Variable geometry turbine

摘要

A variable geometry turbine having a inlet passageway defined between a moveable wall member and a radial wall. The moveable wall member is moveable to vary the width of the inlet passageway. At least one bypass passage is formed in one of the moveable wall member and an adjacent annular cavity surface. Upon the moveable wall member and a seal being moved axially relative to one another the bypass passage permits the flow of exhaust gas around the inlet passageway.