Transmission oil pressure control during engine autostart
    5.
    发明授权
    Transmission oil pressure control during engine autostart 有权
    发动机自动启动期间变速箱油压控制

    公开(公告)号:US09067599B2

    公开(公告)日:2015-06-30

    申请号:US13785413

    申请日:2013-03-05

    摘要: A vehicle includes an engine having autostart functionality, a source of fluid pressure when the engine is off, a flow control solenoid that outputs a variable clutch pressure, a transmission, an electric motor, and a controller. The transmission includes a clutch in fluid communication with the solenoid. The clutch applies via the clutch pressure to establish a first gear launch state. The motor is powered via a rechargeable energy storage system. The controller executes a method to transmit pulse width modulation (PWM) control signals to the solenoid upon detection of a set of conditions triggering the autostart event to lower clutch pressure to a first calibrated level. Restart of the engine is commanded, and the clutch pressure increases toward a second calibrated level while engine speed is increasing. The controller discontinues the PWM control signals and increases clutch pressure to line pressure when the input speed exceeds a calibrated threshold.

    摘要翻译: 车辆包括具有自动启动功能的发动机,当发动机关闭时的流体压力源,输出可变离合器压力的流量控制螺线管,变速器,电动马达和控制器。 变速器包括与螺线管流体连通的离合器。 离合器通过离合器压力施加以建立第一档发射状态。 电机通过可再充电能量存储系统供电。 控制器执行一种方法,用于在检测到触发自动启动事件的一组条件以将离合器压力降低到第一校准水平时,向螺线管发送脉宽调制(PWM)控制信号。 指示发动机的重新启动,当发动机转速增加时,离合器压力向第二校准水平增加。 当输入速度超过校准阈值时,控制器停止PWM控制信号,并将离合器压力提高到管路压力。

    CONTROL OF A TRANSMISSION FRICTION ELEMENT USING AN ADAPTIVE TRANSFER FUNCTION
    7.
    发明申请
    CONTROL OF A TRANSMISSION FRICTION ELEMENT USING AN ADAPTIVE TRANSFER FUNCTION 有权
    使用自适应传递函数控制传动摩擦元件

    公开(公告)号:US20140324308A1

    公开(公告)日:2014-10-30

    申请号:US13873423

    申请日:2013-04-30

    IPC分类号: F16D48/06

    摘要: A transmission clutch control method includes defining a transfer function relating clutch torque to a control signal under transmission operating conditions; determining a target clutch torque for current operating conditions; determining the target control signal from the transfer function to produce target torque at the clutch; correcting clutch torque on the basis of a difference between the target clutch torque and the actual torque at the clutch by adjusting the control signal; calculating actual clutch torque with reference to transmission input torque and transmission output torque; computing a clutch torque error as a difference between calculated clutch torque and the target clutch torque; and repetitively adjusting the transfer function on the basis of the clutch torque error.

    摘要翻译: 传动离合器控制方法包括在传动操作条件下定义与离合器扭矩相关的控制信号的传递函数; 确定当前操作条件的目标离合器扭矩; 从传递函数确定目标控制信号以在离合器处产生目标转矩; 通过调整控制信号,根据目标离合器转矩与离合器的实际转矩之间的差来修正离合器转矩; 参考传动输入扭矩和变速器输出扭矩计算实际离合器扭矩; 计算离合器扭矩误差作为计算的离合器扭矩与目标离合器扭矩之差; 并基于离合器转矩误差重复地调节传递函数。

    TRANSMISSION OIL PRESSURE CONTROL DURING ENGINE AUTOSTART
    8.
    发明申请
    TRANSMISSION OIL PRESSURE CONTROL DURING ENGINE AUTOSTART 有权
    发动机自动变速箱油压控制

    公开(公告)号:US20140257607A1

    公开(公告)日:2014-09-11

    申请号:US13785413

    申请日:2013-03-05

    IPC分类号: B60W20/00

    摘要: A vehicle includes an engine having autostart functionality, a source of fluid pressure when the engine is off, a flow control solenoid that outputs a variable clutch pressure, a transmission, an electric motor, and a controller. The transmission includes a clutch in fluid communication with the solenoid. The clutch applies via the clutch pressure to establish a first gear launch state. The motor is powered via a rechargeable energy storage system. The controller executes a method to transmit pulse width modulation (PWM) control signals to the solenoid upon detection of a set of conditions triggering the autostart event to lower clutch pressure to a first calibrated level. Restart of the engine is commanded, and the clutch pressure increases toward a second calibrated level while engine speed is increasing. The controller discontinues the PWM control signals and increases clutch pressure to line pressure when the input speed exceeds a calibrated threshold.

    摘要翻译: 车辆包括具有自动启动功能的发动机,当发动机关闭时的流体压力源,输出可变离合器压力的流量控制螺线管,变速器,电动马达和控制器。 变速器包括与螺线管流体连通的离合器。 离合器通过离合器压力施加以建立第一档发射状态。 电机通过可再充电能量存储系统供电。 控制器执行一种方法,用于在检测到触发自动启动事件的一组条件以将离合器压力降低到第一校准水平时,向螺线管发送脉宽调制(PWM)控制信号。 指示发动机的重新启动,当发动机转速增加时,离合器压力向第二校准水平增加。 当输入速度超过校准阈值时,控制器停止PWM控制信号,并将离合器压力提高到管路压力。

    Power take-off control system
    10.
    发明申请
    Power take-off control system 有权
    动力输出控制系统

    公开(公告)号:US20050217397A1

    公开(公告)日:2005-10-06

    申请号:US10810878

    申请日:2004-03-26

    申请人: Yanming Hou

    发明人: Yanming Hou

    IPC分类号: F16D48/06 F16H37/00

    摘要: A control system and method for detecting variable load types and controlling the operation of a PTO clutch to effect engagement of the clutch with variable loads, and especially to more optimally effect the engagement of a clutch with a very light load or an associated over-running clutch is disclosed. The control system includes a controller that receives input and output clutch shaft speed signals and generates control signals to control the pressure applied by the clutch. If no appreciable engine droop is detected at the time of initial movement of the output clutch shaft, the load is considered to be of a very light load type, and a set of control signals based upon such load type designation, which control signals define a control curve that is flatter and more gentle than would otherwise be considered desirable, is thereafter applied to the clutch to effect engagement of the load.

    摘要翻译: 一种用于检测可变负载类型并控制PTO离合器的操作以实现离合器与可变负载的接合的控制系统和方法,特别是更好地影响离合器与非常轻的负载或相关联的过运行 离合器被公开。 控制系统包括控制器,其接收输入和输出离合器轴速度信号并产生控制信号以控制由离合器施加的压力。 如果在输出离合器轴的初始运动时没有检测到可观察到的发动机下垂,则认为负载是非常轻的负载类型,并且基于这种负载类型指定的一组控制信号,该控制信号限定一个 然后将控制曲线平坦且比现在所认为的更为平缓的控制曲线施加到离合器以实现负载的接合。