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. 13, 2009
Filed:
Jul. 05, 2006
Takuya Sakamoto, Akashi, JP;
Takuya Sakamoto, Akashi, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, JP;
Abstract
A method and apparatus for estimating a transmission ratio of a power transmission path defined between input and output shafts is provided. The method includes detecting a rotational speeds of the input and output shafts, calculating a rotational-speed ratio between the detected rotational speeds of the input and output shafts, determining whether or not a difference between the rotational-speed ratio calculated at a certain time and a rotational-speed ratio calculated earlier is within a first threshold, and estimating a value relating to the later rotational-speed ratio to be the transmission ratio and storing the value in a memory if the difference between the rotational-speed ratios is determined to be within the first threshold, while estimating a value relating to the earlier rotational-speed ratio stored in the memory to be the transmission ratio if the difference between the rotational-speed ratios is determined not to be within the first threshold.