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公开(公告)号：US10519876B2
公开(公告)日：2019-12-31
申请号：US16035273
申请日：2018-07-13
Applicant: Tula Technology, Inc.
Inventor： Vijay Srinivasan , Louis J. Serrano , Siamak Hashemi , Robert S. Bailey , Geoffrey Routledge
Abstract: Methods and controllers are described that facilitate the determination of an operational skip fire firing fraction for an engine based at least in part noise levels and/or vehicle vibration levels that are not induced by engine operation. In some embodiments, the firing fraction is determined based at least in part of noise or vibrations associated with road roughness and/or cabin noise levels.
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2.发明授权公开(公告)号：US09581097B2
公开(公告)日：2017-02-28
申请号：US14582008
申请日：2014-12-23
Applicant: Tula Technology Inc.
Inventor： Matthew A. Younkins , John W. Parsels , Joel D. Van Ess , Siamak Hashemi
CPC classification number: F02D41/0087 , F02D2041/0012 , F02P17/12 , F02P2017/123
Abstract: A variety of methods and arrangements for determining whether a high pressure exhaust spring is present in a cylinder of an internal combustion engine are described. For spark ignition engines, the electrical properties of the spark plug spark gap may be used to determine whether a high pressure exhaust spring is present.
Abstract translation: 描述了用于确定高压排气弹簧是否存在于内燃机的气缸中的各种方法和装置。 对于火花点火发动机，可以使用火花塞火花隙的电气特性来确定是否存在高压排气弹簧。
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公开(公告)号：US10107211B2
公开(公告)日：2018-10-23
申请号：US15646476
申请日：2017-07-11
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Louis J. Serrano , Xin Yuan , Steven E. Carlson , Siamak Hashemi , Ryan A. Kuhlenbeck
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.
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Patent Agency Ranking
公开(公告)号：US09745905B2
公开(公告)日：2017-08-29
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.
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公开(公告)号：US09790867B2
公开(公告)日：2017-10-17
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: F02D41/32 , F02D17/02 , F01N11/00 , F02M35/10 , F02D41/00 , F02M25/08 , F02D41/12 , F02D29/02 , F02D9/02
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.
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公开(公告)号：US11352966B2
公开(公告)日：2022-06-07
申请号：US17082981
申请日：2020-10-28
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
Abstract: Controllers and methods for managing transitions into and/or out of a cylinder cut off mode are described. In some embodiments, a skip fire based transition into a cylinder cut off mode is used in which the fraction of working cycles that are fired is gradually reduced to a threshold firing fraction. Once the threshold firing fraction has been reached, all of the working chambers are deactivated.
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公开(公告)号：US20210040904A1
公开(公告)日：2021-02-11
申请号：US17082981
申请日：2020-10-28
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
Abstract: Controllers and methods for managing transitions into and/or out of a cylinder cut off mode are described. In some embodiments, a skip fire based transition into a cylinder cut off mode is used in which the fraction of working cycles that are fired is gradually reduced to a threshold firing fraction. Once the threshold firing fraction has been reached, all of the working chambers are deactivated.
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公开(公告)号：US09399963B2
公开(公告)日：2016-07-26
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
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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