公开(公告)号：US08402942B2

公开(公告)日：2013-03-26

申请号：US12501392

申请日：2009-07-10

Applicant: Adya S. Tripathi ,  Chester J. Silvestri

Inventor： Adya S. Tripathi ,  Chester J. Silvestri

IPC: F02D43/00 ,  F02D17/00 ,  F02D45/00 ,  G06F19/00

CPC classification number: F02D41/1401 ,  F02D37/02 ,  F02D41/0087 ,  F02D41/266 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/46

Abstract: The present invention relates to system and methods for improving efficiency of an internal combustion engine. This system may include a fuel processor. The system receives instructions for a desired engine output and operating conditions. The system may then determine an operational state corresponding to the desired output. The operational state includes designating the cylinders into one of three categories: working, deactivated and passive. The number of working cylinders is calculated by dividing the desired output by the power provided by one cylinder operating at substantially optimal efficiency. Then the system substantially disables fuel flow to and air flow to the deactivated cylinders, substantially disables fuel flow to and firing of the passive cylinders, and substantially regulates fuel flow to, air flow to and firing of the working cylinders. Firing of the working cylinders is synchronized with engine speed to reduce unwanted engine vibrations. The number of working, passive and deactivated cylinders may be continually altered in response to changes in desired output or operating conditions.

Abstract translation: 本发明涉及提高内燃机效率的系统和方法。 该系统可以包括燃料处理器。 系统接收到所需发动机输出和操作条件的指令。 系统然后可以确定对应于期望输出的操作状态。 操作状态包括将气瓶指定为三种类型之一：工作，停用和被动。 通过将期望的输出除以由基本上最佳效率操作的一个气缸提供的功率来计算工作气缸的数量。 然后，该系统基本上禁止燃料流动并且空气流向失活的气缸，基本上禁止燃料流向无源气缸的燃烧和点燃，并且基本上调节燃料流向工作气缸的空气流动和燃烧。 工作气缸的点火与发动机转速同步，以减少不必要的发动机振动。 工作，被动和停用的气缸的数量可以响应于期望输出或操作条件的变化而不断地改变。

公开(公告)号：US08131447B2

公开(公告)日：2012-03-06

申请号：US12355725

申请日：2009-01-16

Applicant: Adya S. Tripathi ,  Chester J. Silvestri

Inventor： Adya S. Tripathi ,  Chester J. Silvestri

IPC: F02D41/30 ,  F02D17/02 ,  F02M51/00

CPC classification number: F02D41/266 ,  F02D41/0087 ,  F02D41/047 ,  F02D41/068 ,  F02D41/123 ,  F02D41/1402 ,  F02D41/1454 ,  F02D41/1482 ,  F02D41/3058 ,  F02D41/365 ,  F02D2041/141 ,  F02D2250/18 ,  F02D2400/11 ,  F02P9/002 ,  Y02T10/142

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, selected combustion events are skipped during operation of the internal combustion engine so that other working cycles can operate at a better thermodynamic efficiency. In one aspect of the invention, an engine is controlled to operate in a variable displacement mode. In the variable displacement mode, fuel is not delivered to the working chambers (e.g. cylinders) during selected “skipped” working cycles. During active (“non-skipped”) working cycles, a maximum (e.g., unthrottled) amount of air and an optimized amount of fuel is delivered to the relevant working chambers so that the fired working chambers can operate at efficiencies closer to their optimal efficiency. A controller is used to dynamically determine the chamber firings required to provide the engine torque based on the engine's current operational state and conditions. The chamber firings may be sequenced in real time or in near real time in a manner that helps reduce undesirable vibrations of the engine.

Abstract translation: 描述了用于改善内燃机的燃料效率的各种方法和装置。 通常，在内燃机操作期间跳过选定的燃烧事件，使得其他工作循环可以以更好的热力学效率工作。 在本发明的一个方面，发动机被控制为以可变排量模式操作。 在可变排量模式中，在选择的“跳过”工作循环期间，燃料不被输送到工作室（例如气缸）。 在主动（“非跳过”）工作循环期间，最大限度地（例如，无节流）的空气量和优化的燃料量被输送到相关的工作室，使得燃烧的工作室可以以更接近其最佳效率的效率 。 控制器用于动态地确定基于发动机的当前操作状态和条件来提供发动机扭矩所需的腔室点火。 室内燃烧可以以有助于减少发动机的不期望的振动的方式实时或接近实时地排序。

公开(公告)号：US20110251773A1

公开(公告)日：2011-10-13

申请号：US13004839

申请日：2011-01-11

Applicant: Farzad SAHANDIESFANJANI ,  Chris HAND ,  Mohammad PIRJABERI ,  Adya S. TRIPATHI

Inventor： Farzad SAHANDIESFANJANI ,  Chris HAND ,  Mohammad PIRJABERI ,  Adya S. TRIPATHI

IPC: F02D28/00

CPC classification number: F02D17/02 ,  F02D37/02 ,  F02D41/0087 ,  F02D41/1401 ,  F02D41/1402 ,  F02D41/266 ,  F02D2041/2027 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/142 ,  Y02T10/46

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. In some aspects, methods and arrangements are described for operating an engine in a throttled skip fire mode. In other aspects, methods and arrangements are described for controlling the operational state of a variable displacement engine.

Abstract translation: 描述了用于改善内燃机的燃料效率的各种方法和装置。 在一些方面，描述了用于在节流跳火模式下操作发动机的方法和布置。 在其他方面，描述了用于控制可变排量发动机的操作状态的方法和装置。

公开(公告)号：US07886715B2

公开(公告)日：2011-02-15

申请号：US12615179

申请日：2009-11-09

Applicant: Adya S. Tripathi ,  Chester J. Silvestri

Inventor： Adya S. Tripathi ,  Chester J. Silvestri

IPC: F02P5/00 ,  F02M7/00 ,  F02D43/00

CPC classification number: F02D41/0087 ,  F02D37/02 ,  F02D41/1401 ,  F02D41/266 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/46

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. Feedback control is used to dynamically determine the working cycles to be skipped to provide a desired engine output. In some embodiments a substantially optimized amount of air and fuel is delivered to the working chambers during active working cycles so that the fired working chambers can operate at efficiencies close to their optimal efficiency. In some embodiments, the appropriate firing pattern is determined at least in part using predictive adaptive control. By way of example, sigma delta controllers work well for this purpose. In some implementations, the feedback includes feedback indicative of at least one of actual and requested working cycle firings. In some embodiments, the appropriate firings are determined on a firing opportunity by firing opportunity basis. Additionally, in some embodiments, an indicia of the current rotational speed of the engine is used as a clock input for a controller used to selectively cause the skipped working cycles to be skipped.

Abstract translation: 描述了用于改善内燃机的燃料效率的各种方法和装置。 通常，发动机被控制为以跳火可变排量模式操作。 反馈控制用于动态地确定要跳过的工作循环以提供期望的发动机输出。 在一些实施例中，在主动工作循环期间将基本上优化的空气和燃料量输送到工作室，使得燃烧的工作室可以以接近其最佳效率的效率进行操作。 在一些实施例中，至少部分地使用预测自适应控制来确定适当的点火模式。 作为例子，西格玛三角洲控制器为此工作良好。 在一些实施方案中，反馈包括指示实际和所请求的工作循环点火中的至少一个的反馈。 在一些实施例中，通过击发机会的基础，通过击发机会确定适当的发射。 另外，在一些实施例中，将引擎的当前转速的标记用作用于选择性地使跳过的工作循环被跳过的控制器的时钟输入。

公开(公告)号：US20100050985A1

公开(公告)日：2010-03-04

申请号：US12615171

申请日：2009-11-09

Applicant: Adya S. TRIPATHI ,  Chester J. SILVESTRI

Inventor： Adya S. TRIPATHI ,  Chester J. SILVESTRI

IPC: F02P5/00 ,  F02M7/00

CPC classification number: F02D41/0087 ,  F02D37/02 ,  F02D41/1401 ,  F02D41/266 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/46

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, an engine is controlled to operate in a skip fire variable displacement mode. Feedback control is used to dynamically determine the working cycles to be skipped to provide a desired engine output. In some embodiments a substantially optimized amount of air and fuel is delivered to the working chambers during active working cycles so that the fired working chambers can operate at efficiencies close to their optimal efficiency. In some embodiments, the appropriate firing pattern is determined at least in part using predictive adaptive control. By way of example, sigma delta controllers work well for this purpose. In some implementations, the feedback includes feedback indicative of at least one of actual and requested working cycle firings. In some embodiments, the appropriate firings are determined on a firing opportunity by firing opportunity basis. Additionally, in some embodiments, an indicia of the current rotational speed of the engine is used as a clock input for a controller used to selectively cause the skipped working cycles to be skipped.

公开(公告)号：US20100010724A1

公开(公告)日：2010-01-14

申请号：US12355725

申请日：2009-01-16

Applicant: Adya S. TRIPATHI ,  Chester J. SILVESTRI

Inventor： Adya S. TRIPATHI ,  Chester J. SILVESTRI

IPC: F02D41/30

CPC classification number: F02D41/266 ,  F02D41/0087 ,  F02D41/047 ,  F02D41/068 ,  F02D41/123 ,  F02D41/1402 ,  F02D41/1454 ,  F02D41/1482 ,  F02D41/3058 ,  F02D41/365 ,  F02D2041/141 ,  F02D2250/18 ,  F02D2400/11 ,  F02P9/002 ,  Y02T10/142

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines are described. Generally, selected combustion events are skipped during operation of the internal combustion engine so that other working cycles can operate at a better thermodynamic efficiency. In one aspect of the invention, an engine is controlled to operate in a variable displacement mode. In the variable displacement mode, fuel is not delivered to the working chambers (e.g. cylinders) during selected “skipped” working cycles. During active (“non-skipped”) working cycles, a maximum (e.g., unthrottled) amount of air and an optimized amount of fuel is delivered to the relevant working chambers so that the fired working chambers can operate at efficiencies closer to their optimal efficiency. A controller is used to dynamically determine the chamber firings required to provide the engine torque based on the engine's current operational state and conditions. The chamber firings may be sequenced in real time or in near real time in a manner that helps reduce undesirable vibrations of the engine.

Abstract translation: 描述了用于改善内燃机的燃料效率的各种方法和装置。 通常，在内燃机操作期间跳过选定的燃烧事件，使得其他工作循环可以以更好的热力学效率工作。 在本发明的一个方面，发动机被控制为以可变排量模式操作。 在可变排量模式中，在选择的“跳过”工作循环期间，燃料不被输送到工作室（例如气缸）。 在主动（“非跳过”）工作循环期间，最大限度地（例如，无节流）的空气量和优化的燃料量被输送到相关的工作室，使得燃烧的工作室可以以更接近其最佳效率的效率 。 控制器用于动态地确定基于发动机的当前操作状态和条件来提供发动机扭矩所需的腔室点火。 室内燃烧可以以有助于减少发动机的不期望的振动的方式实时或接近实时地排序。

公开(公告)号：US11713728B2

公开(公告)日：2023-08-01

申请号：US17406547

申请日：2021-08-19

Applicant: Tula Technology, Inc. ,  Cummins, Inc.

Inventor： Benjamin Wolk ,  Justin Lee ,  Timothy Hayden Shipp

IPC: F02D41/00 ,  F02D41/30 ,  F02D41/40

CPC classification number: F02D41/008 ,  F02D41/009 ,  F02D41/3011 ,  F02D41/403 ,  F02D2200/021 ,  F02D2200/0614

Abstract: A variety of methods and arrangements are described for determining a pilot injection mass during skip fire operation of an internal combustion engine.

公开(公告)号：US11685380B1

公开(公告)日：2023-06-27

申请号：US17576160

申请日：2022-01-14

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano ,  Xiaoping Cai ,  Andrew W. Phillips

IPC: B60W30/19 ,  F02D41/02 ,  F02D41/00 ,  B60W10/06 ,  B60W10/11

CPC classification number: B60W30/19 ,  B60W10/06 ,  B60W10/11 ,  F02D41/0087 ,  F02D41/0225 ,  F02D2200/101 ,  F02D2200/501

Abstract: Methods and controllers for controlling engine speed to reduce NVH that occurs in conjunction with transmission shifts are described. In some embodiments, when a transmission shift to a target gear is expected, a target engine speed appropriate for the target gear is first determined. A target rate of change of the engine speed is calculated from the initial engine speed and target engine speed in conjunction with a target transition time. A target torque is then calculated from the target rate of change of engine speed. A target firing fraction or induction ratio are determined that are desired for use with the target engine speed based on the target torque. The transition to the target engine speed and target firing fraction or induction ratio are completed before the gear shift is completed. The described approaches are well suited for use during skip fire or other cylinder output level modulation operation of the engine.

公开(公告)号：US11624331B2

公开(公告)日：2023-04-11

申请号：US17693016

申请日：2022-03-11

Applicant: Tula Technology, Inc.

Inventor： Matthew A. Younkins ,  Xi Luo

IPC: F02D41/06 ,  F02D17/02 ,  F02P5/14 ,  F02D41/00 ,  F02D41/40 ,  F01N3/10 ,  F01L1/34 ,  F02D41/30 ,  F01N3/035 ,  F01N3/20 ,  F01M1/16 ,  F01L9/16 ,  F01M1/02 ,  F01M5/00

Abstract: A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system temperatures are described. The system and method may be used to rapidly heat up the aftertreatment system(s) and/or an engine block of the engine following a cold start by using one or more different types of pneumatic cylinder springs during skipped firing opportunities. By rapidly heating the aftertreatment system(s) and/or engine block, noxious emissions such as hydrocarbons, carbon monoxide, NOx and/or particulates, following cold starts are significantly reduced.

公开(公告)号：US11560135B2

公开(公告)日：2023-01-24

申请号：US17531437

申请日：2021-11-19

Applicant: Tula Technology, Inc.

Inventor： Vijay Srinivasan ,  Louis Joseph Serrano

IPC: B60T1/00 ,  B60W20/13 ,  B60W20/15 ,  F02P9/00 ,  F02D13/02 ,  F02D13/04 ,  B60W10/06 ,  F02D41/00 ,  F02D41/14 ,  B60W10/08

Abstract: Methods, systems, and devices for managing motor torque smoothing for internal combustion engine cylinder recharging events are described herein. An engine controller in a vehicle for managing motor torque smoothing for internal combustion engine cylinder recharging events may be configured to operate the internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders are not designated to be fired, determine a recharge event time period where a particular one of the cylinders that have not been designated to be fired is recharged, identify a disruption quantity of torque during the recharging event time period, and actuate an additional motor to initiate a supplemental quantity of torque during the recharge event time period based on the disruption quantity of torque.