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公开(公告)号：US20190145329A1
公开(公告)日：2019-05-16
申请号：US16246888
申请日：2019-01-14
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US20170122237A1
公开(公告)日：2017-05-04
申请号：US15401516
申请日：2017-01-09
Applicant: Tula Technology, Inc.
Inventor： Adya S. TRIPATHI , Chester J. SILVESTRI , Christopher W. CHANDLER , Christopher C. HAND , Joshua P. SWITKES , Mark A. WILCUTTS , Matthew A. YOUNKINS
CPC classification number: F02D41/0087 , F02B75/02 , F02B2075/027 , F02D13/06 , F02D17/02 , F02D37/02 , F02D41/1401 , F02D41/26 , F02D41/266 , F02D41/30 , F02D2200/0614 , F02D2200/602 , F02D2250/18 , F02D2400/02 , F02P5/045 , F02P5/1512 , Y02T10/46
Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles.
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13.发明申请公开(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。
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公开(公告)号：US20200040788A1
公开(公告)日：2020-02-06
申请号：US16654373
申请日：2019-10-16
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN , Mark A. WILCUTTS
Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.
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公开(公告)号：US20170370310A1
公开(公告)日：2017-12-28
申请号：US15628309
申请日：2017-06-20
Applicant: Tula Technology, Inc.
Inventor： Allan J. KOTWICKI , Joel D. VAN ESS , Mark A. WILCUTTS
CPC classification number: F02D41/0087 , F02D13/06 , F02D17/02 , F02D41/1401 , F02D41/1402 , F02D41/182 , F02D2041/1436 , F02D2200/0402 , F02D2200/0408 , F02P5/1512 , Y02T10/18
Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating working chamber air charge during engine operations. The described approaches and devices are well suited for use in dynamic firing level modulation controlled engines. Manifold pressure is estimated for a time corresponding to an induction event associated with a selected working cycle. The manifold pressure estimate accounts for impacts from one or more intervening potential induction events that will occur between the time that the manifold pressure is estimated and the time that the induction event associated with the selected working cycle occurs. The estimated manifold pressure is used in the estimation of the air charge for the selected working cycle. The described approach may be used to individually calculate the air charge for each induction event at any time that the engine is operating in a mode that can benefit from the individual cylinder air charge estimations.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20160377007A9
公开(公告)日：2016-12-29
申请号：US13843567
申请日：2013-03-15
Applicant: TULA TECHNOLOGY, INC.
Inventor： Mark A. WILCUTTS , Xin YUAN , Joshua P. SWITKES , Li-Chun CHIEN , Steven E. CARLSON , Christopher W. CHANDLER , Christopher C. Hand , Matthew A. YOUNKINS , Adya S. Tripathi
IPC: F02D41/00
CPC classification number: F02D41/0087 , F02D41/3058 , F02D2200/0614
Abstract: Various methods and arrangements for determining a combustion control parameter for a working chamber in an engine are described. In one aspect, an engine controller includes a firing counter that stores a firing history for the working chamber. A combustion control module is used to determine a combustion control parameter, which is used to help manage combustion in the working chamber. The combustion control parameter is determined based at least in part on the firing history.
Abstract translation: 描述了用于确定发动机中的工作室的燃烧控制参数的各种方法和装置。 一方面，发动机控制器包括存储工作室的击发历史的发射计数器。 燃烧控制模块用于确定燃烧控制参数，其用于帮助管理工作室中的燃烧。 至少部分地基于击发历史来确定燃烧控制参数。
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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
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。
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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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公开(公告)号：US20210071605A1
公开(公告)日：2021-03-11
申请号：US17064354
申请日：2020-10-06
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US20180163650A1
公开(公告)日：2018-06-14
申请号：US15894548
申请日：2018-02-12
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Vijay SRINIVASAN , Geoffrey ROUTLEDGE , Mark A. SHOST , Biswa R. GHOSH , Mark A. WILCUTTS , Matthew A. YOUNKINS
IPC: F02D41/00 , F02D13/02 , F02D41/04 , F02D13/06 , F02P5/15 , F02D41/26 , F01L1/047 , F02P5/145 , F02D41/12 , F02D41/10 , F02D17/02
CPC classification number: F02D41/0087 , F01L1/047 , F02D13/0223 , F02D13/0273 , F02D13/06 , F02D17/02 , F02D41/0002 , F02D41/008 , F02D41/04 , F02D41/107 , F02D41/123 , F02D41/26 , F02D2041/001 , F02D2041/0012 , F02D2250/18 , F02N11/0837 , F02P5/145 , F02P5/15 , F02P5/1502 , F02P9/002 , F16F15/02 , G10K11/16 , G10K11/1785 , G10K11/17883 , G10K2210/1282 , G10K2210/3211 , G10K2210/3212 , Y02T10/142 , Y02T10/42
Abstract: Systems and methods for reducing noise or vibration generated by an internal combustion engine are described. An engine controller is arranged to operate the working chambers of the engine in a cylinder output level modulation manner. A noise/vibration reduction unit actively control of a device that is not a part of the powertrain. The device is controlled in a feed forward manner to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a characteristic of the cylinder output level modulation operation of the engine.
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