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    Method of controlling cyclic variation in engine combustion
    4.
    发明授权
    Method of controlling cyclic variation in engine combustion 失效
    控制发动机燃烧循环变化的方法

    公开(公告)号：US5921221A

    公开(公告)日：1999-07-13

    申请号：US75291

    申请日：1998-05-08

    申请人： Leighton Ira Davis, Jr. ,  Charles Stuart Daw ,  Lee Albert Feldkamp ,  John William Hoard ,  Fumin Yuan ,  Francis Thomas Connolly

    发明人： Leighton Ira Davis, Jr. ,  Charles Stuart Daw ,  Lee Albert Feldkamp ,  John William Hoard ,  Fumin Yuan ,  Francis Thomas Connolly

    IPC分类号： F02D41/14 ,  F02M7/00

    CPC分类号： F02D41/1498 ,  F02D2200/1012 ,  F02D2200/1015

    摘要： Cyclic variation in combustion of a lean burning engine is reduced by detecting an engine combustion event output such as torsional acceleration in a cylinder (i) at a combustion event (k), using the detected acceleration to predict a target acceleration for the cylinder at the next combustion event (k+1), modifying the target output by a correction term that is inversely proportional to the average phase of the combustion event output of cylinder (i) and calculating a control output such as fuel pulse width or spark timing necessary to achieve the target acceleration for cylinder (i) at combustion event (k+1) based on anti-correlation with the detected acceleration and spill-over effects from fueling.

    摘要翻译： 通过使用检测到的加速度来检测在燃烧事件（k）中的气缸（i）中的扭转加速度的发动机燃烧事件输出来减少燃烧发动机的燃烧中的循环变化，以预测气缸 下一个燃烧事件（k + 1），通过与气缸（i）的燃烧事件输出的平均相位成反比的校正项来修正目标输出，并计算诸如燃料脉冲宽度或火花时间之类的控制输出， 基于与检测到的加速和加油溢出效应的反相关，实现燃烧事件（k + 1）下气缸（i）的目标加速度。

    Combustion diagnostic for active engine feedback control
    5.
    发明授权
    Combustion diagnostic for active engine feedback control 失效
    用于主动发动机反馈控制的燃烧诊断

    公开(公告)号：US07277790B1

    公开(公告)日：2007-10-02

    申请号：US11380019

    申请日：2006-04-25

    申请人： Johney Boyd Green, Jr. ,  Charles Stuart Daw ,  Robert Milton Wagner

    发明人： Johney Boyd Green, Jr. ,  Charles Stuart Daw ,  Robert Milton Wagner

    IPC分类号： G06G7/70 ,  F01L1/34

    CPC分类号： F02D41/3035 ,  F02B77/085 ,  F02D35/023 ,  F02D35/025 ,  F02D35/028 ,  F02D41/0057 ,  F02D41/401 ,  F02D2041/0017 ,  Y02T10/44

    摘要： This invention detects the crank angle location where combustion switches from premixed to diffusion, referred to as the transition index, and uses that location to define integration limits that measure the portions of heat released during the combustion process that occur during the premixed and diffusion phases. Those integrated premixed and diffusion values are used to develop a metric referred to as the combustion index. The combustion index is defined as the integrated diffusion contribution divided by the integrated premixed contribution. As the EGR rate is increased enough to enter the low temperature combustion regime, PM emissions decrease because more of the combustion process is occurring over the premixed portion of the heat release rate profile and the diffusion portion has been significantly reduced. This information is used to detect when the engine is or is not operating in a low temperature combustion mode and provides that feedback to an engine control algorithm.

    摘要翻译： 本发明检测燃烧切换从预混合到扩散的曲柄角位置，称为过渡指数，并且使用该位置来定义测量在预混合和扩散阶段期间发生的燃烧过程期间释放的热的部分的积分极限。 这些综合预混和扩散值用于开发一种称为燃烧指数的指标。 燃烧指数定义为综合扩散贡献除以综合预混合贡献。 随着EGR率增加到足以进入低温燃烧状态，由于更多的燃烧过程发生在放热速率分布的预混合部分上并且扩散部分已经显着减少，PM排放减少。 该信息用于检测发动机何时或不在低温燃烧模式下运行，并将该反馈提供给发动机控制算法。