Method for determining the rack-and-pinion position in a steering system having an electric servomotor
AssigneeRobert Bosch GmbH
InventorMichael Sprinzl
Life of this patent
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Abstract
A method for determining a rack-and-pinion position in a steering system having an electric servomotor and a rack includes determining kinematic changes in a transmission path between the servomotor and the rack. The method further includes generating an event signal when a kinematic or dynamic rotor size of the servomotor exceeds an assigned threshold value.
Claims14
A method for determining a rack-and-pinion position in a steering system having an electric servomotor and a rack, the method comprising:
- determining kinematic changes in a transmission path between the servomotor and the rack;
- generating an event signal when a kinematic or dynamic rotor size of the servomotor exceeds an assigned threshold value;
- and
- preventing an activation of automatic driving of a vehicle including the steering system due to the event signal.
A steering system comprising:
- an electric servomotor;
- a rack;
- a control device configured to:
- determine kinematic changes in a transmission path between the servomotor and the rack;
- and
- generate an event signal when a kinematic or dynamic rotor size of the servomotor exceeds an assigned threshold value;
- a steering shaft kinematically coupled to the rack;
- and
- a gear mechanism configured to introduce a servo torque onto the rack.
A method for determining a rack-and-pinion position in a steering system having an electric servomotor, a steering shaft kinematically coupled to a rack, and a gear mechanism configured to introduce a servo torque onto the rack, the method comprising:
- evaluating at least one signal of at least one of a rotor position sensor of the electric servomotor and a torque sensor of the electric servomotor with a control device;
- identifying the evaluated at least one signal as associated with a rotational speed of a rotor of the electric servomotor, or a torque generated by the electric servomotor, which exceeds an assigned kinematic or dynamic rotor size of the electric servomotor with the control device;
- and
- generating with the control device an event signal indicating that a kinematic or dynamic rotor size of the electric servomotor exceeds an assigned threshold value based upon the identification.
Dependencies are inferred from the claim text.