VTG internal by-pass

The invention provides a method for increasing peak flow in a variable geometry turbine turbocharger comprising: by-passing fluid flow to a turbine impeller by forming at least one internal by-pass passage through at least one of a lower vane ring of a vane pack assembly or a turbine housing below the lower vane ring; providing a first end of a vane component within the at least one internal by-pass passage; and using the first end of the vane component as a rotary valve to control fluid flow through the at least one internal by-pass passage. 种用于增大可变几何形状涡轮式涡轮增压器中的峰值流的方法，该方法包括：通过穿过叶片组组件的下部叶片环或下部叶片环下方的涡轮壳体的至少个形成至少个内部旁通通道来使得流体流旁通至涡轮叶轮；将叶片部件的第端设置在至少个内部旁通通道内；以及将叶片部件的第端用作旋转阀以控制穿过至少个内部旁通通道的流体流。