Turbocharger actuator with rolling O-ring

摘要: An actuator for a turbocharger includes housing having chamber therein, piston assembly rod and secured to axial movement therewith, spring operatively interposed between the urging upward within chamber. A hollow retainer is mounted extends into alongside piston. The has housed portion generally cupped shape with cavity therein receiving pressure signal from turbocharger. axially spaced first second peripheral protrusions thereon. O-ring mounts on in engagement simultaneously. rolls response resulting relative piston, thus decreasing hysteresis actuator.