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公开(公告)号：US20160061127A1
公开(公告)日：2016-03-03
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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12.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：US20220074361A1
公开(公告)日：2022-03-10
申请号：US17530179
申请日：2021-11-18
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Kian EISAZADEH-FAR , Steven E. CARLSON , Louis J. SERRANO
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：US20170342921A1
公开(公告)日：2017-11-30
申请号：US15679462
申请日：2017-08-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Kian EISAZADEH-FAR , Steven E. CARLSON , Louis J. SERRANO , Ying REN , Joel D. VAN ESS
CPC classification number: F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012
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：US20170306864A1
公开(公告)日：2017-10-26
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
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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Patent Agency Ranking
16.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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公开(公告)号：US20150211472A1
公开(公告)日：2015-07-30
申请号：US14568408
申请日：2014-12-12
Applicant: Tula Technology Inc.
Inventor： Steven E. CARLSON
CPC classification number: F02P5/1522 , F02D17/02 , F02D41/0087 , F02D41/027 , F02P5/1523 , Y02T10/46
Abstract: In one aspect, a method for mitigating detonation in a skip fire engine control system is described. The working chambers of the engine are operated in a skip fire manner to deliver a desired torque. One or more detonations are detected in the engine. In response to the detection of the one or more detonations, the spark timing for one or more of the working chambers is retarded. Additionally, the firing fraction used to operate the engine is increased. The increase in the firing fraction helps to compensate for torque lost due to the retarding of the spark timing.
Abstract translation: 一方面，描述了一种用于减轻跳火消防车控制系统中的爆震的方法。 发动机的工作室以跳火方式操作以提供期望的扭矩。 在发动机中检测到一个或多个爆震。 响应于一个或多个爆震的检测，一个或多个工作室的火花正时被延迟。 此外，用于操作发动机的燃烧部分增加。 燃烧分数的增加有助于补偿由于火花正时延迟引起的扭矩损失。
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公开(公告)号：US20140041630A1
公开(公告)日：2014-02-13
申请号：US13963759
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Steven E. CARLSON , Xin YUAN , Louis J. SERRANO , Joshua P. SWITKES , Biswa R. GHOSH , Norman C. LO
IPC: F02P9/00
CPC classification number: F02P9/00 , F02D41/0082 , F02D41/0087 , F02D41/1402 , F02D41/3058 , F02D2200/602 , F02P5/1506 , F02P7/02 , Y02T10/46
Abstract: Various methods and arrangements for operating a skip fire engine control system are described. In one aspect of the invention, a distinct firing sequence is determined for each bank of working chambers that is used to operate the bank in a skip fire manner. Each firing sequence uses a different firing fraction. In another aspect of the invention, a determination is made as to whether a firing sequence should be dynamically generated or selected from a set of predefined firing sequences.
Abstract translation: 描述了用于操作跳火消防车控制系统的各种方法和装置。 在本发明的一个方面中，针对用于以跳火方式操作银行的每一组工作室确定了不同的点火顺序。 每个射击序列使用不同的射击分数。 在本发明的另一方面中，确定是否应从一组预定义的触发序列中动态生成或选择点火序列。
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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：US20170321617A1
公开(公告)日：2017-11-09
申请号：US15490092
申请日：2017-04-18
Applicant: Tula Technology, Inc.
Inventor： Srihari KALLURI , Steven E. CARLSON
CPC classification number: F02D41/0087 , F01N3/101 , F01N9/00 , F01N13/082 , F01N13/10 , F01N2410/00 , F01N2410/10 , F01N2900/08 , F02D15/00 , F02D41/0055 , F02D41/123 , F02D41/3058 , F02M26/13 , F02M26/15 , Y02T10/47
Abstract: Various methods and arrangements for improving fuel economy in decel fuel cut-off (DFCO) operation of an internal combustion engine are described. In one aspect, a catalytic converter bypass valve diverts the pumped air in DFCO mode from flowing through a catalytic converter. The diverted, pumped air may flow through a bypass line or be returned to the engine intake manifold through an exhaust gas recirculation return line. Another aspect of the invention relates to directing the diverted pumped air through an emission control device.
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