Twin-turbocharging is one of the methods of turbocharging, with specific details as follows: 1. Twin-turbocharging is designed to address the turbo lag phenomenon in exhaust turbocharging by connecting one large and one small turbocharger in series or two identical turbochargers in parallel. At low engine speeds, a small amount of exhaust gas can drive the turbocharger to rotate at high speed, generating sufficient intake pressure and reducing the turbo lag effect. 2. When the driver presses the accelerator pedal, the engine speed changes. Due to the inertia of the turbine and compressor, they cannot immediately keep up with this speed change, a phenomenon known as "lag." This "lag" causes a delay in the engine's ability to increase or decrease power output. As a result, the more sudden the acceleration, the more the engine feels sluggish. 3. Twin-turbocharging is a forced induction system that uses two independent turbochargers. When both turbochargers work together, the intake efficiency is significantly improved, the turbocharging effect is more pronounced, and the engine's power is greatly enhanced. 4. At low engine speeds, only one low-speed turbocharger is active, where a small amount of exhaust gas can drive this turbocharger to rotate at high speed, generating sufficient intake pressure. As the engine speed increases, the high-speed turbocharger kicks in, maintaining a high boost state to provide continuous strong power. Thus, twin-turbocharging technology not only improves engine power but also mitigates the "turbo lag" phenomenon.
