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:
Aug. 14, 2007
Filed:
Apr. 04, 2005
Hiroaki Kato, Hekinan, JP;
Shinji Takeuchi, Okazaki, JP;
Minekazu Momiyama, Chiryu, JP;
Akihiro Ohno, Okazaki, JP;
Tsuyoshi Murakami, Handa, JP;
Hiroaki Kato, Hekinan, JP;
Shinji Takeuchi, Okazaki, JP;
Minekazu Momiyama, Chiryu, JP;
Akihiro Ohno, Okazaki, JP;
Tsuyoshi Murakami, Handa, JP;
JTEKT Corporation, Osaka, JP;
Abstract
In a steering system, a transmission ratio Rwhich is determined in dependence on the vehicle speed by reference to a transmission ratio decision map is multiplied with a first transmission ratio alteration gain gwhich is determined in dependence on the distribution of a traveling drive torque from an engineto front wheelsand rear wheels, thereby to alter the ratio Rof steering torque distribution from a steering handleto the front wheels, whereby the variation of the steering feeling due to an increase or decrease in the distribution of the traveling drive torque to the front wheelscan be suppressed. Further, the transmission ratio Ris multiplied with a second transmission ratio alteration gain gwhich is determined in dependence on the gradient of the road surface by reference to a second transmission ratio alteration map, thereby to alter the transmission ratio R, whereby the variation of the steering feeling due to the variation of the gradient can also be suppressed.