THREE-STAGE TURBO-CHARGER SYSTEM AND CONTROL METHOD OF THE SAME

摘要

Disclosed is a three-stage turbocharger system. The disclosed three-stage turbocharger comprises: (i) first and second turbochargers connected to an exhaust and an intake manifold of an engine where a turbine leading end side and both sides of the exhaust manifold are connected through a vent pipe to drive each turbine through an exhaust gas generated in the engine; (ii) a three-stage turbocharger to connect the turbine leading end side and the exhaust manifold through a manifold connected to the vent pipe; (iii) a control valve installed in the manifold to supply the exhaust gas to the vent pipe only by closing the manifold, and supplying the exhaust gas to the vent pipe and the manifold at the same time by opening the manifold; (iv) a control unit to drive only the first and second turbochargers by closing the control valve and controlling the control valve by a revolution count by opening the control valve such that the first, second, and third turbochargers are driven at the same time; and (v) the turbine rear end sides of the first and second turbochargers connected to a first exhaust catalytic converter, and the turbine rear end side of the third turbocharger connected to a second exhaust catalytic converter.