Advantages and disadvantages of turbocharged engines, advantages of turbocharging?

First, let's figure out what turbocharging is. Generally speaking, if we see Turbo or T at the rear of the car, it means that the engine used in the car is turbocharged.

The main function of turbocharging is to increase the air intake of the engine, increase the amount of fuel injection while increasing the air intake, so that the car's single work explosive force is stronger, so as to improve the power and torque of the engine, and make 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.

However, after being supercharged, the pressure and temperature of the engine are greatly increased when working, 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, which also limits the application of turbocharging technology in the engine to a certain extent!

Advantages: Under the premise of the same displacement, the power and torque of the engine can be greatly improved, about 40%, that is, it can be equivalent to. Fuel burns more fully.

Disadvantages: Maintenance is quite expensive, and most of the time in the city the turbocharger does not work, because it is generally set at about 3500 rpm before the turbocharger is activated. Moreover, the power output response of the car with turbocharging lags behind, and there will be a delay in speeding up when the accelerator is pressed, because the exhaust gas turbocharger needs the exhaust gas drive of the engine, and the turbocharger does not immediately improve the work efficiency when you step on the accelerator, and it will take more than two seconds to react.

Admittedly, turbocharging does increase the power of the engine, but it has a number of drawbacks, the most obvious of which is the lag in power delivery. Let's take a look at the previous working principle of turbocharging, that is, because the inertia of the impeller reacts slowly to sudden changes in the throttle, that is to say, there is a time lag between when you press the throttle to increase the horsepower, and when the impeller rotates to press more air into the engine to get more power, and this time is not short. Generally, the modified turbo also takes at least 2 seconds or so to increase or decrease the engine power output.

If you want to accelerate suddenly, you will feel like you can't speed up in an instant.

Life is not only for money, it is more right, turbocharging is generally involved between 40 and 60 yards, and it will lag or even not work on 80 and 100 yards.

It's a bit of a burn of oil, but it's relatively fuel-efficient and boosts the power.

Turbo low rpm high rpm will lag or not work!

The advantages of turbocharging are increased engine power and torque, fuel economy, and cost savings.

1. Improve the power and torque of the engine

The biggest advantage of turbocharging is that it can greatly increase the power and torque of the engine without increasing the engine displacement. When an engine is equipped with a turbocharger, the maximum power output can be increased by about 40% or more compared to the engine without a turbocharger.

This means that an engine of the same size and weight can produce more power when pressurized, or that a smaller engine can produce the same power as a larger engine when pressurized.

2. Fuel saving

Whether it is a naturally aspirated car or a turbocharged car, car owners are very concerned about the issue of "fuel economy". In general, turbocharged cars are more fuel-efficient than naturally aspirated cars. Turbocharged engine"Fuel efficient"This is reflected in two points:

First, because of the improvement of technology, the current turbocharged engine is indeed more fuel-efficient than in the past;

Second, the turbocharged engine is not supercharged because the exhaust pressure is not enough to push the turbo at low speed, and at this time, the fuel consumption level of the turbocharged engine under the same technical conditions is equivalent to that of the naturally aspirated engine of the same displacement.

3. Cost saving

The small size and simple structure of turbocharged engines make their development and production costs much lower than those associated with optimizing large-displacement naturally aspirated engines.

How turbocharging works:

The gasoline engine is based on the combustible mixture formed by gasoline and air in the cylinder combustion to do the power output, the size of the output power and torque of the EFI gasoline engine depends on the amount of air entering the cylinder, when the engine performance has been in the best state, in order to improve its output power only by compressing more air into the cylinder to increase the amount of combustible mixture.

So as to improve the combustion function and increase its output power. The turbocharger is a control device that uses pressure to drive the pump wheel impeller in the casing to rotate, thereby driving the turbine wheel of the intake booster chamber to press air into the cylinder, so as to increase the power output of the engine.

But what I would say is that this is clearly not true.

For gasoline engines, it has always been the combustion controlled by the air-fuel ratio (not that the equivalent ratio is always 1), the air intake and fuel are well proportioned, and the amount of air intake is sprayed with as much oil. Turbocharging does not improve combustion efficiency, nor does it actively improve thermal efficiency, or make combustion more sufficient. no

For gasoline engines, the value of turbocharging lies in further squeezing the engine power, and more gas can be injected with more oil, so as to achieve small displacement and high power.

Turbocharging is an effective means to achieve engine downsizing, and turbocharging can increase the power boost.

Generally speaking, under the premise of achieving the same power output or torque output, the engine can be made smaller after using turbocharging, reducing a cylinder or something, and the displacement will be smaller, so that my mother no longer has to worry about my displacement tax.

It can greatly increase the power of the engine on the basis of not increasing the engine displacement, the non-supercharged engine through the movement of the crankshaft, directly from the atmosphere to suck air, and the turbocharged engine by the turbocharger, to the engine to provide compressed air.

There are five main advantages of turbochargers:

1. Increase the power of the engine. Under the condition that the engine displacement remains the same, the engine can be injected more fuel by increasing the air intake density, so as to increase the power of the engine, and the power and torque of the engine after installing the supercharger should be increased by 20% or 30%. On the contrary, under the same power output requirements, the cylinder 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 and 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 drop in engine power caused by the thin air in 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.

5. It has high reliability and good matching characteristics, and high transient response characteristics.

The turbocharged power has been strengthened, and the speed should be faster, right?