| 摘要 |
A turbine rotation control device of a variable geometry turbocharger system is provided to improve a separation phenomenon occurring in an airfoil vane and to improve performance of an engine, by controlling a flow of exhaust gas according to an operation zone of the vehicle. A turbine rotation control device of a variable geometry turbocharger system comprises a first rotating band(610) formed in a circular shape having at least one hole and installed in the circumferential direction of a ring plate; a second rotating band(620) formed in the same shape as the first rotating band and installed with clearance to the extent of predetermined distance from the circumferential inside of the first rotating band; a control part producing a drive control signal to control the corresponding degree of holes of the first rotating band and the second rotating band according to an operation zone of the vehicle wherein the variable geometry turbocharger system is mounted; and a nozzle lever(630) installed with clearance to the extent of predetermined distance from the second rotating band from the circumferential inside of the first rotating band. The nozzle lever is driven according to input of the drive control signal supplied from the control part and the nozzle lever rotates the second rotating band in a predetermine direction.
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