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    Firing fraction management in skip fire engine control
    11.
    发明授权
    Firing fraction management in skip fire engine control 有权

    公开(公告)号：US10968841B2

    公开(公告)日：2021-04-06

    申请号：US16680030

    申请日：2019-11-11

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi ,  Louis J. Serrano

    IPC: F02D17/02 ,  F02D41/02 ,  F02D13/06 ,  F02D41/00 ,  F02D37/02 ,  F02D41/28

    Abstract: Skip fire engine control using a first order sigma delta based firing controller is described. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The operational firing fraction is selected from a set of available firing fractions. The engine controller uses a first order sigma delta based converter to direct working cycle firings in a skip fire manner that delivers the selected firing fraction. The converter includes or functions substantially equivalent to a first order sigma delta converter and may be implemented any of: algorithmically using a processor; using digital, analog or hybrid components; using a lookup table; or using other appropriate techniques. In some embodiments firing decisions are made on a working cycle by working cycle basis. The described approach may be used in gasoline engines, diesel engines, turbocharged or supercharged engines, or others.

    Induction diagnostics for skip fire engine
    12.
    发明授权
    Induction diagnostics for skip fire engine 有权

    公开(公告)号：US09835522B2

    公开(公告)日：2017-12-05

    申请号：US14919385

    申请日：2015-10-21

    Applicant: Tula Technology Inc.

    Inventor： Shikui Kevin Chen ,  Allan J. Kotwicki ,  Joel D. Van Ess ,  Robert S. Bailey ,  Mohammad R. Pirjaberi

    IPC: G01M15/05 ,  F02M35/10 ,  G01M15/09

    CPC classification number: G01M15/05 ,  F02M35/1038 ,  G01M15/09

    Abstract: A variety of methods and arrangements for detecting failure of the commanded air induction in an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored. An air induction event generates a fluctuation in the intake manifold pressure, which is recorded. The signal is processed through a diagnostic filter to help determine whether the actual induction matched the commanded induction. In other embodiments, measured crankshaft acceleration is compared with estimated crankshaft acceleration. If the two quantities differ by a threshold amount an induction fault is detected. The two detection methods may also be combined. The describe approaches are particularly well suited for use in engines operating in a skip fire mode with cylinder deactivation and/or a dynamic firing level modulation mode.

    Averaging filter for skip fire engine operation
    13.
    发明授权
    Averaging filter for skip fire engine operation 有权
    用于跳过消防车操作的平均过滤器

    公开(公告)号：US09494088B1

    公开(公告)日：2016-11-15

    申请号：US14704747

    申请日：2015-05-05

    Applicant: Tula Technology Inc.

    Inventor： Louis J. Serrano ,  Mohammad R. Pirjaberi ,  Charles H. Loucks

    IPC: F02D17/02 ,  F02D41/00 ,  F02D41/18 ,  G01M15/04

    CPC classification number: F02D17/02 ,  F02D41/0087 ,  F02D41/0097 ,  F02D41/18 ,  F02D2041/0012 ,  F02D2041/1422 ,  F02D2041/1432 ,  F02D2041/286

    Abstract: A variety of methods, devices and filters are described that are suitable for averaging measured power train operating parameters over a period that varies as a function of an engine cylinder firing characteristic such as a current operational firing fraction or firing sequence. The averaged measured operating parameter may be used in a variety of different engine control related functions, calculations and/or operations. The described techniques and devices are particularly well suited for use during skip fire operation of an engine.

    Abstract translation: 描述了各种各样的方法，装置和过滤器，其适用于在作为发动机气缸点火特性（例如当前的操作点火分数或点火顺序）的函数变化的周期内平均测量的动力系运行参数。 平均测量的操作参数可用于各种不同的发动机控制相关功能，计算和/或操作。 所描述的技术和装置特别适用于在发动机的跳火操作期间使用。

    Misfire detection system
    14.
    发明授权
    Misfire detection system 有权
    失火检测系统

    公开(公告)号：US09399963B2

    公开(公告)日：2016-07-26

    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: F02D41/14 ,  F02D41/00 ,  F02D19/06 ,  G01M15/11 ,  F02D41/22 ,  F02D41/30

    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。

    FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL
    15.
    发明申请
    FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL 有权
    飞行火灾发动机控制中的火力分配管理

    公开(公告)号：US20130092127A1

    公开(公告)日：2013-04-18

    申请号：US13654244

    申请日：2012-10-17

    Applicant: TULA TECHNOLOGY, INC.

    Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi ,  Louis J. Serrano

    IPC: F02D17/02 ,  F02P5/15

    CPC classification number: F02D17/02 ,  F02D13/06 ,  F02D37/02 ,  F02D41/0087 ,  F02D2041/286 ,  F02D2200/101

    Abstract: In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the firing fraction is selected from a set of available firing fractions, with the set of available firing fractions varying as a function of engine speed such that more firing fractions are available at higher engine speeds than at lower engine speeds. The controller then direct firings in a skip fire manner that delivers the selected fraction of firings.

    Abstract translation: 在各种描述的实施例中，跳过火控制用于传递期望的发动机输出。 控制器确定跳过火焰射击分数以及（适当地）适合于递送请求的输出的相关联的引擎设置。 在一个方面，燃烧部分选自一组可用的燃烧部分，其中可用的燃烧部分的集合作为发动机速度的函数而变化，使得在较高的发动机转速下比在较低的发动机转速下更多的燃烧部分可用。 然后，控制器以点火方式直接点火，从而提供所选择的点火分数。

    Engine torque smoothing
    17.
    发明授权
    Engine torque smoothing 有权

    公开(公告)号：US10436133B2

    公开(公告)日：2019-10-08

    申请号：US16038622

    申请日：2018-07-18

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. Pirjaberi ,  Kian Eisazadeh-Far ,  Steven E. Carlson ,  Louis J. Serrano

    IPC: F02D41/00 ,  F02D41/30 ,  F02D41/14

    Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable NVH. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. In some embodiments, the hybrid vehicle includes a motor/generator that applies the smoothing torque.

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