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. 28, 1998
Filed:
Jul. 10, 1996
Frank de Schepper, Venusberg, BE;
Kenji Suzuki, Okazaki, JP;
Aisin AW Co., Ltd., , JP;
Abstract
An automatic transmission control system includes a frictional engagement element formed of alternating radially inner and outer thin plates for selectively transmitting a torque. The control system further includes a hydraulic servo having a piston which selectively engages/disengages the frictional engagement element responsive to an oil pressure. An electric characteristic detector detects (monitors) an electric characteristic which changes with change in the apply force of the frictional engagement element; and an apply force control unit controls the apply force of the frictional engagement element. The electric characteristic detector includes a signal generator for generating an electric signal in accordance with the relative positions of two electrically conductive members, which move as the frictional engagement element is engaged/disengaged. The apply force control unit includes a hydraulic controller for controlling the oil pressure fed to the hydraulic servo, on the basis of the electric signal received from the signal generator.