The power of the turbocharger comes from high-temperature and high-pressure exhaust gas, so it does not consume additional engine power. This is completely different from the situation where a supercharger consumes 7% of the engine’s power. In addition, the turbocharger is directly connected to the exhaust pipe and has a compact structure.
“The greater the pressure, the greater the power.” This is a true portrayal of turbocharging. Generally speaking, the supercharger boost value is below 0.5bar, and as the speed increases, it consumes more engine power. But turbocharging has no such shortcomings at all. On the contrary, it will become more powerful as the speed increases. Because as the engine speed increases, the exhaust pressure will become larger and larger, and the force impacting the turbine will also be greater. The speed of the entire rotor will rise rapidly, and the compressor impeller can also rotate at high speed.
Turbo boost can easily exceed the 1 bar boost value. Many modified cars can easily achieve a high boost value of 1.5 after cylinder strengthening and computer tuning. For example, the original boost value of some cars is 0.9, and after adjusting the engine computer, it can easily reach 1.5. However, the boost value of the non-performance cars we usually buy for home use is far lower than 1, usually between 0.3-0.5, which can balance performance, fuel consumption and engine life. Turbocharging has a much higher boost value than supercharging, and accordingly the engine power increase is greater.
The turbocharger has a simple structure, does not consume the engine’s own power, and has a high boost value. These factors give turbocharging great advantages. However, the principle of turbocharging makes it have a major hidden danger: high temperature. The main source of heat is the exhaust gas temperature. The exhaust temperature of a gasoline engine can reach 750-900 degrees when working at full load, and is nearly 700 degrees under normal operating conditions. These exhaust gases will cool down as they drive the turbine to rotate. Where does this temperature go? It is absorbed by the turbine blades.
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Post time: Jan-23-2024