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公开(公告)号：US09581098B2
公开(公告)日：2017-02-28
申请号：US14939498
申请日：2015-11-12
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin Chen , Xin Yuan , Joshua P. Switkes , Steven E. Carlson , Mark A. Shost
CPC classification number: F02D41/0087 , F02D17/00 , F02D17/02 , F02D37/02 , F02D41/00 , F02D41/0082 , F02D41/0235 , F02D2041/2027 , F02D2250/18 , Y02T10/44
Abstract: Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine appropriate times to conduct selected diagnostics and/or to help better interpret sensor inputs or diagnostic results. In one aspect, selected diagnostics are executed when a single cylinder is fired a plurality of times in isolation relative to a sensor used in the diagnosis. In another aspect, selected diagnostics are conducted while the engine is operated using a firing sequence that insures that no cylinders in a first cylinder bank are fired for a plurality of engine cycles while cylinders in a second bank are at least sometimes fired. The described tests can be conducted opportunistically, when conditions are appropriate, or specific firing sequences can be commanded to achieve the desired isolation or skipping of one or more selected cylinders.
Abstract translation: 描述了用于在车辆被驱动时在发动机的跳过点火操作期间执行发动机诊断的方法和装置。 了解激发序列用于确定适当的时间以进行选定的诊断和/或帮助更好地解释传感器输入或诊断结果。 在一个方面，当单个气缸相对于诊断中使用的传感器被隔离多次时，执行选择的诊断。 在另一方面，当使用确保在第一气缸组中没有气缸在多个发动机循环中被点火的点火顺序来操作发动机时，进行选择的诊断，而在第二组中的气缸至少有时被点火。 所描述的测试可以在条件合适的情况下机会地进行，或者可以命令特定的点火顺序来实现一个或多个选择的气缸的期望的隔离或跳过。
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公开(公告)号：US09562470B2
公开(公告)日：2017-02-07
申请号：US14700494
申请日：2015-04-30
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Shikui Kevin Chen , Li-Chun Chien , Masaki Nagashima , John W. Parsels , Geoff Routledge
IPC: F02B77/08 , G01M15/04 , G01P15/00 , G01L3/00 , F02D41/00 , F02D41/14 , F02D41/22 , F02D13/06 , F02D35/02
CPC classification number: F02B77/082 , F02D13/06 , F02D35/023 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , G01L3/00 , G01M15/042 , G01P15/00 , Y02T10/18 , Y02T10/40
Abstract: Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, a torque model is used to estimate an expected net torque during a selected operating window. The torque model considers an expected torque contribution from each of the cylinders and accounts for the effects of specific skip fire firing decisions that affect the expected torque contribution from each cylinder. A parameter indicative of the actual engine torque is also measured. Valve actuation faults can then be identified based at least in part on a comparison of the measured parameter to an expected parameter value that is based at least in part on the expected net torque. With the described approaches, the occurrence of the valve actuation fault can be made within one engine cycle of the initial occurrence of the fault.
Abstract translation: 描述了用于检测以跳火操作模式操作的内燃机中的阀致动故障的方法和系统。 在一个方面，使用扭矩模型来估计所选操作窗口期间的预期净转矩。 扭矩模型考虑了每个气缸的预期扭矩贡献，并考虑了影响每个气缸的预期转矩贡献的特定跳火点火决定的影响。 还测量了表示实际发动机扭矩的参数。 至少部分地基于测量参数与至少部分地基于预期净转矩的预期参数值的比较来识别阀致动故障。 利用所述方法，可以在故障的初始发生的一个发动机循环内进行气门致动故障的发生。
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公开(公告)号：US09528446B2
公开(公告)日：2016-12-27
申请号：US13654248
申请日：2012-10-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi
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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公开(公告)号：US09399964B2
公开(公告)日：2016-07-26
申请号：US14919011
申请日：2015-10-21
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Louis J. Serrano
CPC classification number: F02D41/0087 , F01L1/047 , F02D11/02 , 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 , F02P5/145 , F02P5/1502 , Y02T10/142 , Y02T10/42
Abstract: In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. A particular level of torque output is selected for each of the fired working chambers. Various methods, arrangements and systems related to the above method are also described.
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175.发明申请公开(公告)号：US20160159364A1
公开(公告)日：2016-06-09
申请号：US15046175
申请日：2016-02-17
Applicant: Tula Technology, Inc.
Inventor： Mark A. WILCUTTS , Xin YUAN , Joshua P. SWITKES , Steven E. CARLSON , John F. IMPEDUGLIA , John W. PARSELS
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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Patent Agency Ranking
公开(公告)号：US20160116371A1
公开(公告)日：2016-04-28
申请号：US14919385
申请日：2015-10-21
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin CHEN , Allan J. KOTWICKI , Joel D. VAN ESS , Robert S. BAILEY , Mohammad R. PIRJABERI
CPC classification number: G01M15/05 , F02M35/1038 , G01M15/09
Abstract: A variety of methods and arrangements for detecting failure of the commanded air induction in an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored. An air induction event generates a fluctuation in the intake manifold pressure, which is recorded. The signal is processed through a diagnostic filter to help determine whether the actual induction matched the commanded induction. In other embodiments, measured crankshaft acceleration is compared with estimated crankshaft acceleration. If the two quantities differ by a threshold amount an induction fault is detected. The two detection methods may also be combined. The describe approaches are particularly well suited for use in engines operating in a skip fire mode with cylinder deactivation and/or a dynamic firing level modulation mode.
Abstract translation: 描述了用于检测内燃机中指令的空气感应故障的各种方法和装置。 在一些实施例中，监测进气歧管压力。 空气感应事件产生记录的进气歧管压力的波动。 信号通过诊断滤波器进行处理，以帮助确定实际感应是否与命令感应相匹配。 在其他实施例中，将测量的曲轴加速度与估计的曲轴加速度进行比较。 如果两个量值相差阈值，则检测到感应故障。 两种检测方法也可以组合。 所描述的方法特别适合于在具有气缸停用和/或动态点火级调制模式的跳火模式下运行的发动机中使用。
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公开(公告)号：US09273643B2
公开(公告)日：2016-03-01
申请号：US13961701
申请日：2013-08-07
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Joshua P. Switkes , Louis J. Serrano
CPC classification number: F02M25/08 , F02D17/02 , F02D29/02 , F02D41/003 , F02D41/0087 , F02D2009/024 , F02D2250/08 , F02D2250/41 , F02M25/089 , F02M35/10222 , F02M35/10229
Abstract: A variety of methods and arrangements are described for selectively reducing intake manifold pressure in a skip fire engine control system. In some embodiments, a throttle is adjusted to generate a manifold vacuum, which is used for various applications, including but not limited to purging a fuel vapor canister, reducing pressure within a brake vacuum booster reservoir and/or venting gas from a crankcase interior. An engine firing fraction is increased to help maintain a desired torque level. Other techniques for reducing the intake manifold pressure are also described, such as applications involving a return to idle.
Abstract translation: 描述了各种方法和布置，用于选择性地减少跳火消防车控制系统中的进气歧管压力。 在一些实施例中，调节节气门以产生歧管真空，其用于各种应用，包括但不限于清除燃料蒸汽罐，降低制动真空助力器容器内的压力和/或从曲轴箱内部排出气体。 发动机点火分数增加以帮助保持期望的转矩水平。 还描述了用于降低进气歧管压力的其它技术，例如涉及返回空转的应用。
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公开(公告)号：US20150367830A1
公开(公告)日：2015-12-24
申请号：US14743581
申请日：2015-06-18
Applicant: Tula Technology Inc.
Inventor： Ihab S. SOLIMAN , Mark A. SHOST
CPC classification number: B60W20/00 , B60W10/06 , F02D17/02 , F02D29/02 , F02D41/3058 , F02D2200/0406 , F02N11/04 , F02N11/0829 , F02N2011/0896 , F02N2200/022 , F02P5/1506 , Y02T10/46 , Y02T10/48 , Y10S903/905
Abstract: A variety of methods and arrangements for implementing a start/stop feature in a skip fire engine control system are described. In one aspect, the implementation of the start/stop feature involves automatically turning off an internal combustion engine under selected circumstances during a drive cycle. A determination is made that the engine should be restarted. During the engine startup period, the engine is operated in a skip fire manner such that a desired engine speed is reached.
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179.发明授权公开(公告)号：US09175613B2
公开(公告)日：2015-11-03
申请号：US14487563
申请日：2014-09-16
Applicant: Tula Technology Inc.
Inventor： John W. Parsels , Matthew A. Younkins , Shikui Kevin Chen
CPC classification number: F02D17/02 , F02D13/06 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , Y02T10/18 , Y02T10/40
Abstract: A variety of methods and devices for controlling the operation of the intake and exhaust valves in an internal combustion engine during skip fire operation are described. In various embodiments, an exhaust valve monitor or other suitable mechanism is used to detect exhaust valve actuation faults. When an exhaust valve actuation fault is detected for a particular cylinder, the corresponding intake valve is deactivated (or not activated) in circumstances when it would otherwise be activated in order to prevent the intake valve from opening into a cylinder that contains high pressure combustion gases. The described approach is particularly beneficial when skip fire operation is combined with cylinder deactivation so that air is not pumped through the cylinders during the skipped working cycles.
Abstract translation: 描述了用于在跳火操作期间控制内燃机中的进气门和排气门的操作的各种方法和装置。 在各种实施例中，使用排气门监视器或其他合适的机构来检测排气门致动故障。 当检测到特定气缸的排气门致动故障时，相应的进气门在其它情况下被停用（或未激活），以防止进气阀打开进入含有高压燃烧气体的气缸 。 所述方法在跳火操作与气缸停用组合时特别有利，使得在跳过的工作循环期间空气不被泵送通过气缸。
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公开(公告)号：US20150233289A1
公开(公告)日：2015-08-20
申请号：US14700494
申请日：2015-04-30
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN , Li-Chun CHIEN , Masaki NAGASHIMA , John W. PARSELS , Geoff ROUTLEDGE
CPC classification number: F02B77/082 , F02D13/06 , F02D35/023 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , G01L3/00 , G01M15/042 , G01P15/00 , Y02T10/18 , Y02T10/40
Abstract: Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, a torque model is used to estimate an expected net torque during a selected operating window. The torque model considers an expected torque contribution from each of the cylinders and accounts for the effects of specific skip fire firing decisions that affect the expected torque contribution from each cylinder. A parameter indicative of the actual engine torque is also measured. Valve actuation faults can then be identified based at least in part on a comparison of the measured parameter to an expected parameter value that is based at least in part on the expected net torque. With the described approaches, the occurrence of the valve actuation fault can be made within one engine cycle of the initial occurrence of the fault.
Abstract translation: 描述了用于检测以跳火操作模式操作的内燃机中的阀致动故障的方法和系统。 在一个方面，使用扭矩模型来估计所选操作窗口期间的预期净转矩。 扭矩模型考虑了每个气缸的预期扭矩贡献，并考虑了影响每个气缸的预期转矩贡献的特定跳火点火决定的影响。 还测量了表示实际发动机扭矩的参数。 至少部分地基于测量参数与至少部分地基于预期净转矩的预期参数值的比较来识别阀致动故障。 利用所述方法，可以在故障的初始发生的一个发动机循环内进行气门致动故障的发生。
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