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:
Feb. 20, 2007
Filed:
Dec. 10, 2004
Masahiro Asano, Kariya, JP;
Eiji Takemoto, Obu, JP;
Masahiro Asano, Kariya, JP;
Eiji Takemoto, Obu, JP;
Denso Corporation, Kariya, JP;
Abstract
If a user presses a clutch pedal to perform gear-shifting operation while a vehicle is traveling, a clutch disc, which has been engaged with a flywheel rotating with an engine, is brought to partial clutch engagement and slides on an end surface of the flywheel to generate friction. Thus, a first phenomenon in which a decreasing rate of the engine rotation speed rapidly increases occurs. Then, a second phenomenon in which the clutch disc is completely disengaged from the flywheel to eliminate the friction and the decreasing rate of the engine rotation speed returns to an original state occurs. If the first and second phenomena are detected successively when neither an engine side nor a power transmission system side transmits power for varying an engine rotation speed, it is determined that the clutch disc is disengaged.