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    Firing fraction management in skip fire engine control
    121.
    发明授权
    Firing fraction management in skip fire engine control 有权
    点火发动机控制中的点火部分管理

    公开(公告)号：US09086020B2

    公开(公告)日：2015-07-21

    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 ,  F02D41/00 ,  F02D13/06 ,  F02P5/15 ,  G06F17/00 ,  F02D37/02 ,  F02D41/28

    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。

    Control of a partial cylinder deactivation engine
    122.
    发明授权
    Control of a partial cylinder deactivation engine 有权
    部分气缸停用发动机的控制

    公开(公告)号：US08839766B2

    公开(公告)日：2014-09-23

    申请号：US13799389

    申请日：2013-03-13

    Applicant: Tula Technology, Inc.

    Inventor： Louis J. Serrano

    IPC: F02D17/02 ,  F02D41/00

    CPC classification number: F02D41/0087 ,  F02D2250/21

    Abstract: A variety of methods and arrangements for managing transitions between operating states for an engine are described. In one aspect, an engine is operated in a particular operating state. A transition is made to another operating state. During that transition, the engine is operated in a skip fire manner.

    Abstract translation: 描述了用于管理用于发动机的操作状态之间的转换的各种方法和布置。 在一个方面，发动机在特定的操作状态下操作。 转换到另一个操作状态。 在过渡期间，发动机以跳火方式运行。

    DRIVE TRAIN SLIP FOR VIBRATION MITIGATION DURING SKIP FIRE OPERATION
    123.
    发明申请
    DRIVE TRAIN SLIP FOR VIBRATION MITIGATION DURING SKIP FIRE OPERATION 有权
    用于在飞行员操作期间进行振动缓解的驱动滑轨

    公开(公告)号：US20140041626A1

    公开(公告)日：2014-02-13

    申请号：US13963819

    申请日：2013-08-09

    Applicant: Tula Technology, Inc.

    Inventor： Mark A. WILCUTTS ,  Xin YUAN ,  Joshua P. SWITKES ,  Steven E. CARLSON ,  John F. IMPEDUGLIA ,  John W. PARSELS

    IPC: F02D41/00

    CPC classification number: B60W30/20 ,  B60W10/026 ,  B60W10/08 ,  B60W2030/203 ,  B60W2710/025 ,  F02D11/105 ,  F02D41/00 ,  F02D41/0087 ,  F02D41/022 ,  F02D41/18 ,  F02D2250/18

    Abstract: A variety of methods and devices for mitigating power train vibration during skip fire operation of an engine are described. In one aspect, the slip of a drive train component (such as a torque converter clutch) is based at least in part upon a skip fire characteristic (such as firing fraction, selected firing sequence/pattern, etc.) during skip fire operation of an engine. The modulation of the drive train component slip can also be varied as a function of one or more engine operating parameters such as engine speed and/or a parameter indicative of the output of fired cylinders (such as mass air charge).

    Abstract translation: 描述了用于减轻发动机的跳火操作期间的动力传动系振动的各种方法和装置。 一方面，传动系部件（例如变矩器离合器）的滑动至少部分地基于跳过火焰运行期间的跳火特性（例如点火分数，选择的点火顺序/图案等） 一个引擎 传动系组件滑动的调制也可以作为一个或多个发动机操作参数（诸如发动机转速和/或指示燃烧气缸的输出的参数（例如大气压））的函数而变化。

    Managing engine firing fraction changes during gear shifts
    125.
    发明授权
    Managing engine firing fraction changes during gear shifts 有权

    公开(公告)号：US11685380B1

    公开(公告)日：2023-06-27

    申请号：US17576160

    申请日：2022-01-14

    Applicant: Tula Technology, Inc.

    Inventor： Louis J. Serrano ,  Xiaoping Cai ,  Andrew W. Phillips

    IPC: B60W30/19 ,  F02D41/02 ,  F02D41/00 ,  B60W10/06 ,  B60W10/11

    CPC classification number: B60W30/19 ,  B60W10/06 ,  B60W10/11 ,  F02D41/0087 ,  F02D41/0225 ,  F02D2200/101 ,  F02D2200/501

    Abstract: Methods and controllers for controlling engine speed to reduce NVH that occurs in conjunction with transmission shifts are described. In some embodiments, when a transmission shift to a target gear is expected, a target engine speed appropriate for the target gear is first determined. A target rate of change of the engine speed is calculated from the initial engine speed and target engine speed in conjunction with a target transition time. A target torque is then calculated from the target rate of change of engine speed. A target firing fraction or induction ratio are determined that are desired for use with the target engine speed based on the target torque. The transition to the target engine speed and target firing fraction or induction ratio are completed before the gear shift is completed. The described approaches are well suited for use during skip fire or other cylinder output level modulation operation of the engine.

    Motor torque smoothing for recharging events on combustion engines
    127.
    发明授权
    Motor torque smoothing for recharging events on combustion engines 有权

    公开(公告)号：US11560135B2

    公开(公告)日：2023-01-24

    申请号：US17531437

    申请日：2021-11-19

    Applicant: Tula Technology, Inc.

    Inventor： Vijay Srinivasan ,  Louis Joseph Serrano

    IPC: B60T1/00 ,  B60W20/13 ,  B60W20/15 ,  F02P9/00 ,  F02D13/02 ,  F02D13/04 ,  B60W10/06 ,  F02D41/00 ,  F02D41/14 ,  B60W10/08

    Abstract: Methods, systems, and devices for managing motor torque smoothing for internal combustion engine cylinder recharging events are described herein. An engine controller in a vehicle for managing motor torque smoothing for internal combustion engine cylinder recharging events may be configured to operate the internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders are not designated to be fired, determine a recharge event time period where a particular one of the cylinders that have not been designated to be fired is recharged, identify a disruption quantity of torque during the recharging event time period, and actuate an additional motor to initiate a supplemental quantity of torque during the recharge event time period based on the disruption quantity of torque.

    Systems and methods to minimize emissions spikes when reactivating or deactivating a combustion cylinder
    130.
    发明授权
    Systems and methods to minimize emissions spikes when reactivating or deactivating a combustion cylinder 有权

    公开(公告)号：US11499490B1

    公开(公告)日：2022-11-15

    申请号：US17544568

    申请日：2021-12-07

    Applicant: Cummins Inc. ,  Tula Technology, Inc.

    Inventor： J. Steven Kolhouse ,  Avra Brahma

    IPC: F02D41/00 ,  F02D13/02 ,  F02D41/14 ,  F01L13/00

    Abstract: Systems and methods for mitigating exhaust gas emissions via cylinder deactivation are provided. A system includes a controller coupled to an internal combustion engine and an electric motive device. The controller includes a processor and a memory coupled to the processor. The memory stores instruction that, when executed by the processor, cause the controller to: command the internal combustion engine to operate in a cylinder deactivation mode whereby at least one cylinder of a plurality of cylinders of the internal combustion engine is deactivated; receive a power request exceeding a current power output from the internal combustion engine; command the electric motive device to provide a supplemental power output based on the received power request; and, subsequent to commanding the electric motive device to provide the supplemental power out, activate the at least one cylinder of the plurality of cylinders of the internal combustion engine.

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