Automatic transmission control system
    4.
    发明授权
    Automatic transmission control system 失效
    自动变速器控制系统

    公开(公告)号:US5772550A

    公开(公告)日:1998-06-30

    申请号:US626067

    申请日:1996-04-01

    摘要: A control system for an automatic transmission having a transmission gear mechanism and a plurality of friction coupling elements which are selectively locked and unlocked with hydraulic oil to change power transmission paths to place the automatic transmission into desired available gears, a first one of the friction coupling elements having a locking pressure chamber and an unlocking pressure chamber and being locked when operating oil is supplied into only the locking pressure chamber and unlocking when operating oil is coincidentally supplied into the locking pressure chamber and the unlocking pressure chamber, and a second one of the friction coupling elements having a locking/unlocking pressure chamber in communication, with the unlocking pressure chamber of the first friction coupling element and being locked only when operation oil is supplied into the locking/unlocking pressure chamber. The control system includes a transition level control for controlling a pressure level of transitional pressure of operating oil increasing in pressure level while being supplied to the locking/unlocking pressure chamber of the second friction coupling element during a first specified gear shift with a first friction coupling element and the second friction coupling element are simultaneously unlocked and locked, respectively, and decreasing while being discharged from the locking/unlocking pressure chamber of the second friction coupling element during a second specific gear shift wherein the first friction coupling element and the second friction coupling element are simultaneously locked and unlocked, respectively, and a transitional duration control for controlling a duration time of the transitional pressure during any one of the first and second specific gear shifts.

    摘要翻译: 一种用于自动变速器的控制系统,其具有变速齿轮机构和多个摩擦联接元件,所述多个摩擦联接元件被选择性地用液压油锁定和解锁,以改变动力传递路径以将自动变速器置于所需可用的齿轮中,第一个摩擦联接 具有锁定压力室和解锁压力室的元件,并且当操作油被仅供给到锁定压力室时被锁定,并且当操作油被合适地供应到锁定压力室和解锁压力室中时解锁,并且第二个 具有与第一摩擦联接元件的解锁压力室连通的锁定/解锁压力室的摩擦联接元件,并且仅当操作油被供应到锁定/解锁压力室时才被锁定。 控制系统包括过渡电平控制,用于控制在第一特定变速期间在第一摩擦联接器中将第二摩擦联接元件的第二摩擦联接元件的锁定/解锁压力室供给到压力水平上升的工作油的过渡压力的压力水平 元件和第二摩擦联接元件分别同时解锁和锁定,并且在第二特定变速期间从第二摩擦联接元件的锁定/解锁压力室排出时减小,其中第一摩擦联接元件和第二摩擦联接器 元件分别同时被锁定和解锁,以及过渡持续时间控制,用于在第一和第二特定档位中的任何一个期间控制过渡压力的持续时间。