The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2008
Filed:
Sep. 10, 2007
Shuji Fujita, Nishikamo-gun, JP;
Eiji Kasai, Toyota, JP;
Ippei Yamazaki, Toyota, JP;
Junro Yamamoto, Susono, JP;
Yasunori Shintani, Nagoya, JP;
Hideo Kometani, Toyota, JP;
Shuji Fujita, Nishikamo-gun, JP;
Eiji Kasai, Toyota, JP;
Ippei Yamazaki, Toyota, JP;
Junro Yamamoto, Susono, JP;
Yasunori Shintani, Nagoya, JP;
Hideo Kometani, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
JTEKT Corporation, Chuo-ku, JP;
Abstract
When it is determined that the torque output from the electric motor abnormally fluctuates or the torque output from the electric motor varies between clockwise and counterclockwise turning operations of the driver's steering wheel, the steering assist control is continued if the vehicle speed v is equal to or lower than the reference speed v. In this case, the width of the dead band of the steering torque in the assist map used to calculate the target assist torque is increased. Thus, only in a case where the vehicle is moving at a low speed and the driver's steering wheel is operated with a great force, the steering assist torque is produced to alleviate the burden on the driver. In the other cases, the electric motor is stopped to minimize a sense of discomfort in the steering operation.