DIAGNOSTIC METHOD FOR A TORQUE CONTROL OF AN ELECTRICALLY VARIABLE TRANSMISSION
    1.
    发明申请
    DIAGNOSTIC METHOD FOR A TORQUE CONTROL OF AN ELECTRICALLY VARIABLE TRANSMISSION 有权
    用于电动变速箱变速箱扭矩控制的诊断方法

    公开(公告)号:US20050252283A1

    公开(公告)日:2005-11-17

    申请号:US10846142

    申请日:2004-05-14

    摘要: A condition of impaired speed and torque control of a parallel electrically variable transmission due to factors beyond nominal modeling and estimation errors is diagnosed under low speed operation. The transmission includes at least one electric machine and a motor torque controller for regulating the transmission input speed and output torque. The motor torque controller includes an open-loop control path based on predetermined torques and accelerations and a closed loop control path based on input speed error. The presence of a larger than expected closed-loop correction magnitude, combined with low output speed and one or more other conditions is used to diagnose a condition of potential torque error, in which case the transmission control is altered to prevent unwanted operation.

    摘要翻译: 在低速运行下诊断由于超出标称建模和估计误差的因素而导致的平行电动变速器的速度和转矩控制受损的条件。 变速器包括至少一个电机和用于调节变速器输入速度和输出转矩的电动机转矩控制器。 电动机转矩控制器包括基于预定转矩和加速度的开环控制路径和基于输入速度误差的闭环控制路径。 使用大于预期的闭环校正幅度以及低输出速度和一个或多个其他条件的存在来诊断潜在的扭矩误差的情况,在这种情况下改变传输控制以防止不期望的操作。

    Method for automatic traction control in a hybrid electric vehicle
    3.
    发明申请
    Method for automatic traction control in a hybrid electric vehicle 有权
    混合动力汽车自动牵引力控制方法

    公开(公告)号:US20050256629A1

    公开(公告)日:2005-11-17

    申请号:US10846016

    申请日:2004-05-14

    IPC分类号: B60L15/20 G06F17/00

    摘要: A method for providing traction control in vehicle powertrain systems is particularly adapted for traction control in a powertrain system of a hybrid electric vehicle comprising an internal combustion engine, an electric machine and a transmission that is operatively coupled to the electric machine and the engine and adapted to provide a transmission torque output in response to a transmission torque input received as a torque output from either or both of the engine and the electric machine. The method is adapted to utilize conventional traction control and engine control hardware, software and communication standards to implement traction control. In one embodiment of the invention, a conventional traction controller is used to detect a wheel spin condition and provide a plurality of first output torque command messages in response thereto. The plurality of first output torque command messages are used to obtain a torque reduction which is applied to a reference output torque to obtain a corresponding plurality of traction control output torque commands for the powertrain system during the wheel spin condition. A rate limit may also be applied to control the rate of change between successive ones of the traction control output torque commands in order to reduce the possibility of extension of the wheel spin condition, or recurrence of another wheel spin condition. Each traction control output torque command may be used to determine an associated traction control engine torque output command and traction control electric machine torque output command.

    摘要翻译: 用于在车辆动力系统中提供牵引力控制的方法特别适用于混合动力车辆的动力系统中的牵引力控制,所述混合动力车辆包括内燃机,电机和可操作地耦合到电机和发动机的变速器, 以响应于作为从发动机和电机中的一个或两者输出的扭矩接收的传动转矩输入来提供传动转矩输出。 该方法适用于利用传统的牵引力控制和发动机控制硬件,软件和通信标准来实现牵引力控制。 在本发明的一个实施例中,传统的牵引控制器用于检测车轮旋转状态,并响应于此提供多个第一输出转矩指令消息。 多个第一输出转矩指令消息用于获得施加到参考输出转矩的转矩降低,以在车轮旋转状态期间获得用于动力系统的相应的多个牵引控制输出转矩指令。 也可以应用速率限制来控制牵引控制输出转矩指令中连续的转矩指令之间的变化率,以便减少车轮旋转条件的延长或另一个车轮旋转状态的再现。 每个牵引力控制输出转矩指令可用于确定相关的牵引力控制发动机转矩输出指令和牵引力控制电机转矩输出指令。

    Multi-stage compression ignition engine start
    6.
    发明申请
    Multi-stage compression ignition engine start 有权
    多级压缩点火发动机起动

    公开(公告)号:US20050252474A1

    公开(公告)日:2005-11-17

    申请号:US10846013

    申请日:2004-05-14

    摘要: A powertrain includes a diesel compression engine and an electric machine operatively coupled thereto and effective to rotate the engine during engine cranking. Cold engine cranking is accomplished in a staged manner including a first stage wherein the engine is cranked to a first speed below the resonant speed of the coupled engine and electric machine combination for a first duration and thereafter cranked to a second speed above the resonant speed for a second duration. Transition out of cranking at the first and second speeds is accomplished when relative combustion stability is demonstrated. Cranking at the first or second speed is aborted when excessive crank times or if low battery voltages are observed. A third stage is included wherein the engine is cranked to a third speed below the engine idle speed. Transition out of cranking at the third speed is accomplished when relative combustion stability is demonstrated, whereafter normal engine control takes over.

    摘要翻译: 动力系包括柴油压缩发动机和可操作地联接到其上的电机,并且在发动机起动期间有效地使发动机旋转。 冷发动机起动以分阶段方式实现,包括第一阶段,其中发动机起动至低于联合发动机和电机组合的共振速度的第一速度,并且之后起动至高于谐振速度的第二速度 第二个持续时间。 当相对燃烧稳定性得到证实时,可以以第一和第二速度转换起动。 在超过曲柄时间或观察到电池电压不足时,以第一或第二速度起动。 包括第三级,其中发动机起动至低于发动机怠速转速的第三速度。 当相对燃烧稳定性得到证明时,在第三速度下转变为起动,此后正常的发动机控制接管。