Torque sensor backup in a steer-by-wire system
AssigneeVisteon Global Technologies, Inc.
InventorsMaged Radamis, Bing Zheng
Life of this patent
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Abstract
A steer-by-wire system for use in a vehicle includes a driver interface system. The driver interface system includes a steering mechanism for use by an operator of the vehicle. The steer-by-wire system may allow the operator to steer the vehicle during failures within the driver interface system. When a failure is detected, the movement of the steering mechanism is controlled and torque applied by the operator to the steering mechanism is measured. The vehicle is maneuvered by the steer-by-wire system as a function of the torque applied.
Claims29
A method of operating a steer-by-wire system in a vehicle, the method comprising:
- a) detecting failure within a driver interface system;
- b) sensing a torque applied by a driver of the vehicle to a steering mechanism after detection of the failure;
- and
- c) maneuvering the vehicle as a function of the torque sensed after the failure.
A method of maneuvering a vehicle using a steer-by-wire system when a steering mechanism within the steer-by-wire system is non-responsive to driver commands, the method comprising:
- a) restricting movement of the steering mechanism;
- b) sensing torque applied to the steering mechanism that is indicative of driver commands;
- and
- c) controlling the trajectory of the vehicle as a function of the torque.
A method of maneuverjng a vehicle using a steer-by-wire system, the method comprising;
- a) detecting a failure within a driver interface system of the steer-by-wire system;
- b) initiating a torque steer mode in response to the failure;
- c) enabling a counter-torque to restrict movement of a steering mechanism;
- d) measuring a torque applied to the steering mechanism by a driver of the vehicle;
- e) calculating an estimated position of the steering mechanism as a function of the torque;
- and
- f) adjusting an angular position of a road wheel as a function of the estimated position.
A steer-by-wire system for steering a vehicle, the steer-by-wire system comprising:
- a driver interface system comprising a steering mechanism and a torque sensor coupled to the steering mechanism;
- and
- a controller electrically connected with the driver interface system, the controller operable to detect failure conditions within the driver interface system,
- the controller operable to steer the vehicle during failure conditions as a function of torque measurable by the torque sensor.
Dependencies are inferred from the claim text.