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    • 3. 发明授权
    • Method of testing motor torque integrity in a hybrid electric vehicle
    • 在混合动力电动汽车中测试电机转矩完整性的方法
    • US07368886B2
    • 2008-05-06
    • US10846000
    • 2004-05-14
    • Tung-Ming HsiehGregory A. HubbardJy-Jen F. Sah
    • Tung-Ming HsiehGregory A. HubbardJy-Jen F. Sah
    • H02P1/04
    • G01R31/343
    • A method of testing an electric motor that is adapted to provide a desired electric motor output torque to a vehicle powertrain system comprising an engine and the electric motor which are operatively and selectively coupled to a transmission. The method includes the steps of determining an initial motor speed of the electric motor, determining a motor torque command as a function of the initial motor speed, applying the motor torque command to the electric motor to produce an output torque from the electric motor, measuring a resultant motor speed of the electric motor and establishing a motor status as a function of the resultant motor speed. The method may be implemented as a computer control and diagnostic algorithm.
    • 一种测试电动机的方法,该电动机适于向包括发动机和电动机的车辆动力系统系统提供期望的电动机输出转矩,所述发动机和电动机可操作地和选择性地联接到变速器。 该方法包括以下步骤:确定电动机的初始电动机速度,确定作为初始电动机转速的函数的电动机转矩指令,将电动机转矩指令应用于电动机以产生来自电动机的输出转矩,测量 电动机的合成电动机速度,并且根据所得到的电动机速度建立电动机状态。 该方法可以被实现为计算机控制和诊断算法。
    • 5. 发明授权
    • Multi-stage compression ignition engine start
    • 多级压缩点火发动机起动
    • US07028657B2
    • 2006-04-18
    • US10846013
    • 2004-05-14
    • Jy-Jen F. SahGregory A. HubbardWilliam R. CawthorneXuefeng T. TaoTodd M. Steinmetz
    • Jy-Jen F. SahGregory A. HubbardWilliam R. CawthorneXuefeng T. TaoTodd M. Steinmetz
    • F02N11/00
    • F02D41/064F02N11/08F02N2300/102
    • 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.
    • 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。