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Title:
CONTROL DEVICE FOR ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2007216899
Kind Code:
A
Abstract:

To provide a control device for an electric power steering device with high safety accurately determining fail/safe by preventing erroneous fail by monitoring not only the difference of a current actual measurement value and a target value but also steering torque.

In the control device for the electric power steering device in which a motor for applying steering assistance force to a steering system based on a current control value operated from a steering assistance instruction value operated based on steering torque and vehicle speed and a motor current value is controlled, a fail determination means for judging and determining the fail state based on the steering torque and the difference of the steering assistance instruction value and the motor current value is provided.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
WATANABE MASAHITO
Application Number:
JP2006041839A
Publication Date:
August 30, 2007
Filing Date:
February 20, 2006
Export Citation:
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Assignee:
NSK LTD
International Classes:
B62D6/00; B62D5/04; H02P27/06; B62D101/00; B62D119/00
Domestic Patent References:
JP2005088861A2005-04-07
JPH07329803A1995-12-19
JP2002234457A2002-08-20
JP2000318633A2000-11-21
Attorney, Agent or Firm:
Yuzo Agata
Sadayoshi Igarashi
Susumu Kitano
Daisuke Ishii