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    DECELERATION CYLINDER CUT-OFF
    6.
    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。

    SKIP FIRE TRANSITION CONTROL
    7.
    发明申请
    SKIP FIRE TRANSITION CONTROL 有权
    跳过火力过渡控制

    公开(公告)号：US20160053697A1

    公开(公告)日：2016-02-25

    申请号：US14857371

    申请日：2015-09-17

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. PIRJABERI ,  Louis J. SERRANO ,  Xin YUAN ,  Steven E. CARLSON ,  Siamak HASHEMI ,  Ryan A. KUHLENBECK

    IPC: F02D37/02 ,  F02D41/18 ,  F02P5/15 ,  F02D41/00

    CPC classification number: F02D37/02 ,  F02D17/02 ,  F02D41/0002 ,  F02D41/0087 ,  F02D2041/286 ,  F02D2200/0406 ,  F02D2200/101 ,  F02P5/1504 ,  Y02T10/42 ,  Y02T10/46

    Abstract: Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions transitions are implemented gradually, preferably in a manner that relatively closely tracks manifold filling dynamics. In some embodiments, the commanded firing fraction is altered each firing opportunity. Another approach contemplates altering the commanded firing fraction by substantially the same amount each firing opportunity for at least a portion of the transition. These approaches work particularly well when the commanded firing fraction is provided to a skip fire controller that includes an accumulator functionality that tracks the portion of a firing that has been requested, but not delivered, or vice versa. In various embodiments, commanded firing fraction changes are delayed relative to initiation of the change in throttle position to help compensate for inherent delays associated with changing the manifold air pressure.

    Abstract translation: 描述了用于在发动机的跳火操作期间控制点火分数之间的转换的方法和布置，以帮助平滑过渡。 通常，逐渐实现燃烧级分过渡，优选地以相对紧密地跟踪歧管填充动力学的方式。 在一些实施例中，命令的射击分数改变每个击发机会。 另一种方法考虑到对于至少一部分转换的每个发射机会基本相同的量来改变命令的射击分数。 当命令的射击分数被提供给跳过火控制器时，这些方法工作特别好，该跳火控制器包括追踪已经被请求但没有被传送的部分射击的累加器功能，反之亦然。 在各种实施例中，指令的点火分数变化相对于开始节气门位置的改变而延迟，以帮助补偿与改变歧管空气压力相关联的固有延迟。

    MISFIRE DETECTION SYSTEM
    8.
    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。

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