Failure detection device and electric power steering apparatus
AssigneeHitachi Astemo, Ltd.
InventorHiroaki Kurihara
Life of this patent
Estimating the term…
Abstract
The failure detection device includes: a failure detection unit configured to detect failure of a torque detection unit, the torque detection unit detecting torque applied to a rotary shaft with plural torque sensors; and a controller configured to control drive of a motor such that the motor outputs continuous torque in an event that the failure detection unit detects failure of the torque detection unit, the continuous torque continuously generating torque that is, if at least one of the plural torque sensors is working properly, detectable by the at least one of the plural torque sensors.
Claims18
A failure detection device comprising:
- a failure detection unit configured to detect failure of a torque detection unit, the torque detection unit detecting torque applied to a rotary shaft with a plurality of torque sensors;
- and
- a controller configured to control drive of a motor such that the motor outputs continuous torque in an event that the failure detection unit detects failure of the torque detection unit, the continuous torque continuously generating torque that is, if at least one of the plurality of torque sensors is working properly, detectable by the at least one of the plurality of torque sensors, wherein
- the controller controls drive of the motor so as to inform the failure of the torque detection unit with vibrations caused by the continuous torque so that vibrations are given to a steering wheel of a vehicle, and
- the controller sets frequency of the vibrations caused by the continuous torque in a range from 5 Hz to 7 kHz.
An electric power steering apparatus comprising:
- a torque detection unit configured to detect steering torque with a plurality of torque sensors;
- a failure detection unit configured to detect failure of the torque detection unit;
- and
- a controller configured to control drive of a motor such that the motor outputs continuous torque in an event that the failure detection unit detects failure of the torque detection unit, the continuous torque continuously generating torque that is, if at least one of the plurality of torque sensors is working properly, detectable by the at least one of the plurality of torque sensors, wherein
- the controller controls drive of the motor so as to inform the failure of the torque detection unit with vibrations caused by the continuous torque so that vibrations are given to a steering wheel of a vehicle, and
- the controller sets frequency of the vibrations caused by the continuous torque in a range from 5 Hz to 7 kHz.
A failure detection device comprising:
- a controller configured to control drive of a motor such that the motor outputs continuous torque, the continuous torque continuously generating torque detectable by a torque sensor configured to detect torque applied to a rotary shaft;
- and
- a failure detection unit configured to detect failure of the torque sensor on a basis of whether the torque sensor detects torque applied to the rotary shaft, the torque resulting from the continuous torque in an event that the controller controls drive of the motor such that the motor outputs the continuous torque, wherein
- the controller controls drive of the motor so as to inform the failure of the torque detection unit with vibrations caused by the continuous torque so that vibrations are given to a steering wheel of a vehicle, and
- the controller sets frequency of the vibrations caused by the continuous torque in a range from 5 Hz to 7 kHz.
Dependencies are inferred from the claim text.