Automatic transmission for a vehicle

    公开(公告)号:US06558287B2

    公开(公告)日:2003-05-06

    申请号:US10073139

    申请日:2002-02-13

    IPC分类号: F16H362

    摘要: A multi-speed automatic transmission improves transmission efficiency by reducing drag loss due to high speed rotation of a freely rotating element of a planetary gear set. An automatic transmission for a vehicle includes: an input path T1 of a first speed ratio; an input path T2 which has a larger speed ratio than this input path T1; a planetary gear set of four elements, wherein the four elements are a first element, a second element, a third element, and a fourth element following an order of elements on a speed diagram; a clutch C-2 transmitting a rotation of the input path T2 to the first element S3; a clutch C-1 transmitting the rotation from the input path T2 to the fourth element S2; a clutch C-4 transmitting a rotation from the input path T1 to the first element; a clutch C-3 transmitting the rotation from the input path T1 to the second element C3; a brake B-1 engaging the fourth element; a brake B-2 engaging the second element; and an output member coupled with the third element R3. Accordingly, drag resistance is prevented from increasing because no extremely high speed rotation of the freely rotating element is generated, even when a speed is achieved using any combination of the engagement elements.

    Hydraulic control apparatus for an automatic transmission
    3.
    发明授权
    Hydraulic control apparatus for an automatic transmission 失效
    自动变速器用液压控制装置

    公开(公告)号:US06494803B2

    公开(公告)日:2002-12-17

    申请号:US09741165

    申请日:2000-12-21

    IPC分类号: F16H3100

    摘要: To make it possible to maintain speeds during failures in an automatic transmission that does not have exclusive friction elements corresponding to the attainment of each speed. The hydraulic control apparatus of an automatic transmission, provided with control means 71-74 for supplying regulated pressure to each of the hydraulic servos 81-84 that are first through fourth friction elements to which hydraulic pressure is supplied from the oil path L1, and provided with switching valves (1)-(5) for cutting off the supply of hydraulic pressure to friction elements other than the friction elements that engage in each speed, on the upstream side of the supply paths L31, L32, L10, L11 and L12. Each switching valve is switched by hydraulic pressure (C1-C3, B1 pressures) regulated by the control means that achieve regulated pressure operating conditions during failures, and selective application of signal pressure (Sol, SolB, SoIC pressures) output by the control means as operating means. In a speed that has been attained, the supply path to friction elements that are not to be engaged is cut off. Through this, even during failures the regulated pressure action of the control means corresponding to friction elements that are not to be engaged is ineffective, so the speed that has been attained is fixed.

    摘要翻译: 为了使自动变速器的故障期间的速度保持不变,该自动变速器不具有与实现每个速度相应的专用摩擦元件。 一种自动变速器的液压控制装置,设有控制装置71-74,用于向从油路L1供应液压的第一至第四摩擦元件的每个液压伺服机构81-84提供调节压力,并提供 在供给路径L31,L32,L10,L11和L12的上游侧,切换阀(1) - (5)用于切断除了接合各速度的摩擦元件以外的摩擦元件的液压供给。 每个切换阀通过由控制装置调节的液压(C1-C3,B1压力)切换,在故障期间达到调节压力运行条件,并且选择性地施加由控制装置输出的信号压力(Sol,SolB,SoIC压力) 操作手段。 在已经达到的速度下,切断不被接合的摩擦元件的供给路径。 通过这种方式,即使在故障期间,对应于不接合的摩擦元件的控制装置的调节压力作用是无效的,所以已经达到的速度是固定的。

    Hydraulic servo device for automatic transmissions
    6.
    发明授权
    Hydraulic servo device for automatic transmissions 失效
    液压伺服装置用于自动变速器

    公开(公告)号:US5916347A

    公开(公告)日:1999-06-29

    申请号:US972745

    申请日:1997-11-18

    摘要: A hydraulic servo device for an automatic transmission is presented with a reduced axial length as a result of the manner in which oil pressure is fed into the cylinder. The hydraulic servo device includes a cylinder, a piston position to slide within the cylinder, a rod connected to the piston, and a cover member for closing the open end of the cylinder. The cover member, in association with the cylinder and the piston, defines an oil chamber in the cylinder. An oil passage for feeding an oil pressure to the oil chamber is formed by an opening in the cover member.

    摘要翻译: 用于自动变速器的液压伺服装置由于将油压送入气缸的方式而具有减小的轴向长度。 液压伺服装置包括气缸,活塞在气缸内滑动的位置,连接到活塞的杆以及用于封闭气缸的开口端的盖构件。 与气缸和活塞相关联的盖构件在气缸中限定油室。 用于向油室供给油压的油通道由盖构件中的开口形成。

    Automatic transmission for vehicles
    7.
    发明授权
    Automatic transmission for vehicles 失效
    汽车自动变速器

    公开(公告)号:US5735376A

    公开(公告)日:1998-04-07

    申请号:US621033

    申请日:1996-03-22

    摘要: A vehicular automatic transmission, for establishing a plurality of forward gear stages, includes: a transmission case; an input shaft; a transmission mechanism connected to the input shaft and including a plurality of transmission elements; an output shaft connected to the transmission mechanism; a clutch drivably connecting any one of the input shaft and the transmission elements individually; and a hydraulic servo for applying the clutch responsive to an oil pressure. The transmission case encloses the transmission mechanism, the clutch and the hydraulic servo, and includes axial end walls, on one of which is formed a stationary cylinder for the hydraulic servo. A piston is slidably mounted in the cylinder and together with the cylinder, defines an oil chamber for receipt of the actuating oil pressure. A bearing is arranged between the piston and the clutch for transmitting the thrust force from the piston to the clutch, while allowing relative rotation between the piston and the clutch. The clutch includes a hub with an outer cylindrical surface splined to a friction plate assembly and a rim radially spaced from the hub with the friction plate assembly splined to its inner cylindrical surface. The input shaft is connected to the hub whereas one of the transmission elements is connected to the rim.

    摘要翻译: 一种用于建立多个前进档位的车辆自动变速器,包括:变速箱; 输入轴; 连接到所述输入轴并且包括多个传动元件的传动机构; 连接到传动机构的输出轴; 分别驱动地连接输入轴和传动元件中的任一个的离合器; 以及用于响应于油压而施加离合器的液压伺服机构。 传动箱包围传动机构,离合器和液压伺服机构,并且包括轴向端壁,其中一个壁形成液压伺服机构的静止气缸。 活塞可滑动地安装在气缸中并与气缸一起形成用于接收致动油压力的油室。 在活塞和离合器之间布置有用于将推力从活塞传递到离合器的轴承,同时允许活塞和离合器之间的相对旋转。 离合器包括具有花键连接到摩擦板组件的外圆柱形表面的轮毂和与轮毂径向间隔开的边缘,摩擦板组件花键连接到其内圆柱形表面。 输入轴连接到轮毂,而其中一个传动元件连接到轮辋。

    Control method and control system for automatic transmission
    8.
    发明授权
    Control method and control system for automatic transmission 失效
    自动变速箱控制方法及控制系统

    公开(公告)号:US5630772A

    公开(公告)日:1997-05-20

    申请号:US428552

    申请日:1995-04-25

    摘要: A system and method for controlling an automatic transmission in a vehicle drive train including an engine, the automatic transmission and a fluid coupling for transmitting the rotation of the engine to the transmission. The transmission includes a clutch applied when a forward running range is selected; a second one-way clutch which is applied, when the first clutch is applied, to establish a forward 1st speed; and a brake for locking the one-way clutch, when applied, to block the reverse rotation of the output shaft of the transmission. A first hydraulic servo receives a first oil pressure for applying the first clutch and a second hydraulic servo receives a second oil pressure for applying the brake. When a forward running range is selected, with the vehicle stopped, the engine idling and a foot brake engaged, the oil pressure of the first hydraulic servo is lowered from the oil pressure at the 1st speed whereas the oil pressure of the second hydraulic servo is raised to a modulated pressure. The modulated pressure is set to generate, against the reverse force on the vehicle facing up an incline, a resistance corresponding to the forward driving force generated when the engine is idling in 1st speed.

    摘要翻译: 一种用于控制包括发动机,自动变速器和用于将发动机的旋转传递到变速器的流体联动器的车辆传动系中的自动变速器的系统和方法。 变速器包括当选择正向行驶范围时施加的离合器; 当施加第一离合器时,施加第二单向离合器以建立前进1速度; 以及用于在施加时用于锁定单向离合器的制动器,以阻止变速器的输出轴的反向旋转。 第一液压伺服机构接收用于施加第一离合器的第一油压,而第二液压伺服机构接收用于施加制动器的第二油压。 当选择正向行驶范围时,当车辆停止时,发动机怠速和脚踏制动器接合,第一液压伺服机构的油压从第一速度的油压降低,而第二液压伺服机构的油压为 提高到调制压力。 调制压力被设定为产生对着车辆朝向斜坡的反向力,该阻力对应于当发动机以第一速度空转时产生的前进驱动力。

    Shift control system for preventing engine racing
    9.
    发明授权
    Shift control system for preventing engine racing 失效
    换档控制系统,用于防止发动机赛车

    公开(公告)号:US5583768A

    公开(公告)日:1996-12-10

    申请号:US611972

    申请日:1996-03-06

    摘要: A shift control system for shifting an automatic transmission from a predetermined gear stage to another by draining an oil pressure from predetermined frictional engagement element to release the same frictional engagement element and by feeding the oil pressure to another frictional engagement element to engage the same frictional engagement element while controlling the drain oil pressure of the frictional engagement element to be released and the engaging oil pressure to the frictional engagement element to be engaged. The shift control system includes an engine racing detector for detecting the racing of the engine while the transmission is being shifted in a clutch-to-clutch manner, and a hydraulic control circuit for controlling at least one of the drain oil pressure and the engaging oil pressure, on the basis of the degree of racing of the engine, as detected by the engine racing detector, such that the amount of racing of the engine falls within a predetermined range. Since the rotational state of the engine being shifted is controlled by hydraulic control of the frictional engagement elements participating in the clutch-to-clutch shift, it is possible to reliably prevent any excessive racing of the engine and to prevent reduction of output shaft torque due to the tie-up of the frictional engagement elements.

    摘要翻译: 一种变速控制系统,用于通过从预定的摩擦接合元件排出油压以释放相同的摩擦接合元件并通过将油压馈送到另一个摩擦接合元件来接合相同的摩擦接合,从而将自动变速器从预定齿轮级移动到另一个齿轮级 同时控制要释放的摩擦接合元件的排出油压力和与摩擦接合元件接合的接合油压。 变速控制系统包括:发动机转速检测器,用于在变速器以离合器离合器方式移动时检测发动机的行驶;以及液压控制回路,用于控制排油压力和接合油中的至少一个 基于由发动机赛车检测器检测到的发动机的赛车程度,使得发动机的行驶量落在预定范围内的压力。 由于通过参与离合器离合器换档的摩擦接合元件的液压控制来控制发动机的旋转状态,因此可以可靠地防止发动机的任何过度的运转,并且防止输出轴的扭矩减小 到摩擦接合元件的结合。

    Automatic transmission control apparatus
    10.
    发明授权
    Automatic transmission control apparatus 失效
    自动变速器控制装置

    公开(公告)号:US5542887A

    公开(公告)日:1996-08-06

    申请号:US428968

    申请日:1995-04-25

    摘要: An automatic transmission control system providing a neutral control state in which there is no slipping engagement of a first clutch which is engaged upon selection of a forward range and, as a result, the vehicle is not subjected to idling vibration. The fuel consumption reducing effect of the neutral control state is maintained and there is no heating and consequent deterioration of the friction material of the clutch. The control system includes a hydraulic servo for operation of the clutch, an input side speed sensor for detecting the input side speed of a fluid power coupling device connecting the transmission to the output of an engine, an output side speed sensor for detecting the output side speed of the fluid power coupling device, and a controller. The controller includes differential speed calculator, differential speed change detector, a pressure increasing device for increasing the hydraulic pressure of the hydraulic servo by a set pressure when the differential speed has not changed, and a pressure reducing device for reducing the hydraulic pressure of the hydraulic servo by a set pressure when the differential speed has changed.

    摘要翻译: 一种自动变速器控制系统,其提供空档控制状态,其中在选择前进档位时接合的第一离合器没有滑动接合,结果,车辆不受到空转振动。 保持中性控制状态的燃料消耗降低效果,并且不会导致离合器的摩擦材料的加热和随之而来的劣化。 控制系统包括用于操作离合器的液压伺服机构,用于检测将变速器与发动机的输出连接的流体动力联接装置的输入侧速度的输入侧速度传感器,检测输出侧的输出侧速度传感器 流体动力耦合装置的速度和控制器。 控制器包括差速器计算器,差速变速检测器,用于当差速没有变化时将设定压力提高液压伺服机构的液压的增压装置,以及用于降低液压油压的减压装置 当差速变化时,通过设定压力伺服。