Title:
ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/062145
Kind Code:
A1
Abstract:
Provided is an electric power steering device (100) wherein mechanical friction is electrically provided. A steering torque value (VT3) is detected by a steering torque sensor (30) according to the operation of a steering wheel (2). An assist current value (Ia) is calculated by an assist control section (51) on the basis of the aforementioned steering torque value (VT3). A target current value (Itar) based on the aforementioned assist current value (Ia) is to be determined. For this purpose, with the aim of providing friction with regard to the operation of the steering wheel (2), there are provided a friction control section (54) and a friction torque value / current value conversion section (55). Thereby a corrected steering torque value (VT3 - VTfr) is generated, and furthermore, a second corrected target current value (Ia2) is created, the aforementioned corrected steering torque value (VT3 - VTfr) being obtained by correcting the steering torque value (VT3) by means of a friction torque value (VTfr), and the aforementioned second corrected target current value (Ia2) being obtained by correcting a first corrected target current value (Ia1) by means of a friction current value (Ifr). Subsequently, the target current value (Itar) is generated, resulting in a motor (11) being subjected to driving control.
Inventors:
ONIWA YOSHIHIRO (JP)
SHIMIZU YASUO (JP)
YAMAWAKI SHIGERU (JP)
SUGAMATA KAZUSHIGE (JP)
YONEDA ATSUHIKO (JP)
SHIMIZU YASUO (JP)
YAMAWAKI SHIGERU (JP)
SUGAMATA KAZUSHIGE (JP)
YONEDA ATSUHIKO (JP)
Application Number:
PCT/JP2010/070322
Publication Date:
May 26, 2011
Filing Date:
November 16, 2010
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
ONIWA YOSHIHIRO (JP)
SHIMIZU YASUO (JP)
YAMAWAKI SHIGERU (JP)
SUGAMATA KAZUSHIGE (JP)
YONEDA ATSUHIKO (JP)
ONIWA YOSHIHIRO (JP)
SHIMIZU YASUO (JP)
YAMAWAKI SHIGERU (JP)
SUGAMATA KAZUSHIGE (JP)
YONEDA ATSUHIKO (JP)
International Classes:
B62D6/00; B62D5/04; B62D101/00; B62D113/00; B62D117/00; B62D119/00
Foreign References:
| JP2006290206A | 2006-10-26 | |||
| JP2000103349A | 2000-04-11 | |||
| JPH09132155A | 1997-05-20 | |||
| JP2001219863A | 2001-08-14 | |||
| JP2002037109A | 2002-02-06 | |||
| JP2003320951A | 2003-11-11 | |||
| JP2005205998A | 2005-08-04 | |||
| JP2005306205A | 2005-11-04 | |||
| JP2008230537A | 2008-10-02 |
Other References:
See also references of EP 2502805A4
Attorney, Agent or Firm:
CHIBA Yoshihiro et al. (JP)
Takehiro Chiba (JP)
Takehiro Chiba (JP)
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