Abstract: A linear actuator for a variable-geometry member of a turbocharger includes a piston/rod assembly that can axially translate and also pivot to a limited extent. A permanent magnet is mounted in a fixed position within the actuator. A non-magnetized flux carrier is mounted in the piston/rod assembly, and its movement alters the magnetic field of the magnet. A Halls effects sensor detects the magnetic field and the signals produced by the sensor are used for determining axial position of the piston/rod assembly.

Abstract: A linear actuator for a variable-geometry member of a turbocharger includes a piston/rod assembly that can axially translate and also pivot to a limited extent. A permanent magnet is mounted in a fixed position within the actuator. A non-magnetized flux carrier is mounted in the piston/rod assembly, and its movement alters the magnetic field of the magnet. A Halls effects sensor detects the magnetic field and the signals produced by the sensor are used for determining axial position of the piston/rod assembly.

Abstract: A linear actuator for a variable-geometry member of a turbocharger comprises a fixed portion and a movable portion that can undergo primary translational movement along a longitudinal axis and secondary rotational movement about one or more other axes. A sensor assembly is included, comprising a permanent magnet fixedly mounted on the movable portion and a sensor fixedly mounted relative to the fixed portion and adjacent to the magnet. The sensor is operable to sense magnetic flux density components of the magnet along each of three mutually orthogonal axes. A position of the magnet along the longitudinal axis is determinable from these magnetic flux density components.