Control device for automatic transmission and control method for automatic transmission

    公开(公告)号:US11204096B2

    公开(公告)日:2021-12-21

    申请号:US16971362

    申请日:2019-02-28

    发明人: Kazuki Hirasako

    摘要: A control device for an automatic transmission arranged between an engine and a drive wheel, the automatic transmission including a torque converter having a lock-up clutch, and a transmission mechanism. The control device includes a shift control unit configured to perform shift control of the transmission mechanism. The shift control unit includes a forced downshift control processing unit configured to implement forced downshift when an accelerator foot release operation is performed during auto-upshift in a power-on state with the lock-up clutch engaged. The forced downshift control processing unit is configured to start the forced downshift before an engine rotation speed that has decreased due to the auto-upshift reaches a lock-up release rotation speed.

    Continuously variable transmission control apparatus
    5.
    发明申请
    Continuously variable transmission control apparatus 有权
    连续变速传动控制装置

    公开(公告)号:US20050080536A1

    公开(公告)日:2005-04-14

    申请号:US10960515

    申请日:2004-10-08

    摘要: A theoretical torque transmitted through a belt is calculated, and a first guaranteed torque is calculated by adding a marginal torque to the theoretical torque. In step S101, the theoretical torque is multiplied by a safety factor, calculating a second guaranteed torque. The second guaranteed torque is set to a value greater than a lower limit value. A smaller one of the first guaranteed torque and the second guaranteed torque is stored in a buffer, and a pressing force calculation reference torque is set through the buffer.

    摘要翻译: 计算通过带传递的理论转矩,并通过将理论转矩加上边际转矩来计算第一保证转矩。 在步骤S101中,将理论转矩乘以安全系数,计算第二保证转矩。 第二保证扭矩设定为大于下限值的值。 第一保证扭矩和第二保证扭矩中较小的一个存储在缓冲器中,并且通过缓冲器设定按压力计算参考扭矩。

    Process for the control of a transmission
    8.
    发明授权
    Process for the control of a transmission 有权
    用于控制传输的过程

    公开(公告)号:US6109407A

    公开(公告)日:2000-08-29

    申请号:US268370

    申请日:1999-03-15

    摘要: A process for the control of non-synchronized, manually shiftable vehicle transmissions which are actuated in vehicles of new construction by means of an automated transmission control system whereby the driver is able to select a desired gear by means of an operating unit which is connected electrically to the transmission control system. When the vehicle is stopped and the clutch is disengaged practice of the invention prevents a situation in which the engagement of a gear is prevented by a tooth-on-tooth position of the transmission claws. The disclosed process makes it possible to engage the selected gear in all operating states of the vehicle in a simple and reliable manner. In this regard, a desired gear is first selected, and the clutch is then disengaged. When a suitable speed of the transmission input is then reached, a gear to be engaged is automatically engaged. Thereby, the engagement of a gear when the vehicle is stopped is systematized and facilitated for the driver. Furthermore the driver need not disengage and then again engage the clutch repeatedly in order to avoid a tooth-on-tooth position. The process is used preferably in utility vehicles.

    摘要翻译: 用于控制通过自动变速器控制系统在新结构的车辆中被致动的非同步的,可手动换档的车辆变速器的过程,由此驾驶员能够通过电连接的操作单元来选择期望的档位 传输控制系统。 当车辆停止并且离合器脱离时,本发明的实践防止了传动爪的齿上齿位置防止齿轮接合的情况。 所公开的过程使得可以以简单和可靠的方式将所选择的档位与车辆的所有操作状态啮合。 在这方面,首先选择期望的齿轮,然后离合器被分离。 当达到传动输入的合适速度时,自动啮合的齿轮。 因此,当车辆停止时齿轮的接合系统化并且便于驾驶员。 此外,驱动器不需要脱离,然后再次重复地接合离合器,以避免齿上齿位置。 该方法优选用于多用途车辆中。