公开(公告)号：WO2022204643A1

公开(公告)日：2022-09-29

申请号：PCT/US2022/070849

申请日：2022-02-25

Applicant: CUMMINS, INC. ,  TULA TECHNOLOGY, INC.

Inventor： SERRANO, Louis, J. ,  CHEN, Kevin, Shikui ,  CAI, Xiaoping ,  FUERST, John

IPC: F02D13/04 ,  F02D41/02 ,  F02D17/02 ,  F02D13/06 ,  F02D41/30 ,  F02D41/00

Abstract: A variety of methods and arrangements are described for operating an engine in a skip fire manner so that engine requirements, such as exhaust temperature, exhaust flow, torque and NVH, are met.

公开(公告)号：WO2022146500A1

公开(公告)日：2022-07-07

申请号：PCT/US2021/049134

申请日：2021-09-03

Applicant: TULA TECHNOLOGY, INC.

Inventor： SERRANO, Louis Joseph ,  SRINIVASAN, Vijay

IPC: F02D41/00 ,  F02D17/02

Abstract: Methods, systems, and devices for operating an internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders of the internal combustion engine are not designated to be fired, determining a smoothing event time period where a particular one of the cylinders that have not been designated to be fired is either skipped or recharged, selecting a periodic disruptive waveform to approximate that is related to a skip or recharge event that is part of the smoothing event time period, determining a first harmonic sinusoid from a group of harmonic sinusoids that reduces the error between an approximated waveform and the disruptive waveform, determining a timeframe for utilizing the first harmonic, and actuating an additional motor to initiate a supplemental quantity of torque during the smoothing event time period based on the disruption quantity of torque.

公开(公告)号：WO2021262277A1

公开(公告)日：2021-12-30

申请号：PCT/US2021/025369

申请日：2021-04-01

Applicant: TULA TECHNOLOGY INC. ,  CUMMINS INC.

Inventor： PHILLIPS, Andrew W. ,  FUSCHETTO, Jerry F.

IPC: F02D41/00 ,  F02D41/38 ,  F02D17/02 ,  F02D13/06 ,  F02D13/0242 ,  F02D2041/389 ,  F02D41/0087 ,  F02D41/009 ,  F02D41/401 ,  F02D41/402

Abstract: A skip fire engine controller is disclosed that commands an early direct-injection of fuel during a skipped working cycle in which a cylinder is not exhausted. With early direct injection, the fuel has more time to vaporize and mix with air for combustion in an immediately following working cycle in which the cylinder is fired. By increasing the degree of vaporization and mixing, the combustion is both cleaner and more efficient.

公开(公告)号：WO2021225668A1

公开(公告)日：2021-11-11

申请号：PCT/US2021/019936

申请日：2021-02-26

Applicant: TULA TECHNOLOGY, INC. ,  CUMMINS INC.

Inventor： SRINIVASAN, Vijay ,  SERRANO, Louis J. ,  CAI, Xiaoping ,  KOLHOUSE, J. Steven ,  BRAHMA, Avra ,  DALE, Adrian P.

IPC: F02D41/00 ,  F02M26/52 ,  F02D41/14

Abstract: Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NOx) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.

公开(公告)号：WO2021195093A1

公开(公告)日：2021-09-30

申请号：PCT/US2021/023703

申请日：2021-03-23

Applicant: CUMMINS INC. ,  TULA TECHNOLOGY, INC.

Inventor： KOLHOUSE, J. Steven ,  PHILLIPS, Ross, A.

IPC: F02D41/00 ,  F02D17/04 ,  F02D41/30 ,  F02F1/00 ,  F02M57/00

Abstract: A method of controlling a skip-fire cylinder deactivation system of an engine system is provided. The method includes a controller deactivating a cylinder of the engine system to operate the engine system in a skip-fire mode. The method further includes determining a temperature of an injector tip nozzle associated with the cylinder and comparing the temperature of the injector tip nozzle to a threshold a temperature. In response to determining that the temperature of the injector tip nozzle is greater than the threshold temperature, the cylinder is activated by the controller.

公开(公告)号：WO2019125648A1

公开(公告)日：2019-06-27

申请号：PCT/US2018/060683

申请日：2018-11-13

Applicant: TULA TECHNOLOGY, INC.

Inventor： CAO, Yongyan ,  REN, Ying ,  SERRANO, Louis J. ,  BAILEY, Robert Scott ,  SUBRAMANIAN, Ram

IPC: F02D17/02 ,  B60W10/06 ,  B60W20/10 ,  F02D13/02 ,  F02D13/06 ,  F02D41/30

Abstract: The present invention relates generally to improving the fuel efficiency of autonomous vehicles by operating either (1) at a first effective engine displacement that takes into account noise, vibration and harshness (NVH) when the vehicle is occupied or (2) at a second effective engine displacement, without concern for occupant NVH, when the vehicle is not occupied. The second effective engine displacement is typically more fuel efficient than the first effective engine displacement, but result in a higher level of NVH compared to the first effective engine displacement.

公开(公告)号：WO2017222626A1

公开(公告)日：2017-12-28

申请号：PCT/US2017/028118

申请日：2017-04-18

Applicant: TULA TECHNOLOGY INC.

Inventor： SERRANO, Louis J. ,  CARLSON, Steven E.

IPC: F02D29/02 ,  B60W10/02 ,  B60W10/06 ,  F02D17/02 ,  F02D41/00

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 ,  Y02T10/46

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during 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. The described techniques are well suited for use in managing firing fraction transitions during skip fire, dynamic firing level modulation and/or other types of engine operation where the effective displacement of the engine may change.

Abstract translation: 描述了用于在发动机运转期间控制点火分数之间的转换的各种方法和装置。 一般而言，描述致动器第一转换策略，其中致动器位置（例如，凸轮相位，TCC滑差等）在相应的点火分数改变被实施之前改变为或接近目标位置。 当与期望点火分数变化相关联的致动器变化相对较大时，点火分数变化被分成一系列两个或更多点火分数变化步骤。 也描述了一些中间目标选择方案。 所描述的技术非常适合用于管理跳火期间的点火分数转换，动态点火水平调节和/或发动机的有效排量可能改变的其他类型的发动机操作。

公开(公告)号：WO2017192245A1

公开(公告)日：2017-11-09

申请号：PCT/US2017/026937

申请日：2017-04-11

Applicant: TULA TECHNOLOGY INC.

Inventor： KALLURI, Srihari ,  CARLSON, Steven E.

IPC: F01N3/08 ,  F01N3/20

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.

Abstract translation: 描述了用于提高内燃机的减速燃料切断（DFCO）操作中的燃料经济性的各种方法和布置。 在一个方面中，催化转换器旁通阀使DFCO模式中的泵送空气流过催化转化器。 转向的泵送空气可以流过旁路管线或通过废气再循环返回管线返回到发动机进气歧管。 本发明的另一方面涉及引导分流的泵送空气通过排放控制装置。

公开(公告)号：WO2016077246A1

公开(公告)日：2016-05-19

申请号：PCT/US2015/059776

申请日：2015-11-09

Applicant: TULA TECHNOLOGY, INC.

Inventor： YOUNKINS, Matthew A. ,  SERRANO, Louis J.

IPC: F02D17/00 ,  F02D17/02 ,  F02D41/04 ,  F02P9/00

CPC classification number: F02D41/0002 ,  F01L9/02 ,  F01L9/04 ,  F01L13/0005 ,  F01L2800/06 ,  F02D13/0257 ,  F02D13/06 ,  F02D41/0087 ,  F02D2041/001 ,  F02D2250/18 ,  F02M35/1085 ,  F02N11/0814 ,  F02P5/152 ,  F02P9/002 ,  Y02T10/142 ,  Y02T10/18 ,  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.

Abstract translation: 一方面，对内燃机的运转控制方法进行说明。 发动机以跳火方式操作，使得跳过所选择的跳过的工作循环并且激发选择的主动工作循环以输送期望的发动机输出。 对于每个烧制工作室选择特定水平的扭矩输出。 还描述了与上述方法相关的各种方法，布置和系统。

公开(公告)号：WO2015077359A1

公开(公告)日：2015-05-28

申请号：PCT/US2014/066445

申请日：2014-11-19

Applicant: TULA TECHNOLOGY, INC.

Inventor： YOUNKINS, Matthew A. ,  SUBRAMANIAN, Ram ,  BRETON, Leo

IPC: F02D43/00 ,  F02D41/04 ,  F01N3/20 ,  F01N11/00

CPC classification number: F02D41/0087 ,  F02D41/025 ,  F02D41/0255 ,  F02D41/06 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/263 ,  F02D2041/0265 ,  F02D2200/0802 ,  F02D2200/0804 ,  Y02T10/26

Abstract: Various methods and arrangements for controlling catalytic converter temperature are described. In one aspect, an engine controller includes a catalytic monitor and a firing timing determination unit. The catalytic monitor obtains data relating to a temperature of a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner. Another aspect of the invention relates to an engine exhaust system that can help expedite the heating of a catalytic converter.

Abstract translation: 描述用于控制催化转化器温度的各种方法和装置。 一方面，发动机控制器包括催化监控器和点火定时确定单元。 催化监测器获得与催化转化器的温度有关的数据。 至少部分地基于该数据，发射定时确定单元以跳火方式产生用于操作发动机的点火顺序。 本发明的另一方面涉及一种能有助于加速催化转化器的发动机排气系统。