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    • 4. 发明申请
    • Multi-stage compression ignition engine start
    • 多级压缩点火发动机起动
    • US20050252474A1
    • 2005-11-17
    • US10846013
    • 2004-05-14
    • Jy-Jen SahGregory HubbardWilliam CawthorneXuefeng TaoTodd Steinmetz
    • Jy-Jen SahGregory HubbardWilliam CawthorneXuefeng TaoTodd Steinmetz
    • F02D41/06F02N11/00F02N11/08F02N15/00F02N99/00F02N17/00
    • 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。
    • 10. 发明申请
    • Method of determining the derivative of an input signal
    • 确定输入信号的导数的方法
    • US20050256919A1
    • 2005-11-17
    • US10846018
    • 2004-05-14
    • William CawthorneJy-Jen Sah
    • William CawthorneJy-Jen Sah
    • G01D1/10G01D3/028G01P15/16G06F7/38
    • G01D3/028
    • The derivative of a noise-containing input signal is determined by using an aliased derivative to periodically reset a filtered version of a normally determined derivative. The aliased derivative is calculated using a slower update or sampling rate than the normally determined derivative, and the filtered version of the normally determined derivative is reset to a reset value at each update of the aliased derivative. The reset value is based on a weighted sum of the aliased derivative and the filter output. The periodically reset filter output closely follows an idealized derivative of the input signal, substantially eliminating the phase delay introduced by conventional filtering.
    • 含噪声输入信号的导数通过使用混叠导数来定期复位正常确定的导数的滤波版本来确定。 使用比正常确定的导数更慢的更新或采样率来计算混叠导数,并且在每个更新别名导数时将正确确定的导数的滤波器版本重置为复位值。 复位值基于混叠导数和滤波器输出的加权和。 周期性复位滤波器输出紧跟输入信号的理想导数,基本上消除了传统滤波引入的相位延迟。