Double turbocharger is one of the ways of turbocharger. Aiming at the turbocharger hysteresis phenomenon of exhaust gas turbocharger, a large or small turbine in series or two turbines in parallel can drive the turbine to rotate at high speed at low engine speed with less exhaust gas to generate enough intake pressure and reduce the turbocharger hysteresis effect.
When the driver stepped on the accelerator pedal, the engine speed changed. Because of the inertia of turbines and compressors, they can not keep up with the change of speed in time. This phenomenon is called "hysteresis phenomenon". "Hysteresis" causes engine delay to increase or decrease output power. The faster you accelerate, the less powerful the engine will feel.
Double turbocharger is a turbocharger system with two independent turbochargers. When the engine works together with two turbochargers, the intake efficiency is greatly improved, the turbocharger effect is more remarkable, and the power performance is greatly improved.
On the other hand, when the engine speed is low, only one low-speed turbine works. At this time, less exhaust gas can drive the turbine to rotate at high speed to generate enough intake pressure. When the engine speed increases, the high-speed turbine continues to enter the state of high turbocharger value, providing a coherent and strong power.
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