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:
Sep. 01, 2009
Filed:
Dec. 16, 2004
Takeshi Goto, Toyota, JP;
Ryuichi Kurosawa, Okazaki, JP;
Kenji Tozu, Yokkaichi, JP;
Daisuke Yamada, Nagakute-cho, JP;
Takeshi Goto, Toyota, JP;
Ryuichi Kurosawa, Okazaki, JP;
Kenji Tozu, Yokkaichi, JP;
Daisuke Yamada, Nagakute-cho, JP;
Toyota Jidosha Kobushiki Kaisha, Toyota-shi, JP;
Abstract
In a vehicle steering apparatus of a steer-by-wire system, 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 sectionconverts the steering torque Td into an anticipated lateral acceleration Gd (or anticipated yaw rate γd and anticipated turning curvature ρd) that is in relation of exponentiation function and that serves as a vehicle motion state quantity that can be perceived by a human. A turning angle conversion sectioncalculates a target turning angles δd necessary for the vehicle to move with the anticipated lateral acceleration Gd (or anticipated yaw rate γd and anticipated turning curvature ρd). A turning control sectioncontrols the steered wheels to be turned into the target turning angle δd. A driver turns the handle, feeling the lateral acceleration, and hence, the driver can easily drive the vehicle.