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    FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL
    41.
    发明申请
    FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL 审中-公开

    公开(公告)号：US20200080500A1

    公开(公告)日：2020-03-12

    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 ,  F02D13/06 ,  F02D41/00

    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.

    ENGINE TORQUE SMOOTHING
    43.
    发明申请
    ENGINE TORQUE SMOOTHING 审中-公开

    公开(公告)号：US20190178180A1

    公开(公告)日：2019-06-13

    申请号：US16278075

    申请日：2019-02-16

    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.

    FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL
    46.
    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：US20160363062A9

    公开(公告)日：2016-12-15

    申请号：US13963686

    申请日：2013-08-09

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. PIRJABERI ,  Steven E. CARLSON ,  Louis J. SERRANO ,  Xin YUAN ,  Li-Chun CHIEN ,  Adya S. TRIPATHI

    IPC: F02D41/00

    CPC classification number: F02D41/00 ,  F02D11/105 ,  F02D17/02 ,  F02D41/0087 ,  F02D41/0225 ,  F02D41/2422 ,  F02D2250/18

    Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.

    Abstract translation: 所描述的实施例总体上涉及跳过内燃机的火灾控制，特别涉及用于确定期望的操作燃烧部分的机构。 在一些实施例中，排放分数确定单元布置成确定适于递送所要求的发动机输出的点火分数。 射击分数确定单元可以在确定期望的击发分数时利用诸如查找表的数据结构。 在一个方面，将期望的发动机输出和一个或多个操作动力系参数（例如当前发动机转速）用作用于选择期望的发动部分的查找表的索引。 在其他实施例中，数据结构的附加索引可以包括以下任何一个：传动齿轮; 歧管绝对压力（MAP）; 歧管空气温度; 指示质量空气充注（MAC）的参数; 凸轮位置 气缸扭矩输出; 最大允许歧管压力; 车速; 和大气压力。

    DECELERATION CYLINDER CUT-OFF
    48.
    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
    50.
    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。

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