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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。
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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
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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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：US20140041625A1
公开(公告)日：2014-02-13
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
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。
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公开(公告)号：US20210199060A1
公开(公告)日：2021-07-01
申请号：US17192252
申请日：2021-03-04
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Adya S. TRIPATHI , Louis J. SERRANO
Abstract: Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The engine controller selects an operational firing fraction from a set of available firing fractions. A firing controller then directs cylinder firings in a skip fire manner that delivers the selected operational firing fraction. The firing controller includes an accumulator that helps smooth transitions between different firing fractions.
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Patent Agency Ranking
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：US20180320615A1
公开(公告)日：2018-11-08
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
CPC classification number: F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012 , Y02T10/42
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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公开(公告)号：US20170370342A1
公开(公告)日：2017-12-28
申请号：US15697639
申请日：2017-09-07
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO
CPC classification number: F02P5/145 , F02D11/105 , F02D13/02 , F02D17/02 , F02D37/02 , F02D41/0002 , F02D41/0087 , F02D2041/001 , F02D2041/141 , F02D2041/1431 , F02D2200/0406 , F02D2200/1004 , F02D2250/21 , Y02T10/42
Abstract: A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.
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公开(公告)号：US20170067401A1
公开(公告)日：2017-03-09
申请号：US15357398
申请日：2016-11-21
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Adya S. TRIPATHI , Louis J. SERRANO
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 skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations.
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，跳过火控制器布置成选择具有重复的发射周期长度的基本点火分数，其将以当前发动机转速每秒重复至少指定次数。 这种布置可以有助于减少不期望的振动的发生。
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20.发明申请NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM 审中-公开噪声，振动和谐波减少在一个飞行火灾发动机控制系统公开(公告)号：US20170051689A1
公开(公告)日：2017-02-23
申请号：US15340291
申请日：2016-11-01
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
CPC classification number: F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012
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.
Abstract translation: 描述了用于减少跳火消防车控制系统中的噪声，振动和粗糙度（NVH）的各种方法和装置。 在一个方面，使用点火顺序来以跳火方式操作发动机。确定由能量存储/释放装置施加到动力系的平滑转矩。 平滑扭矩被布置成至少部分抵消由跳过火焰点火序列产生的扭矩的变化。 还描述了与上述操作相关的各种方法，动力系统控制器，布置和计算机软件。
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