ELECTRIC STEERING MOTOR WITH INTERNAL CIRCUIT BOARD

摘要

A vehicle steering system (10) includes a pinion (30) and a steering member (14) movable axially to turn steerable wheels. The steering member (14) has a rack portion (34) in engagement with the pinion (30) and a screw portion (38). An electric motor (130) includes a rotor (134) and a stator (132). The screw thread portion (38) extends axially through the motor (130). A ball nut (116) rotatable with the rotor (134) is associated with the screw thread portion (38) for effecting axial movement of the steering member (14) in reponse to rotation of the rotor. An electronic control unit (148) for the motor (130) includes a circuit board (150) and a plurality of electronic components mounted on the circuit board. The circuit board (150) has a non-planar configuration and at least partially encircles a portion of the steering member (14) at a location spaced axially from the electric motor (130).