Turbocharger selection and energy analysis of MGU-H for commercial vehicles

This paper presents the Regenerative turbocharging which is basically electrically assisted turbocharging. This system aims to improvise two primary parameters of the turbocharger; namely performance and turbocharging. In this system, an electric motor coupled with a battery is added to the standard turbo setup, the motor is attached to the same shaft as the turbo impellers. When there is wastegate exhaust, the turbo rotates the motor, thus making it act like a generator which in turn charges the battery. This energy can later be used to rotate the motor, which will, in turn, boost the turbo, in situations of turbo lag, and low RPM, in the low end. The proposed system thus improves performance by eliminating turbo lag and also makes the engine energy efficient.