| 摘要 |
A variable geometry system for a turbocharger includes a sliding piston (16) disposed within a turbine housing (12) between a primary exhaust gas volute (25) and turbine blades (14). The sliding piston (16) is axially displaceable within the turbine housing (12) to increase or decrease the volumetric flowrate of exhaust gas to the turbine. The sliding piston (16) is positioned by an actuator having reciprocating movement translated through a rotating sleeve (28) with a first pin (32) engaging a helical slot (34) for axial motion of the piston (16) and a second pin (38) engaging an alignment slot for maintaining axial alignment of the piston (16).
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