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:
Oct. 17, 2000
Filed:
Jan. 26, 1998
Applicant:
Inventors:
Hiroyuki Furusho, Kanagawa, JP;
Hiroshi Mouri, Yokohama, JP;
Assignee:
Nissan Motor Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
702167 ; 701 28 ; 701 41 ;
Abstract
A road curvature estimating apparatus for a vehicle includes a vehicle attitude detector which detects an attitude of the vehicle with respect to a road, a front-and-rear wheel steer-angle detector, a vehicle speed detector and a road curvature calculator. The road curvature calculator calculates a curvature of a road ahead of the vehicle on the basis of the measured vehicle attitude, the measured vehicle speed and the measured steer angles of the front and rear wheels by means of a state estimation of modern control theory. A controller executes a control of an automatic steering mechanism on the basis of the road curvature calculated.