公开(公告)号：US20140277999A1

公开(公告)日：2014-09-18

申请号：US13842234

申请日：2013-03-15

Applicant: TULA TECHNOLOGY, INC.

Inventor： Joshua P. SWITKES ,  Xin YUAN ,  Matthew A. YOUNKINS

IPC: F02D13/02

CPC classification number: F02D13/0219 ,  F01L1/344 ,  F01L1/34409 ,  F01L2013/001 ,  F01L2800/00 ,  F01L2800/15 ,  F01L2820/01 ,  F02D13/06 ,  F02D41/0087 ,  F02D2041/001 ,  F02D2041/0012 ,  Y02T10/18

Abstract: Arrangements for stabilizing valve timing adjustment mechanisms such as cam phasers during operation of an engine are described. The described approaches are particularly well suited for use during skip fire control, although they may be used advantageously in other applications as well. In general, the phase of an adjustable phase camshaft is controlled relative to a crankshaft of an engine. In one aspect, at least one of (i) firing events in a skip fire firing sequence, and (ii) dynamically determined valve actuation events are used in the control of the camshaft phase during operation of the engine. In some embodiments, hydraulic pressure within a cam phaser is varied in a manner that maintains the phase of the camshaft substantially more stable through transitory variations in torque applied to the camshaft by the actuation of the valves than would occur without the variations in hydraulic pressure.

Abstract translation: 描述了在发动机运行期间稳定气门正时调节机构（例如凸轮相位器）的布置。 所描述的方法特别适用于跳过火控制期间的使用，尽管它们也可有利地用于其它应用中。 通常，相对于发动机的曲轴控制可调节相位凸轮轴的相位。 在一个方面中，在发动机运转期间，在（i）点火点火顺序中的点火事件和（ii）动态确定的气门致动事件中的至少一个被用于控制凸轮轴相位。 在一些实施例中，凸轮相位器内的液压变化的方式是通过阀的致动而不会在没有液压变化的情况下施加到凸轮轴上的扭矩的瞬时变化来保持凸轮轴的相位的稳定。

公开(公告)号：US20140045652A1

公开(公告)日：2014-02-13

申请号：US13963744

申请日：2013-08-09

Applicant: Tula Technology, Inc.

Inventor： Steven E. CARLSON ,  Xin YUAN ,  Joshua P. SWITKES ,  Li-Chun CHIEN

IPC: B60W10/06 ,  B60W10/11

CPC classification number: B60W10/06 ,  B60W10/11 ,  B60W30/19 ,  F02D41/0087 ,  F02D41/023 ,  F02D41/1497 ,  F02D2250/18 ,  F02D2250/21 ,  F02P5/1504 ,  F02P5/1512 ,  F02P9/005 ,  F16H63/502 ,  Y02T10/46 ,  Y10T477/677

Abstract: Methods and devices are described that utilize skip fire techniques to rapidly meet requests for transitory changes in the output of an engine. Specifically, the fraction or percentage of the working cycles that are fired can be changed during a transitory event so that the engine delivers the desired transitory engine output. Once the transitory event is over, normal engine operation may be restored. The described techniques are useful in a variety of applications that require a relatively quick, but transitory, reduction in engine output to meet vehicle control requirements. One particularly useful application is during transmission shift events. Other representative applications include: loss of traction events, stability control events, wheel hop prevention events, etc.

Abstract translation: 描述了利用跳火技术快速满足对发动机的输出的暂时变化的请求的方法和装置。 具体地说，在瞬态事件期间可以改变被激发的工作循环的分数或百分比，以便发动机输出期望的暂时发动机输出。 一旦暂时事件结束，可以恢复正常的发动机运转。 所描述的技术在各种应用中是有用的，其需要相对快速但短暂的发动机输出的降低以满足车辆控制要求。 一个特别有用的应用是传输移位事件。 其他代表性应用包括：牵引事件的损失，稳定性控制事件，防止跳闸事件等。

公开(公告)号：US20140034010A1

公开(公告)日：2014-02-06

申请号：US13953615

申请日：2013-07-29

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Steven E. CARLSON ,  Joshua P. SWITKES ,  Ronald D. YUILLE

IPC: F02D17/02

CPC classification number: F02D17/02 ,  F02D13/0203 ,  F02D13/04 ,  F02D41/0005 ,  F02D41/0087 ,  F02D41/123

Abstract: In one aspect of the invention, an engine is operated in a skip cylinder engine braking mode. In the skip cylinder engine braking mode, selected working cycles of selected working chambers are deactivated. Other selected working cycles of the selected working chambers are operated in a braking mode. Accordingly, individual working chambers are sometimes deactivated and sometimes operated in the braking mode while the engine is operating in the skip cylinder engine braking mode. Various methods for cylinder control are described, which improve fuel economy, catalytic converter performance, and vehicle NVH characteristics.

Abstract translation: 在本发明的一个方面，发动机以跳过气缸发动机制动模式操作。 在跳过气缸发动机制动模式下，所选择的工作室的选定工作循环被停用。 所选择的工作室的其他选定的工作循环在制动模式下操作。 因此，当发动机以跳过气缸发动机制动模式运行时，单个工作室有时被停用并且有时在制动模式下操作。 描述了用于气缸控制的各种方法，其提高燃料经济性，催化转化器性能和车辆NVH特性。

公开(公告)号：US20130298870A1

公开(公告)日：2013-11-14

申请号：US13945289

申请日：2013-07-18

Applicant: Tula Technology, Inc.

Inventor： Adya S. TRIPATHI ,  Chester J. SILVESTRI ,  Christopher W. CHANDLER ,  Christopher C. HAND ,  Joshua P. SWITKES ,  Mark A. WILCUTTS

IPC: F02D17/02

CPC classification number: F02D17/02 ,  F02D41/0087 ,  F02D41/047

Abstract: A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. In one aspect, the spark timing associated with each fired working cycle is based at least in part on the firing history of the fired working chamber.

Abstract translation: 描述了用于在跳火可变位移模式中控制内燃机的操作的各种方法和装置。 通常，发动机被控制为以跳火可变排量模式操作。 在一个方面，与每个燃烧的工作循环相关联的火花正时至少部分地基于燃烧的工作室的击发历史。

公开(公告)号：US20130291816A1

公开(公告)日：2013-11-07

申请号：US13886107

申请日：2013-05-02

Applicant: TULA TECHNOLOGY, INC.

Inventor： Louis J. SERRANO ,  Joshua P. SWITKES

IPC: F01L1/344

CPC classification number: F01L1/344 ,  F02D13/0215 ,  Y02T10/18

Abstract: A method for improving the operation of an internal combustion engine implementing cylinder deactivation is described. Generally, the pattern of combustion events that are fired and skipped together with the geometry of the exhaust and/or intake system can create unpleasant acoustic issues. By slightly altering the timing of the cylinder intake and exhaust valves, these acoustic issues can be mitigated. The valve timing can be altered on a combustion event by combustion event basis. Alternatively, valve timing for different groups of cylinders can be modified together.

Abstract translation: 描述了一种改进执行气缸停用的内燃机的操作的方法。 通常，与排气和/或进气系统的几何形状一起燃烧和跳过的燃烧事件的模式可能产生不愉快的声学问题。 通过稍微改变气缸进气和排气门的时间，可以减轻这些声学问题。 燃烧事件可根据燃烧事件改变气门正时。 或者，可以一起修改不同组的气缸的气门正时。