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:
Mar. 21, 2000
Filed:
Dec. 15, 1997
Masahiro Takiguchi, Shizuoka, JP;
Jatco Corporation, Fuji, JP;
Abstract
An upshift control apparatus for use in an automatic transmission having first and second torque transmitting elements operable on fluid pressure between engaged and released conditions for controlling at least the fluid pressure to the second element to an initial value to engage the second element to effect an upshift from a current gear ratio to a higher traget gear ratio while releasing the first element without the use of a one-way clutch to release the first element while synchronizing rotation. Engine racing is detected after an upshift is detected when the detected gear ratio is equal to or greater than a threshold value greater than a gear ratio existing before the upshift. The fluid pressure supplied to the second element is increased to prevent the engine racing when the engine racing is detected at the early stage of the upshift before the inertia phase of the upshift starts.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile