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    TRANSITORY TORQUE MODIFICATIONS USING SKIP FIRE CONTROL
    21.
    发明申请
    TRANSITORY TORQUE MODIFICATIONS USING SKIP FIRE CONTROL 有权
    使用跳过火灾控制的异动转矩修正

    公开(公告)号：US20140045652A1

    公开(公告)日：2014-02-13

    申请号：US13963744

    申请日：2013-08-09

    Applicant: Tula Technology, Inc.

    Inventor： Steven E. CARLSON ,  Xin YUAN ,  Joshua P. SWITKES ,  Li-Chun CHIEN

    IPC: B60W10/06 ,  B60W10/11

    CPC classification number: B60W10/06 ,  B60W10/11 ,  B60W30/19 ,  F02D41/0087 ,  F02D41/023 ,  F02D41/1497 ,  F02D2250/18 ,  F02D2250/21 ,  F02P5/1504 ,  F02P5/1512 ,  F02P9/005 ,  F16H63/502 ,  Y02T10/46 ,  Y10T477/677

    Abstract: Methods and devices are described that utilize skip fire techniques to rapidly meet requests for transitory changes in the output of an engine. Specifically, the fraction or percentage of the working cycles that are fired can be changed during a transitory event so that the engine delivers the desired transitory engine output. Once the transitory event is over, normal engine operation may be restored. The described techniques are useful in a variety of applications that require a relatively quick, but transitory, reduction in engine output to meet vehicle control requirements. One particularly useful application is during transmission shift events. Other representative applications include: loss of traction events, stability control events, wheel hop prevention events, etc.

    Abstract translation: 描述了利用跳火技术快速满足对发动机的输出的暂时变化的请求的方法和装置。 具体地说，在瞬态事件期间可以改变被激发的工作循环的分数或百分比，以便发动机输出期望的暂时发动机输出。 一旦暂时事件结束，可以恢复正常的发动机运转。 所描述的技术在各种应用中是有用的，其需要相对快速但短暂的发动机输出的降低以满足车辆控制要求。 一个特别有用的应用是传输移位事件。 其他代表性应用包括：牵引事件的损失，稳定性控制事件，防止跳闸事件等。

    ENGINE BRAKING CONTROLLER
    22.
    发明申请
    ENGINE BRAKING CONTROLLER 有权
    发动机制动控制器

    公开(公告)号：US20140034010A1

    公开(公告)日：2014-02-06

    申请号：US13953615

    申请日：2013-07-29

    Applicant: Tula Technology, Inc.

    Inventor： Louis J. SERRANO ,  Steven E. CARLSON ,  Joshua P. SWITKES ,  Ronald D. YUILLE

    IPC: F02D17/02

    CPC classification number: F02D17/02 ,  F02D13/0203 ,  F02D13/04 ,  F02D41/0005 ,  F02D41/0087 ,  F02D41/123

    Abstract: In one aspect of the invention, an engine is operated in a skip cylinder engine braking mode. In the skip cylinder engine braking mode, selected working cycles of selected working chambers are deactivated. Other selected working cycles of the selected working chambers are operated in a braking mode. Accordingly, individual working chambers are sometimes deactivated and sometimes operated in the braking mode while the engine is operating in the skip cylinder engine braking mode. Various methods for cylinder control are described, which improve fuel economy, catalytic converter performance, and vehicle NVH characteristics.

    Abstract translation: 在本发明的一个方面，发动机以跳过气缸发动机制动模式操作。 在跳过气缸发动机制动模式下，所选择的工作室的选定工作循环被停用。 所选择的工作室的其他选定的工作循环在制动模式下操作。 因此，当发动机以跳过气缸发动机制动模式运行时，单个工作室有时被停用并且有时在制动模式下操作。 描述了用于气缸控制的各种方法，其提高燃料经济性，催化转化器性能和车辆NVH特性。

    USING SKIP FIRE WITH POWER TAKE-OFF
    23.
    发明申请
    USING SKIP FIRE WITH POWER TAKE-OFF 有权

    公开(公告)号：US20220009348A1

    公开(公告)日：2022-01-13

    申请号：US16926174

    申请日：2020-07-10

    Applicant: Tula Technology, Inc. ,  Cummins Inc.

    Inventor： J. Steven KOLHOUSE ,  Lisa A. ORTH-FARRELL ,  Steven E. CARLSON ,  Aaron W. BEINBORN

    IPC: B60K17/28 ,  F02D41/02 ,  B60K17/02 ,  F01N11/00 ,  F02D17/02 ,  B60N2/00

    Abstract: Engine controllers and control schemes that facilitate skip fire engine operation in conjunction with use power take-off devices are described. In one aspect, a skip fire mode is exited when the power take-off unit is engaged and the current torque request exceeds a torque threshold. In some embodiments, the exit is delayed when the temperature of an after treatment system is below a designated temperature threshold. In another aspect, the engine transitions to the skip fire mode when the power take-off unit disengages. In some embodiments, exiting is conditioned on the current torque request being less than a torque threshold. In some embodiments, the transition is made immediately, whereas in others the transition only occurs when the power take-off unit is not reengaged for a period of time or is further conditioned on determining that the power take-off unit is likely to remain disengaged for the period of time.

    ENGINE TORQUE SMOOTHING
    24.
    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
    28.
    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
    29.
    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
    30.
    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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