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公开(公告)号：US20210199061A1
公开(公告)日：2021-07-01
申请号：US17183856
申请日：2021-02-24
Applicant: Tula Technology, Inc.
Inventor： Jerry F. FUSCHETTO , Matthew A. YOUNKINS , Ihab S. SOLIMAN , Mark A. WILCUTTS , Steven E. CARLSON , Louis J. SERRANO
Abstract: Various methods and arrangements for improving fuel economy and noise, vibration, and harshness (NVH) in a skip fire controlled engine are described. An engine controller dynamically selects a gas spring type for a skipped firing opportunity. Determination of the skip/fire pattern and gas spring type may be made on a firing opportunity by firing opportunity basis.
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公开(公告)号：US20170370309A1
公开(公告)日：2017-12-28
申请号：US15298542
申请日：2016-10-20
Applicant: Tula Technology, Inc. , GM Global Technology Operations LLC
Inventor： Louis J. SERRANO , Steven E. CARLSON , Steven J. HAASE , Donavan L. DIBBLE , Allen B. RAYL
CPC classification number: F02D41/0087 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , F02D17/02 , F02D37/02 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire and potentially variable displacement operation of an engine. In general, cam first transition strategies are described in which the cam phase is changed to, or close to a target cam phase before a corresponding firing fraction change is implemented. When the cam phase change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps—with each step using a cam first transition approach. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US20170342922A1
公开(公告)日：2017-11-30
申请号：US15679498
申请日：2017-08-17
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：US20150232103A1
公开(公告)日：2015-08-20
申请号：US14704630
申请日：2015-05-05
Applicant: Tula Technology, Inc.
Inventor： Andrew W. PHILLIPS , Steven E. CARLSON
CPC classification number: F02D41/0087 , B60W10/02 , B60W10/026 , B60W10/06 , B60W30/20 , F02D11/105 , F02D13/06 , F02D29/02 , F02D41/022 , F02D41/123 , F02D41/18 , F02D2250/18 , F02P5/1512 , F16H61/143 , F16H2061/145 , Y10T477/73
Abstract: A variety of methods and arrangements for determining conditions when an engine-decoupling friction interface may be locked-up during skip-fire operation of an internal combustion engine are described. In some embodiments, the engine-decoupling friction interface is the lockup clutch of a torque converter situated in a powertrain that transmits motive power from the engine to a wheel. Rotation of the wheel causes vehicle motion.
Abstract translation: 描述了用于在内燃机的跳火操作期间当发动机分离摩擦界面被锁定时确定条件的各种方法和装置。 在一些实施例中，发动机分离摩擦界面是位于动力传动系中的变矩器的锁止离合器，其将动力从发动机传递到车轮。 车轮的旋转会导致车辆运动。
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公开(公告)号：US20200318566A1
公开(公告)日：2020-10-08
申请号：US16839651
申请日：2020-04-03
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Steven E. CARLSON , Louis J. SERRANO , Mark A. WILCUTTS , Vijay SRINIVASAN
Abstract: An internal combustion engine operates so that it delivers zero or negative torque. The engine operates in either a deceleration cylinder cut off (DCCO) mode or skip cylinder compression braking mode. In the skip cylinder compression braking mode, selected working cycles of selected working chambers are operated in a compression release braking mode. Accordingly, individual working chambers are sometimes not fired and sometimes operated in the compression release braking mode while the engine is operating in the skip cylinder compression braking mode.
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Patent Agency Ranking
公开(公告)号：US20180043893A1
公开(公告)日：2018-02-15
申请号：US15792175
申请日：2017-10-24
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Steven E. CARLSON
IPC: B60W30/188 , B60W10/06 , B60W10/02
CPC classification number: B60W30/1882 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , B60W2710/0677 , F02D17/02 , F02D37/02 , F02D41/0002 , F02D41/0087 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504 , F02P9/002 , Y02T10/42
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US20170369063A1
公开(公告)日：2017-12-28
申请号：US15288847
申请日：2016-10-07
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Steven E. CARLSON
CPC classification number: F02D41/0087 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , F02D17/02 , F02D37/02 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire and potentially variable displacement operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before i corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
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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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9.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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