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:
May. 21, 2002
Filed:
Aug. 21, 2000
Applicant:
Inventors:
Masami Kondo, Toyota, JP;
Yasunari Nakamura, Nagoya, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16H 6/106 ;
U.S. Cl.
CPC ...
F16H 6/106 ;
Abstract
An apparatus for controlling a vehicle automatic transmission, wherein a moment at which the supply of a pressurized fluid to a hydraulic cylinder for engagement of a frictional coupling device to effect an upshift of the transmission during running of the vehicle in a power-off state is initiated is determined by comparing an estimated synchronizing time required for the transmission input speed to reach a synchronizing speed of a higher-gear position to which the transmission is shifted, with a stored predetermined stroking time required for the piston of the hydraulic cylinder to reach its engaging stroke end.