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:
Jun. 25, 1991
Filed:
Aug. 22, 1988
Kazuhiko Sato, Katsuta, JP;
Shizuhisa Watanabe, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering Co., Ltd., Katsuta, JP;
Abstract
An automatic transmission apparatus for vehicles include a continuously variable transmission of belt type, and a control unit supplied with a plurality of data relating to a vehicle. The control unit computes output data on the basis of the input data, and generates control signals for changing a pulley width of the continuously variable transmission of belt type, for changing an effective diameter of the pulley and for substantially continuously controlling the transmission ratio on the basis of the output data. The control unit comprises a control signal generator for deciding whether the vehicle is started or not and for generating a control signal to temporarily narrow the pulley width when it is decided that the vehicle is started.