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:
Apr. 15, 2008
Filed:
May. 19, 2005
Takeshi Goto, Toyota, JP;
Tatsuo Sugitani, Nishikamo-gun, JP;
Ryuichi Kurosawa, Okazaki, JP;
Toshiyuki Mikida, Anpachi-gun, JP;
Kenji Tozu, Yokkaichi, JP;
Takeshi Goto, Toyota, JP;
Tatsuo Sugitani, Nishikamo-gun, JP;
Ryuichi Kurosawa, Okazaki, JP;
Toshiyuki Mikida, Anpachi-gun, JP;
Kenji Tozu, Yokkaichi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-shi, JP;
Abstract
In a vehicle steering apparatus, front wheels are controlled to be turned by a computer program processing. A displacement/torque conversion sectionconverts a steering angle θ into a steering torque Td that is in relation of exponential function. A torque/lateral-acceleration conversion section, torque/yaw-rate conversion sectionand torque/curvature conversion sectionconvert into an anticipated lateral acceleration Gd, anticipated yaw rate γd and anticipated turning curvature ρd based upon the steering torque Td. Turning angle conversion sectionsandcalculate target turning angles δg, δγ and δρ. A turning angle deciding sectiondecides a target turning angle δd among the target turning angles δg, δγ and δρ according to the detected vehicle speed V. A turning control sectioncontrols the steered wheels to be turned into the target turning angle δd. Herewith, the vehicle steering apparatus of the present invention can turn the vehicle so as to be adapted to a man's perception characteristic in all speed areas with respect to an operation on a steering handle by a driver. Therefore, the driver can easily drive the vehicle in all speed areas.