What does a diesel supercharger do with 40

Turbochargers are divided into exhaust gas turbochargers, composite exhaust gas turbochargers and combined turbochargers according to the boosting method. Their roles are as follows:

1. The exhaust gas turbocharger uses the exhaust gas discharged by the engine with a certain energy to enter the turbine and expand for work, and the full power of the exhaust gas turbine is used to drive the compressor working impeller that rotates coaxially with the turbine, and the fresh air is compressed in the compressor and then sent into the cylinder. The exhaust gas turbine and compressor are usually integrated into one piece, which is called the exhaust gas turbocharger. Its structure is simple, reliable work, the general diesel engine is reasonably installed with exhaust gas turbocharging system, can increase the power by 30% 50%, reduce the specific fuel consumption by about 5%, is conducive to improving the power performance, economic performance and emission quality of the whole machine, so it has been widely used.

2. Composite exhaust gas turbocharger. The exhaust gas turbocharger is to work in series with the exhaust gas turbine and the exhaust gas turbocharger, which is called a composite exhaust gas turbocharger. In some diesel engines with a high degree of supercharging, in addition to driving the exhaust gas turbocharger, the excess energy is used to drive the low-pressure exhaust gas power turbine, which is connected to the engine output shaft through a gear transmission and a hydraulic coupler.

In this way, the exhaust gas turbocharger achieves the purpose of supercharging, while the exhaust gas power turbine converts the exhaust gas energy directly into power and sends it to the crankshaft. The composite exhaust gas turbocharger can make full use of the exhaust gas energy and greatly improve the power performance and economic performance, but the structure is complex, the cost is high and the technical difficulty is great.

3. Combined turbocharger. The combined turbocharger is a combination of exhaust gas turbocharging and intake inertia supercharging. In this booster system, in addition to the exhaust gas turbocharger, there is also an intake inertial pressurization system composed of a pressure stabilizing box, a resonance tube, a resonance chamber, etc., which can further increase the intake pressure after boosting by using the peak pressure.

This system improves the acceleration performance of the diesel engine and is beneficial to the improvement of the low-speed torque of the diesel engine.

It is to increase power and reduce fuel consumption.

In general, the supercharged and non-supercharged power is increased by about 30%.

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Increase the air intake of the engine so that the engine emits maximum power.

Increase the intake pressure, increase the intake volume, and allow the diesel fuel to burn more fully and achieve more power.

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Assisted and enhanced operation.

It uses the inertia impulse of the exhaust gas discharged by the engine to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller, and the impeller pressurizes the air coming in from the air filter pipe to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase, and the impeller compresses more air into the cylinder, so that more fuel can enter the cylinder for combustion, so that the output power of the engine can be increased.

The function of the supercharger: to increase the amount of oxygen intake, so that the combustion of diesel fuel is more sufficient, so as to increase the power of the diesel engine. Without a supercharger or intercooler, the power of the diesel engine will decrease, and at the same time, due to the different fuel supply of the high-pressure oil pump of each model, it will cause great damage to the generator and waste fuel.

The main function of the turbocharger of diesel generator set is to press the air into the cylinder, and this process is called pressurization. Four-stroke diesel engines are mostly supercharged with exhaust gas turbochargers, with the aim of maximizing the use of exhaust gas energy. This is because the energy taken away from the exhaust after the oil of the large diesel generator set is combusted, which is equivalent to 35% 40% of the heat energy developed by the fuel oil, so that these energies are further expanded and utilized in the turbine, which is equal to the combustion heat energy of the diesel fuel to achieve the purpose of supercharging.

Under a certain speed, the size of the torque issued by the diesel generator set is closely related to the density of the mixture in the cylinder, improve the intake pressure of the large diesel generator set, increase the air intake volume of the cylinder, and increase the amount of fuel injection accordingly, you can increase the torque and power of the diesel generator set (generally the power can be increased by 30% 100%) under the condition that the basic structure changes little, and due to the increase in the density of the mixture, the combustion is improved, so that the exhaust pollution and fuel consumption rate can be reduced (the general fuel consumption can be reduced by 3% 10%)。 This method is commonly known as the reinforcement of large diesel generator sets, and has been widely used for high-power large diesel generator sets.

How turbochargers work:

The inertia impulse of the exhaust gas discharged by the engine is used to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller, and the impeller presses the air sent by the air filter duct to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously, the impeller compresses more air into the cylinder, and the pressure and density of the air increase can burn more fuel, and the corresponding increase in fuel volume and adjust the speed of the engine can increase the output power of the engine.

First of all, let's talk about the general structural principle of the turbocharger, the exhaust gas turbocharger is mainly composed of a pump wheel and a turbine, and of course some other control elements. The pump wheel and the turbine are connected by a shaft, that is, the rotor, and the exhaust gas discharged from the engine drives the pump wheel, which drives the turbine to rotate, and the turbine rotates to pressurize the air intake system. The supercharger is installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the speed of the rotor is very high when the supercharger is working, which can reach more than 100,000 revolutions per minute, such a high speed and temperature make the common mechanical needle roller or ball bearing unable to work for the rotor, so the turbocharger generally adopts a full floating bearing, which is lubricated by oil, and the coolant cools the supercharger.

Previously, turbochargers were mostly used in diesel engines, and now some gasoline engines also use turbochargers. Because gasoline and diesel are not burned in the same way, the engine uses a different form of turbocharger.

A gasoline engine is different from a diesel engine in that it is not air that enters the cylinder, but a mixture of gasoline and air, which is prone to deflagration if the pressure is too high. Therefore, the installation of a turbocharger must avoid deflagration, and there are two related issues involved, one is the control of high temperatures and the other is the control of ignition time. After mandatory supercharging, the temperature and pressure of the gasoline engine during compression and combustion will increase, and the deflagration tendency will increase.

In addition, the exhaust temperature of the gasoline engine is higher than that of the diesel engine, and it is not appropriate to increase the valve overlap angle (the time when the intake and exhaust valves are opened at the same time) to strengthen the cooling of the exhaust, and reducing the compression ratio will cause insufficient combustion. In addition, the speed of the gasoline engine is higher than that of the diesel engine, and the air flow rate changes greatly, which can easily cause the turbocharger to lag behind. In view of a series of problems in the use of turbochargers in gasoline engines, engineers have made targeted improvements one by one, so that gasoline engines can also use exhaust gas turbochargers.

Diesel vehicles are generally turbocharged with exhaust gases, and the exhaust gas is used to drive the impeller to play a supercharging role.

Can the supercharger of the diesel engine be enlarged, Hello dear, the naturally aspirated diesel engine can be directly equipped with a turbocharger. It's just that the modification will affect the service life of the engine, which is the main trade-off of the car. The main function of turbocharging is to increase the air intake of the engine, thereby increasing the power and torque of the engine and making the car more powerful.

When an engine is equipped with a turbocharger, its maximum power can be increased by 40% or more compared to without a turbocharger. This means that the same engine can produce more power after being pressurized. Take our most common turbocharged engine, for example, after supercharging, the power can reach the level of the engine, but the fuel consumption is not much higher than the engine, on another level is to improve fuel economy and reduce exhaust emissions.

After changing the supercharge, the pressure and temperature of the engine during operation are greatly increased, so the engine life will be shorter than that of the engine with the same displacement without supercharging, and the mechanical properties and lubrication properties will be affected.

1. The pressure increase is different.

Diesel engine turbocharger: Diesel supercharging is higher than supercharging gasoline supercharging pressure.

Turbocharger for gasoline engines: Gasoline supercharging is lower than diesel supercharging.

2. The supercharger is different.

Diesel engine turbochargers: Turbochargers rotate at a slower speed and increase coolant intensity lower than gasoline engine turbochargers.

Turbocharger of gasoline engine: The speed of gasoline engine is higher than that of diesel engine, the air flow rate is fast and the range of variation is large, and the turbocharger has higher requirements.

Working principle of supercharged diesel engine:

The air entering the engine cylinder is compressed in advance to increase the pressure of the air entering the cylinder, so that the filling quality increases, and with the proper cooperation of the oil supply system, more fuel can be injected to make more fuel burn well, so as to improve the power of the diesel engine, improve the specific power, improve the fuel economy, reduce the exhaust emission and noise.

Pressurization: The air entering the cylinder of the diesel engine is pre-compressed through the compressor mechanism (supercharger) to increase the inlet pressure and increase its density.

Intercooling: The pressurized air is cooled by an intercooler to reduce the temperature and increase its density. Such an engine is called a supercharged intercooled engine.

Dear, I am glad to answer for you: the lubricating oil pressure of the diesel engine supercharger is the pressure ratio varies from the intervention to the maximum working condition. The maximum pressure ratio depends on the rubber content adjustment when each model is matched.

Here's a closer look at it:1Introduction 1:

A supercharger is a device used by a piston engine to increase the intake pressure of a nuclear cylinder. The air entering the engine cylinder is compressed by the supercharger, increasing the density of the air, so that more air is filled into the cylinder, and the engine power is increased. 1.

Introduction 2: The declared pressure ratio of the inlet and outlet of the supercharger is Introduction 3: The speed and pressure of the supercharger depend on the state of the engine.

3.Introduction 4: The supercharger works by the exhaust gas discharged from the engine, and the amount of exhaust gas discharged from the engine directly affects the speed and pressure of the supercharger.

The functions of the turbocharger are as follows: 1. Improve the power of the engine. In the case of the same engine displacement, the engine can be injected more fuel by increasing the density of air intake, so as to improve the power of the engine, and the power and torque of the engine after the supercharger are increased by 20% or 30%.

On the contrary, under the requirements of the same power output, the bore of the engine can be reduced, and the volume and weight of the engine can be reduced;

2. Improve engine emissions. Turbocharger engines reduce the amount of harmful components such as particulate matter and nitrogen oxides in the engine exhaust by improving the combustion efficiency of the engine. It is an indispensable configuration for diesel engines to meet Euro II emission standards or above;

3. Provide the function of plateau compensation. In some high-altitude areas, the higher the altitude, the thinner the air, and the engine with a turbocharger can overcome the power drop of the engine caused by the thin air on the plateau;

4. Improve fuel economy and reduce fuel consumption. Due to the better combustion performance of the engine with turbocharger, fuel savings of 3%-5% can be achieved.

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