公开(公告)号：US09777658B2

公开(公告)日：2017-10-03

申请号：US15147690

申请日：2016-05-05

Applicant: Tula Technology, Inc.

Inventor： Masaki Nagashima ,  Mohammad R. Pirjaberi ,  Louis J. Serrano

IPC: F02D41/04 ,  F02D41/14 ,  F02D41/18

CPC classification number: F02D41/1401 ,  F02D41/0002 ,  F02D41/0087 ,  F02D41/04 ,  F02D41/18 ,  F02D2041/001 ,  F02D2041/141 ,  F02D2200/0406 ,  F02D2200/1004 ,  F02D2250/21 ,  Y02T10/42

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.

公开(公告)号：US09650971B2

公开(公告)日：2017-05-16

申请号：US13963686

申请日：2013-08-09

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. Pirjaberi ,  Steven E. Carlson ,  Louis J. Serrano ,  Xin Yuan ,  Li-Chun Chien ,  Adya S. Tripathi

IPC: F02D17/02 ,  F02D41/00 ,  F02D41/02 ,  F02D11/10 ,  F02D41/24

CPC classification number: F02D41/00 ,  F02D11/105 ,  F02D17/02 ,  F02D41/0087 ,  F02D41/0225 ,  F02D41/2422 ,  F02D2250/18

Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.

公开(公告)号：US09650923B2

公开(公告)日：2017-05-16

申请号：US14858046

申请日：2015-09-18

Applicant: Tula Technology Inc.

Inventor： John W. Parsels ,  Matthew A. Younkins ,  Shikui Kevin Chen

IPC: F02D13/06 ,  F01L13/00 ,  F01L1/18 ,  F01L9/02 ,  F01L9/04 ,  F02D41/00 ,  F02D41/14 ,  F02D41/22

CPC classification number: F01L13/0005 ,  F01L1/18 ,  F01L9/02 ,  F01L9/04 ,  F01L2013/001 ,  F01L2820/01 ,  F01L2820/033 ,  F01L2820/045 ,  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.

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

IPC: G01M15/04 ,  F02D41/00 ,  F02P17/12

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。

公开(公告)号：US20160377007A9

公开(公告)日：2016-12-29

申请号：US13843567

申请日：2013-03-15

Applicant: TULA TECHNOLOGY, INC.

Inventor： Mark A. WILCUTTS ,  Xin YUAN ,  Joshua P. SWITKES ,  Li-Chun CHIEN ,  Steven E. CARLSON ,  Christopher W. CHANDLER ,  Christopher C. Hand ,  Matthew A. YOUNKINS ,  Adya S. Tripathi

IPC: F02D41/00

CPC classification number: F02D41/0087 ,  F02D41/3058 ,  F02D2200/0614

Abstract: Various methods and arrangements for determining a combustion control parameter for a working chamber in an engine are described. In one aspect, an engine controller includes a firing counter that stores a firing history for the working chamber. A combustion control module is used to determine a combustion control parameter, which is used to help manage combustion in the working chamber. The combustion control parameter is determined based at least in part on the firing history.

Abstract translation: 描述了用于确定发动机中的工作室的燃烧控制参数的各种方法和装置。 一方面，发动机控制器包括存储工作室的击发历史的发射计数器。 燃烧控制模块用于确定燃烧控制参数，其用于帮助管理工作室中的燃烧。 至少部分地基于击发历史来确定燃烧控制参数。

公开(公告)号：US20160363062A9

公开(公告)日：2016-12-15

申请号：US13963686

申请日：2013-08-09

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. PIRJABERI ,  Steven E. CARLSON ,  Louis J. SERRANO ,  Xin YUAN ,  Li-Chun CHIEN ,  Adya S. TRIPATHI

IPC: F02D41/00

CPC classification number: F02D41/00 ,  F02D11/105 ,  F02D17/02 ,  F02D41/0087 ,  F02D41/0225 ,  F02D41/2422 ,  F02D2250/18

Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.

Abstract translation: 所描述的实施例总体上涉及跳过内燃机的火灾控制，特别涉及用于确定期望的操作燃烧部分的机构。 在一些实施例中，排放分数确定单元布置成确定适于递送所要求的发动机输出的点火分数。 射击分数确定单元可以在确定期望的击发分数时利用诸如查找表的数据结构。 在一个方面，将期望的发动机输出和一个或多个操作动力系参数（例如当前发动机转速）用作用于选择期望的发动部分的查找表的索引。 在其他实施例中，数据结构的附加索引可以包括以下任何一个：传动齿轮; 歧管绝对压力（MAP）; 歧管空气温度; 指示质量空气充注（MAC）的参数; 凸轮位置 气缸扭矩输出; 最大允许歧管压力; 车速; 和大气压力。

公开(公告)号：US09512794B2

公开(公告)日：2016-12-06

申请号：US14992779

申请日：2016-01-11

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano ,  Xin Yuan ,  John W. Parsels ,  Mohammad R. Pirjaberi ,  Mark A. Wilcutts ,  Masaki Nagashima

IPC: F02D41/00 ,  F02D41/14 ,  F02D41/30

CPC classification number: F02D41/0087 ,  F02D41/0002 ,  F02D41/1498 ,  F02D41/3058 ,  F02D41/307 ,  F02D2041/0012

Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.

Abstract translation: 描述了用于减少跳火消防车控制系统中的噪声，振动和粗糙度（NVH）的各种方法和装置。 在一个方面，使用点火顺序来以跳火方式操作发动机。 确定通过能量存储/释放装置施加到动力系的平滑扭矩。 平滑扭矩被布置成至少部分抵消由跳过火焰点火序列产生的扭矩的变化。 还描述了与上述操作相关的各种方法，动力系统控制器，布置和计算机软件。

公开(公告)号：US09482202B2

公开(公告)日：2016-11-01

申请号：US14568408

申请日：2014-12-12

Applicant: Tula Technology Inc.

Inventor： Steven E. Carlson

IPC: F02D41/02 ,  F02P5/152 ,  F02D17/02 ,  F02D41/00

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。

公开(公告)号：US20160252023A1

公开(公告)日：2016-09-01

申请号：US15148843

申请日：2016-05-06

Applicant: Tula Technology, Inc.

Inventor： Vijay SRINIVASAN ,  Louis J. SERRANO ,  Siamak HASHEMI ,  Robert S. BAILEY ,  Geoffrey ROUTLEDGE

IPC: F02D17/02 ,  F02D41/00

CPC classification number: F02D17/02 ,  F02D41/0087 ,  F02D41/021 ,  F02D41/0225 ,  F02D41/1406 ,  F02D41/2422 ,  F02D2200/025 ,  F02D2200/101 ,  F02D2200/702

Abstract: In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.

Abstract translation: 在一个方面，描述了一个跳过消防车控制器。 跳过消防车控制器包括跳过火模块，其被布置成确定用于输送所需发动机输出的操作点火分数和相关联的气缸负载。 跳过消防车控制器还包括点火控制器，其布置成以能够提供所选择的操作射击分数的跳火方式来引导点火。 还描述了与选择合适的操作射击分数有关的各种方法，模块，查找表和布置。

公开(公告)号：US09422880B2

公开(公告)日：2016-08-23

申请号：US14704630

申请日：2015-05-05

Applicant: Tula Technology, Inc.

Inventor： Andrew W. Phillips ,  Steven E. Carlson

IPC: F02D41/00 ,  F02D13/06 ,  B60W30/20 ,  F02D29/02 ,  F02P5/15 ,  F16H61/14 ,  B60W10/02 ,  B60W10/06 ,  F02D41/12 ,  F02D41/02 ,  F02D41/18 ,  F02D11/10

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。