What are Turbocharger Accessories? It is a beautiful air compressor installed on the exhaust pipe of the engine. The exhaust gas from the engine is used to push the turbine in the turbine chamber to rotate, and the turbine drives the coaxial impeller to rotate. In this way, the impeller compresses the air coming in from the air filter and pressurizes it into the cylinder. As the air density into the cylinder increases, more fuel can be fully burned, thus greatly improving the engine power and reducing fuel consumption.
After the car engine is cold started, it is not allowed to refuel in a hurry. It should be idled for three to five minutes. This is to increase the oil temperature and improve the activity function, so that the turbocharger accessory bearing can be fully smooth. This is particularly important in winter. Otherwise, the turbocharger rotor shaft, bearing, seal ring and other parts are easy to wear due to lack of oil. For vehicles with a long parking time (more than a week), the supercharger must be smoothed before the engine is restarted. The method is to loosen the turbocharger oil inlet pipe joint and pour clean oil with the same trademark as the oil pan into the oil inlet. In addition, when replacing the smooth oil, cleaning or replacing the oil filter, fill the turbocharger parts with smooth oil according to the above method, and then start the vehicle.
In addition, it is necessary to avoid long-term idling operation of turbocharger accessory engine, otherwise, due to low oil pressure during idling, the floating of turbocharger rotor shaft will be affected, resulting in early wear of rotor shaft, bearing and sealing ring. Under the effect of Turbocharger Accessories, the air volume entering the combustion chamber fluctuates greatly. Under the condition of constant volume of engine combustion chamber, it is equivalent to the improvement of compression ratio, which makes the operation intensity of engine greatly higher. Turbocharged engine high machining accuracy, strict assembly skills. All these determine that the turbocharged engine is in the condition of high temperature, high speed, high power, high torque and low emission. Therefore, in the selection of turbocharged engine oil, it is necessary for the oil used to have outstanding anti-wear, high temperature resistance, and simple establishment of high-strength oil film. Today's component oil or semi-component oil can meet this requirement, so in addition to using the original regular oil, high-quality smooth oil such as component oil and semi-component oil can also be selected.
1.jpg
The power of Turbocharger Accessories comes from high temperature and high pressure exhaust gas, so it will not consume additional engine power, which is completely different from the situation that supercharger will consume 7% of engine power. In addition, the turbocharger accessories are directly connected to the exhaust pipe and have a compact structure.
"The greater the pressure, the greater the power." this is the true portrayal of turbocharging. The supercharging value of supercharger mentioned in the last part is generally below 0.5bar (the data will be in bar in the future), and with the increase of speed, the more power the engine will consume. However, turbocharging has no such defects. Instead, it will be more powerful due to the increase of speed. With the increase of engine speed, the exhaust pressure will be increased, and the impact force of turbine will be greater. The speed of the whole rotor will rise rapidly, and the compressor impeller can also rotate at high speed.
Turbocharging is very simple, beyond the 1 bar boost value, for example, Golf R can reach 1.3. Many refitted vehicles can easily achieve a high supercharging value of 1.5 after cylinder block strengthening and computer tuning. For example, the original factory supercharging value of STI of the 10th generation cheetah is 0.9, and it is easy to reach 1.5 after adjusting the engine computer. However, most of the household non functional vehicles we buy, such as golf 1.4T and regal 2.0T, are much lower than 1, generally between 0.3 and 0.5. In this way, the functions, fuel consumption and engine life can be balanced. It can be seen that the turbocharging is much higher than the supercharging value of supercharging, and the corresponding engine power improvement is also greater.
High temperature is the biggest killer of Turbocharger Accessories
The simple structure of Turbocharger Accessories, no consumption of engine power and high supercharging value lead to the strong advantages of turbocharging. But the principle of turbocharging makes it one of the biggest dangers: high temperature. It is this danger that causes turbocharging not to enter the civil domain.
There are several sources of heat. The first one is the exhaust gas temperature. As we have mentioned before, the exhaust temperature of gasoline engine can reach 750-900 ℃ under full load operation, and nearly 700 ℃ under normal operation condition. The exhaust gas itself will cool down as it propels the turbine to rotate. Where does this temperature go? It is absorbed by the turbine blades.