Systems and methods for an electric steering system
AssigneeDana Italia S.R.L.
InventorsIdris POONAWALA, Sudatta KARMARKAR, Paresh JOSHI
Life of this patent
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Abstract
Methods and systems are provided for a steer-by-wire system. In one example, a steer-by-wire system comprises an electric motor coupled to a steering axle via a bevel gear set, where a rotor of the electric motor is perpendicular to the steering axle, and the bevel gear set comprises a first bevel gear and a second bevel gear. The steer-by-wire system includes an overload protection arrangement, where the second bevel gear is normally coupled to a ball screw nut via a plurality of locking pins, the plurality of locking pins disengaging from the second bevel gear and allowing slipping of the ball screw nut in response to an external impact load acting on the ball screw nut exceeding a threshold.
Claims20
A steer-by-wire system comprising:
- an electric motor coupled to a steering axle via a bevel gear set, where a rotor of the electric motor is perpendicular to the steering axle, and the bevel gear set comprises a first bevel gear and a second bevel gear;
- and,
- an overload protection arrangement, where the second bevel gear is normally coupled to a ball screw nut via a plurality of locking pins, the plurality of locking pins disengaging from the second bevel gear and allowing slipping of the ball screw nut in response to an external impact load acting on the ball screw nut exceeding a threshold.
A method for a vehicle having a steer-by-wire system comprising an electric motor mounted perpendicular to a steering axle via a bevel gear set coupled to a ball screw arrangement, the method comprising:
- driving the bevel gear set and the ball screw arrangement with the electric motor to provide steer-by-wire operation and during the steer-by-wire operation,
- disconnecting the bevel gear set from the ball screw arrangement in response to an external impact load increasing above a threshold.
A vehicle system comprising:
- an electric motor coupled to a steering axle via a bevel gear set, where a rotor of the electric motor is perpendicular to the steering axle, and the bevel gear set comprises a first bevel gear and a second bevel gear;
- and,
- an overload protection arrangement, where the second bevel gear is normally coupled to a ball screw nut via a plurality of locking pins, the plurality of locking pins disengaging from the second bevel gear and allowing slipping of the ball screw nut in response to an impact load acting on the ball screw nut exceeding a threshold.
Dependencies are inferred from the claim text.