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. 09, 2012
Filed:
Apr. 24, 2008
Tatsuya Tahara, Toyota, JP;
Tatsuya Tahara, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
The half-clutch state decision device of the present invention extracts a high-frequency component and a low-frequency component of an engine rotation speed through filtering when the engine rotation speed has dropped while a vehicle is stopped, and calculates a locus length of the high-frequency component and a locus length of the low-frequency component through accumulation thereof. Furthermore, it is decided whether a half-clutch state exists from a relationship between the calculated locus lengths of the high-frequency and low-frequency components. Specifically, it uses a two-dimensional map (FIG.) having the locus length of the high-frequency component and the locus length of the low-frequency component as parameters and wherein a half-clutch decision region is set, plots the locus length of each component on that two-dimensional map, and decides whether a half-clutch state exists based on whether that plot point is inside the half-clutch decision region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile