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. 16, 2005
Filed:
Sep. 02, 2004
Hiroaki Kato, Hekinan, JP;
Minekazu Momiyama, Chiryu, JP;
Takayuki Ohta, Okazaki, JP;
Yoshiyuki Yasui, Nagoya, JP;
Yuzo Imoto, Aichi-ken, JP;
Hiroaki Aizawa, Anjo, JP;
Eiichi Ono, Toyota, JP;
Yuji Muragishi, Nagoya, JP;
Hiroaki Kato, Hekinan, JP;
Minekazu Momiyama, Chiryu, JP;
Takayuki Ohta, Okazaki, JP;
Yoshiyuki Yasui, Nagoya, JP;
Yuzo Imoto, Aichi-ken, JP;
Hiroaki Aizawa, Anjo, JP;
Eiichi Ono, Toyota, JP;
Yuji Muragishi, Nagoya, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Advics Co., Ltd., Kariya, JP;
Abstract
A first ECUdetects a steering torque applied to a steering system, estimates a self-aligning torque generated in a front wheel on the basis of the steering torque, and estimates a side force for the front wheel on the basis of lateral acceleration and a yaw rate. The first ECUestimates a grip factor ε for the front wheel on the basis of a change of the self-aligning torque to the side force. The first ECUjudges whether the grip factor is below a second OS (oversteer) start threshold value. A second ECUcontrols the transfer ratio according to the vehicle state when the grip factor is less than the second OS start threshold value.