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    DECELERATION CYLINDER CUT-OFF
    23.
    发明申请
    DECELERATION CYLINDER CUT-OFF 有权
    减速缸切断

    公开(公告)号：US20160146121A1

    公开(公告)日：2016-05-26

    申请号：US15009533

    申请日：2016-01-28

    Applicant: Tula Technology, Inc.

    Inventor： Steven E. CARLSON ,  Xin YUAN ,  Siamak HASHEMI ,  Vijay SRINIVASAN ,  Srihari KALLURI ,  Andrew W. PHILLIPS ,  Mark A. WILCUTTS ,  Louis J. SERRANO ,  Shikui Kevin CHEN

    IPC: F02D17/02 ,  F01N11/00

    CPC classification number: F02D17/02 ,  F01N11/007 ,  F02D29/02 ,  F02D41/003 ,  F02D41/0087 ,  F02D41/126 ,  F02D2009/024 ,  F02D2041/0012 ,  F02D2200/0406 ,  F02D2250/08 ,  F02D2250/41 ,  F02M25/089 ,  F02M35/10222 ,  F02M35/10229

    Abstract: Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. In another aspect, transitions from DCCO, involve the use of an air pumping skip fire operational mode. After the manifold pressure has been reduced, the engine may transition to either a cylinder deactivation skip fire operational mode or other appropriate operational mode. In yet another aspect a method of transitioning into DCCO using a skip fire approach is described. In this aspect, the fraction of the working cycles that are fired is gradually reduced to a threshold firing fraction. All of the working chambers are then deactivated after reaching the threshold firing fraction.

    Abstract translation: 描述了在减速气缸截止（DCCO）状态和操作状态之间转换发动机的方法和装置。 在一个方面，来自DCCO的过渡开始于重新激活气缸以泵送空气以在点燃任何气缸之前减小进气歧管中的压力。 在另一方面，来自DCCO的过渡涉及使用空气泵送跳火操作模式。 在歧管压力降低之后，发动机可以转变到气缸停用跳火操作模式或其他适当的操作模式。 在另一方面，描述了使用跳跃火方式转换到DCCO的方法。 在这方面，被烧制的工作循环的分数逐渐降低到阈值燃烧分数。 然后在达到阈值点火分数之后，所有的工作室都被停用。

    MISFIRE DETECTION SYSTEM
    24.
    发明申请
    MISFIRE DETECTION SYSTEM 有权
    MISFIRE检测系统

    公开(公告)号：US20140261317A1

    公开(公告)日：2014-09-18

    申请号：US14207109

    申请日：2014-03-12

    Applicant: Tula Technology Inc.

    Inventor： Charles H. LOUCKS ,  Joel D. VAN ESS ,  Siamak HASHEMI ,  Louis J. SERRANO ,  Mohammad R. PIRJABERI ,  Shikui Kevin CHEN ,  Matthew A. YOUNKINS ,  Mark A. SHOST ,  Mark A. WILCUTTS

    IPC: F02D35/02

    CPC classification number: F02D41/0087 ,  F02D19/0623 ,  F02D41/22 ,  F02D41/3058 ,  F02D2200/025 ,  F02D2200/1004 ,  F02D2200/101 ,  F02D2200/1012 ,  F02D2200/1015 ,  F02D2250/14 ,  G01M15/11

    Abstract: A variety of methods and arrangements for detecting misfire in a skip fire engine control system are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. A change in an engine parameter is measured during the window. A determination is made as to whether a firing opportunity before the target firing opportunity is a skip or a fire and/or whether a firing opportunity after the target firing opportunity is a skip or a fire. Based at least in part on this skip/fire determination, a determination is made as to whether the target working chamber has misfired. In various embodiments, if the target working chamber is identified as persistently misfiring, the firing sequence is modified so that the target working chamber is deactivated and excluded from the firing sequence. In still other embodiments, a torque model is used to detect engine-related problems.

    Abstract translation: 描述了用于检测跳火消防车控制系统中的失火的各种方法和装置。 在一个方面，将窗口分配给目标工作室的目标发射机会。 在窗口期间测量发动机参数的变化。 确定目标射击机会之前的射击机会是否是跳跃或火灾，和/或目标射击机会之后的射击机会是否是跳跃或火灾。 至少部分地基于该跳过/确定，确定目标工作室是否失火。 在各种实施例中，如果目标工作室被识别为持续地失火，则对燃烧序列进行修改，使得目标工作室被停用并从烧制序列中排除。 在其他实施例中，使用扭矩模型来检测发动机相关问题。

    ENGINE DIAGNOSTICS WITH SKIP FIRE CONTROL
    25.
    发明申请
    ENGINE DIAGNOSTICS WITH SKIP FIRE CONTROL 有权
    发动机诊断与飞行防火

    公开(公告)号：US20140261309A1

    公开(公告)日：2014-09-18

    申请号：US14206918

    申请日：2014-03-12

    Applicant: Tula Technology Inc.

    Inventor： Shikui Kevin CHEN ,  Xin YUAN ,  Joshua P. SWITKES ,  Steven E. CARLSON ,  Mark A. SHOST

    IPC: F02D17/02

    CPC classification number: F02D41/0087 ,  F02D17/00 ,  F02D17/02 ,  F02D37/02 ,  F02D41/00 ,  F02D41/0082 ,  F02D41/0235 ,  F02D2041/2027 ,  F02D2250/18 ,  Y02T10/44

    Abstract: Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine appropriate times to conduct selected diagnostics and/or to help better interpret sensor inputs or diagnostic results. In one aspect, selected diagnostics are executed when a single cylinder is fired a plurality of times in isolation relative to a sensor used in the diagnosis. In another aspect, selected diagnostics are conducted while the engine is operated using a firing sequence that insures that no cylinders in a first cylinder bank are fired for a plurality of engine cycles while cylinders in a second bank are at least sometimes fired. The described tests can be conducted opportunistically, when conditions are appropriate, or specific firing sequences can be commanded to achieve the desired isolation or skipping of one or more selected cylinders.

    Abstract translation: 描述了用于在车辆被驱动时在发动机的跳过点火操作期间执行发动机诊断的方法和装置。 了解激发序列用于确定适当的时间以进行选定的诊断和/或帮助更好地解释传感器输入或诊断结果。 在一个方面，当单个气缸相对于诊断中使用的传感器被隔离多次时，执行选择的诊断。 在另一方面，当使用确保在第一气缸组中没有气缸在多个发动机循环中被点火的点火顺序来操作发动机时，进行选择的诊断，而在第二组中的气缸至少有时被点火。 所描述的测试可以在条件合适的情况下机会地进行，或者可以命令特定的点火顺序来实现一个或多个选择的气缸的期望的隔离或跳过。

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