Two speed supercharger drive

摘要

A two speed supercharger system (20) for an internal combustion engine. The supercharger system includes a supercharger pump (40) that is driven by the engine via a gear box (34). The gear box includes two planetary gear sets (54, 70) and a controllable clutch (66). A controller (35) selectively activates the clutch to control the transition between the two speeds to assure a smooth transition without sudden changes in torque output.