Hydraulic servo apparatus for automatic transmission
    6.
    发明授权
    Hydraulic servo apparatus for automatic transmission 有权
    液压伺服装置用于自动变速器

    公开(公告)号:US06220402B1

    公开(公告)日:2001-04-24

    申请号:US09261489

    申请日:1999-03-03

    IPC分类号: F16D5100

    CPC分类号: F16H63/3003

    摘要: A hydraulic servo includes a cylinder, a piston and a rod. The piston divides the interior space of the cylinder between a closed hydraulic chamber and a back chamber which has an opening to the interior space of an automatic transmission. The rod is slidably mounted in the piston for relative movement through a predetermined distance. A frictional engagement element is engaged by the rod which is extended from one end of the cylinder by applying a hydraulic pressure to the hydraulic chamber. A passage is provided between the piston and the rod which is opened or closed by the relative movement between the piston and rod so that the hydraulic chamber and the back chamber are connected or disconnected. A valving arrangement (“closer”) closes the passage at the end of the return stroke of the piston toward the hydraulic chamber.

    摘要翻译: 液压伺服机构包括气缸,活塞和杆。 活塞将气缸的内部空间划分在具有到自动变速器的内部空间的开口的闭合的液压室和后室之间。 杆可滑动地安装在活塞中以相对运动经过预定距离。 摩擦接合元件由杆接合,杆通过向液压室施加液压而从气缸的一端延伸。 在活塞和杆之间设有通过活塞和杆之间的相对运动打开或关闭的通道,使得液压室和后室连接或断开。 阀门装置(“靠近”)在活塞的返回行程结束时朝向液压室关闭通道。

    Control apparatus for automatic transmission
    7.
    发明授权
    Control apparatus for automatic transmission 失效
    自动变速箱控制装置

    公开(公告)号:US5911646A

    公开(公告)日:1999-06-15

    申请号:US774529

    申请日:1996-12-30

    摘要: When a vehicle is halted with the transmission in a forward drive range, an input clutch is disengaged to enhance the fuel efficiency and, at the same times a hill-hold brake is engaged to prevent the vehicle from rolling backward on a steep up-slope. At that time, the hydraulic pressure P.sub.C-1 of the input clutch C1 is gradually reduced by .DELTA.P.sub.CIR (P.sub.C-1 =P.sub.C-1 -.DELTA.P.sub.CIR) while the hydraulic pressure P.sub.B-1 of the hill-hold brake B1 is increased gradually so as to satisfy an equation P.sub.B-1 =K1+K2 X e where .DELTA.P.sub.cir is a change in hydraulic pressure which is required for gradually disengaging the first clutch C1, K1 is a hill-hold brake pressure at which braking resistance begins, K2 is hill-hold brake pressure producing a fully braked condition, and e is the input/output rotational-speed ratio of a torque converter Subsequently during start of vehicle movement, the hydraulic pressure P.sub.C-1 of the input clutch C1 is gradually increased (P.sub.C-1 =p.sub.C-1 +.DELTA.P.sub.C-1A) while the hydraulic pressure P.sub.B-1 of the hill-hold brake B1 is gradually decreased (P.sub.B-1 ==P.sub.B-1-.DELTA.P.sub.B-1) until the ratio of the rotational speed N.sub.C-1 of the first clutch C1 becomes less than a rotational speed N.sub.C-1E corresponding to the clutch being almost engaged .DELTA.P.sub.C-1A and .DELTA.P.sub.B-1 are incremental values proportional to accelerator depression so that a delay in starting is reduced in accordance with driver demand.

    摘要翻译: 当车辆在前进驱动范围内的变速器停止时,输入离合器被分离以提高燃料效率,并且同时接合山形制动器以防止车辆在陡峭的上坡上向后滚动 。 此时,在山体抱闸B1的液压PB-1逐渐增大的同时,通过DELTA PCIR(PC-1 = PC-1-DELTA PCIR)逐渐减小输入离合器C1的液压PC-1 以满足公式PB-1 = K1 + K2×e,其中DELTA Pcir是逐渐脱离第一离合器C1所需的液压变化,K1是制动电阻开始时的保持制动压力,K2 是抱闸制动压力,产生完全制动状态,e是变矩器的输入/输出转速比。 随后在车辆移动开始时,输入离合器C1的液压PC-1逐渐增加(PC-1 = pC-1 + DELTA PC-1A),而抱抱制动器B1的液压PB-1为 逐渐减小(PB-1 = PB-1-DELTA PB-1),直到第一离合器C1的转速NC-1的比率变得小于对应于几乎接合的离合器的转速NC-1E DELTA PC- 1A和DELTA PB-1是与加速器抑制成比例的增量值,从而根据驾驶员需求减少启动延迟。

    Shift control device for automatic transmission
    9.
    发明授权
    Shift control device for automatic transmission 失效
    换档控制装置,用于自动变速器

    公开(公告)号:US6102830A

    公开(公告)日:2000-08-15

    申请号:US56793

    申请日:1998-04-08

    摘要: When a shift to a second gear ratio (second ratio) is determined during a shift control for a first shift (shift from fourth ratio to third ratio), the process status, or circumstances, of the first shift is determined using a hydraulic pressure for a fourth brake being engaged at the determination. When the process status, that is, the process circumstances, is in early phase, the first shift is interrupted and shift control for the direct shift to the second ratio (shift from fourth ratio to second ratio) is performed (first shift pattern). When the process status is in a late phase, the first shift control is continued, and after ending of the first shift control, the control for the shift to the second gear ratio (shift from third ratio to second ratio) is performed (second shift pattern). In the case of power off state, the second shift pattern is performed irrespective of the process status.

    摘要翻译: 当在第一班次的换档控制(从第四档次向第三档位转换)中确定换档到第二变速比(第二档位)时,第一变速档的处理状态或状态是使用液压 在确定时接合第四制动器。 当处理状态即处理情况处于早期阶段时,第一班次被中断,并且执行从第四比例到第二比例的直接班次的换档控制(第一班班模式)。 当过程状态处于后期阶段时,第一变速控制继续进行,并且在第一变速控制结束之后,进行向第二变速比的换档(从第三速比向第二转速)的控制(第二变速 模式)。 在断电状态的情况下,与处理状态无关地执行第二移位模式。

    Hydraulic pressure control apparatus for an automatic transmission
    10.
    发明授权
    Hydraulic pressure control apparatus for an automatic transmission 失效
    用于自动变速器的液压控制装置

    公开(公告)号:US5782711A

    公开(公告)日:1998-07-21

    申请号:US768462

    申请日:1996-12-18

    摘要: A hydraulic pressure control apparatus for an automatic transmission including a microprocessor-based control unit for controlling hydraulic pressure supplied to hydraulic servos of friction engagement elements. The control apparatus calculates a target hydraulic pressure P.sub.TA for a condition at the start of the inertia phase in accordance with the input torque, and a gradient based on the target hydraulic pressure and a predetermined time t.sub.TA. A first up-sweep of hydraulic pressure is performed by the apparatus with the gradient. A relatively gradual gradient .delta.P.sub.TA is set based on a target rotation change rate for the input rotational speed to provide a predetermined change amount when the hydraulic pressure becomes the target hydraulic pressure P.sub.TA. The control apparatus performs a second up-sweep with the gradient .delta.P.sub.TA. When the rotational speed change .DELTA.N of the input rotation becomes a rotation change start-determining rotational speed dN.sub.S, the control apparatus feedback-controls the hydraulic pressure with a predetermined gradient while referring to the input rotation change. Further, the control apparatus detects the target shift start time and the rotational speed change rate at the target shift start time to correct the target hydraulic pressure P.sub.TA, the gradient .delta.P.sub.TA of the second sweep section, and the target shift start time t.sub.aim.

    摘要翻译: 一种用于自动变速器的液压控制装置,包括基于微处理器的控制单元,用于控制供应到摩擦接合元件的液压伺服的液压。 控制装置根据输入转矩和基于目标液压和规定时间tTA的梯度,计算出惯性阶段开始时的条件的目标液压PTA。 液压的第一次上升是由具有梯度的装置进行的。 基于用于输入转速的目标旋转变化率来设定相对逐渐的梯度ΔPTA,以在液压成为目标液压PTA时提供预定的变化量。 控制装置用梯度ΔPTA执行第二次上扫。 当输入旋转的转速变化DELTA N变为旋转变化开始判定转速dNS时,控制装置参照输入的转动变化以预定的斜率反馈控制液压。 此外,控制装置检测目标换档开始时刻的目标换档开始时间和转速变化率,以校正目标液压PTA,第二扫描部分的斜率ΔPTA和目标换档开始时间taim。