Turbocharger having pneumatic actuator with pilot valve

Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine

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Details

1374895, F02D 2300, F16K 31126

Patent

active

054872731

ABSTRACT:
A pneumatic actuator for controlling the wastegate valve of an exhaust gas driven turbocharger includes a pilot piston which is responsive to boost pressure to open only when a desired boost pressure is attained. Accordingly, premature opening of the wastegate valve is avoided because the main actuator piston is maintained at atmospheric pressure until the desired actuating pressure is attained.

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