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:
Jan. 18, 2000
Filed:
Mar. 31, 1997
Mizuho Sugiyama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A gear shift control device of an automatic transmission of a vehicle, including a slip angle estimator for estimating a slip angle of at least one of a pair of drive wheels; a slip ratio estimator that estimates the slip ratio of the one drive wheel; a determiner that determines an upshift of the automatic transmission when the absolute value of the estimated slip ratio is greater than a threshold value; and a upshift executor for executing the upshift automatic transmission according to the upshift determined by the determiner, wherein the determiner determines the upshift to be of a greater number of stage within an available range against the absolute value of the estimated slip ratio according as the absolute value of the estimated slip angle is greater.