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:
Apr. 17, 2007
Filed:
Feb. 23, 2005
Kiyoharu Takagi, Okazaki, JP;
Kiyoharu Takagi, Okazaki, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-Shi, Aichi-Ken, JP;
Abstract
A hydraulic pressure characteristic value setting method for an automatic transmission comprises processes; disengaging one of friction engaging elements, transmitting turbine rotation to one side of each of the friction engaging elements, securing the other side of each of the friction engaging elements, detecting variations of speed of the turbine rotation by means of a turbine rotation sensor, executing a learning of a hydraulic pressure characteristic value in accordance with at least variations in the speed of turbine rotations when a friction engaging element starts to be engaged, and disengaging the engaged friction engaging element when a predetermined guard condition has been fulfilled.