Electric power steering apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 22, 2000
Grant Date -
N/A
app pub date -
Jul 14, 1998
filing date -
Jul 25, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control unit of an electric power steering apparatus has an overload preventing part having the function of decreasing the current supplied to a motor of the electric power steering apparatus when a state such that a steering torque acting on the steering system is above a predetermined value and the steering speed of the steering system is below a predetermined value has continued for a predetermined time or having the function of immediately decreasing the current supplied to the motor when the steering speed of the steering system is below a predetermined value and the steering torque acting on the steering system is above a first predetermined value and decreasing the current supplied to the motor when a state such that the steering speed is below a predetermined value and the steering torque is above a second predetermined value smaller than the first predetermined value has continued for a predetermined time. As a result, a stable steering assist torque can be supplied from the motor even when a steering operation is carried out slowly and an excessive current is not continuously supplied to the motor when the steering system has reached a maximum steering angle position.
First Claim
Family
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Cited Art Landscape
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