| 摘要 |
A turbocharger includes a variable area turbine nozzle having a plurality of nozzle vanes (234) spaced circumferentially about the turbine and in the inlet (230) through which exhaust gas from the engine is received into the turbine. A controller (84) with a housing (264) and a piston structure (268, 270) controls the position of the nozzle vanes (234) to vary the flow velocity of exhaust gases into the turbine. A rod (86) is attached to the vanes (234) and has one end attached to the piston structure (268, 270) of the controller (84). The housing (264) defines two cylinders (264, 266) with a piston (268, 270) in each cylinder (264, 266). The rod (86) is attached to the piston (270) having a smaller cross-sectional area than the other piston (268). Further spring means (276, 278) and vent means (88a, 89) are provided. |
