| 摘要 |
Provided is a turbocharger system capable of ensuring a sufficient EGR amount in all operating conditions, and reducing NOx emission from an engine. A turbocharger system for an engine includes an EGR controller that recirculates a part of exhaust gas discharged from an engine to an intake side, and a turbocharger. In the turbocharger system, the turbocharger is provided with a power-assisted turbocharger including an electric motor (2c) that assists a drive force of a compressor (2b). The EGR controller controls an amount of exhaust gas recirculated to the intake side so as to inhibit the generation of NOx regardless of an amount of oxygen necessary for combustion of the engine. An electric motor control unit (23) is provided to drive the electric motor (2c), by the control of the EGR controller, when the amount of oxygen necessary for the combustion of the engine is deficient. |
