its evaporation is charged.The cooling effect is maintained for a long time, and the gas temperature is low at the time of ignition, which finally reduces the explosion trend.

What is the working principle of the in-cylinder direct injection system of gasoline engine?

1. Working principle: FSI technology adopts two different combustion modes, namely homogeneous combustion mode and layered combustion mode.

2. The principle of in-cylinder direct injection: In fact, the starting point of the in-cylinder direct injection design is to realize the thin combustion of the gasoline engine. To put it bluntly, it is to mix more air with less gasoline to burn, but it can achieve the same power output, thus reducing the consumption of gasoline.

3. And the direct injection in the cylinder is to directly spray the fuel into the cylinder and mix it directly with the air in the cylinder.

What is in-cylinder direct injection engine

1. In-cylinder direct injection gasoline engine, as the name implies, is to spray gasoline into the cylinder. It installs the fuel injector in the combustion chamber and sprays gasoline directly into the combustion chamber of the cylinder. The air enters the combustion chamber through the intake valve and is ignited with gasoline.

2. As the name implies, in-cylinder direct injection means to inject fuel directly into the cylinder, which is different from other positions where the fuel nozzle is placed in front of the intake valve. The air burned by the direct injection engine is pure air before entering the valve, not an oil-gas mixture.

3. In-cylinder direct injection (GDI) is the technology of directly injecting fuel into the cylinder and mixing the intake. The advantage is the fuel consumption.Low, large lift power, compression ratio up to 12, and the power and torque are increased by 10% compared with general engines with the same displacement. The disadvantage is that the components are complex and the price is usually expensive.

4. The inter-injection engine has only one fuel pump, which is driven by a 12V electric motor.

What is the direct injection technology in the cylinder of an automobile?

1. In-cylinder direct injection technology refers to the setting of the fuel injector between the intake and exhaust valves, and the high-pressure fuel is directly injected into the combustion chamber for smooth and efficient combustion. The direct injection in the cylinder is promoted by uniform combustion and layered combustion to reduce fuel consumption, especially under low load, and the power is also improved. A kind of technology.

2. In-cylinder direct injection (GDI) is a technology that directly injects fuel into the cylinder and mixes the intake.The advantages are low fuel consumption, large lifting power, and a compression ratio of up to 12, which is 10% more powerful and torque than general engines with the same displacement. Its disadvantage is that the parts are complex and the price is usually expensive.

3. FSI stands for Fuel Stratified Injection, which stands for Volkswagen's in-cylinder direct injection engine. Theoretically, engines using FSI technology have at least two combustion modes: stratified combustion and homogeneous combustion. Judging from the above three English words, stratified combustion should be a characteristic of FSI engines.

4. It belongs to the in-cylinder direct injection engine. The technology of directly spraying fuel into the cylinder and mixing the intake is called in-cylinder direct injection. The advantages of in-cylinder direct injection are that the engine has large power, high compression ratio, low fuel consumption during operation, and more stable and more environmentally friendly operation.

5. [Pacific Automobile Network] There is only one type of in-cylinder direct injection technology, which is fuel layered injection technology, which mainly injects fuel from the fuel injector to the cylinder of the engine. The technology can improve the thermal efficiency of gasoline engines and thus reduce the emission standards of vehicles. In-cylinder direct injection technology is now not only used for steam Oil engines and diesel engines are also used.

What is in-cylinder direct injection start?Machine