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:
Aug. 14, 2018
Filed:
Aug. 27, 2014
Jatco Ltd, Fuji-shi, Shizuoka, JP;
Kouichi Kotsuji, Numazu, JP;
Kenji Hattori, Kanagawa, JP;
JATCO Ltd, Fuji-Shi, JP;
Abstract
Oil pressure controller for an automatic transmission produces a pre-charge shelf pressure supplied to a starter clutch by rapidly decreasing a command hydraulic pressure to the starter clutch after temporarily rapidly increasing the command hydraulic pressure, also produces a capacity adjustment pressure (Pbor Pb) of the starter clutch by gradually increasing the hydraulic pressure from a decrease point of the pre-charge shelf pressure (Pa), when a selecting operation is made from N-range to D-range. By changing capacity adjustment pressure (Pbor Pb) according to brake-operating/nonoperating state, capacity adjustment pressure (Pb) in the brake-nonoperating state is set to be higher than capacity adjustment pressure (Pb) in the brake-operating state by an offset hydraulic pressure amount. With this, when the selecting operation is made from N-range to D-range, in the brake-operating state, selection shock of the starter clutch can be reduced. In the brake-nonoperating state, good vehicle startability can be achieved.