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US 6,745,866 B2Granted
Soft-disable damping for electric power steering
AssigneeDelphi Technologies, Inc.
InventorsMark A. Norman, Julie A. Kleinau
Life of this patent
Estimating the term…
Abstract
An electric power steering system includes a motor and a soft-disable controller in signal communication with the motor for reducing the abruptly increased reaction torque felt by a driver when an assist torque is abruptly disabled.
Claims6
A method for controlling a motor in an electrical power steering system, comprising:
- providing an assist torque with said motor;
- recognizing a critical fault related to said provision of assist torque;
- disabling said assist torque in response to said fault recognition;
- determining the rotational velocity of said motor;
- providing a limited damping torque in response to said disabling of assist torque;
- timing the duration of said provision of limited damping torque;
- and
- commanding said limited damping torque in response to at least one of said timing and said determining.
5 more elements
Dependencies are inferred from the claim text.