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

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

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.

公开(公告)号：US20170234253A1

公开(公告)日：2017-08-17

申请号：US15584686

申请日：2017-05-02

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Robert C. WANG

IPC: F02D41/12 ,  F02D17/02 ,  F02D41/00

CPC classification number: F02D41/12 ,  F01N11/007 ,  F02D17/02 ,  F02D17/04 ,  F02D29/02 ,  F02D41/003 ,  F02D41/0087 ,  F02D41/126 ,  F02D2009/024 ,  F02D2041/0012 ,  F02D2200/0406 ,  F02D2250/08 ,  F02D2250/41 ,  F02M25/089 ,  F02M35/10222 ,  F02M35/10229

Abstract: Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. In another aspect, transitions from DCCO, involve the use of an air pumping skip fire operational mode. After the manifold pressure has been reduced, the engine may transition to either a cylinder deactivation skip fire operational mode or other appropriate operational mode. In yet another aspect a method of transitioning into DCCO using a skip fire approach is described. In this aspect, the fraction of the working cycles that are fired is gradually reduced to a threshold firing fraction. All of the working chambers are then deactivated after reaching the threshold firing fraction.

公开(公告)号：US20170009729A1

公开(公告)日：2017-01-12

申请号：US15274029

申请日：2016-09-23

Applicant: Tula Technology, Inc.

Inventor： Matthew A. YOUNKINS ,  Louis J. SERRANO

IPC: F02P5/15 ,  F02D41/26 ,  F01L1/047

CPC classification number: F02D41/0087 ,  F01L1/047 ,  F02D11/02 ,  F02D13/0223 ,  F02D13/0273 ,  F02D13/06 ,  F02D17/02 ,  F02D41/0002 ,  F02D41/008 ,  F02D41/04 ,  F02D41/107 ,  F02D41/123 ,  F02D41/26 ,  F02D2041/001 ,  F02D2041/0012 ,  F02D2250/18 ,  F02P5/145 ,  F02P5/1502 ,  Y02T10/142 ,  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：US20160326969A1

公开(公告)日：2016-11-10

申请号：US14704747

申请日：2015-05-05

Applicant: Tula Technology Inc.

Inventor： Louis J. SERRANO ,  Mohammad R. PIRJABERI ,  Charles H. LOUCKS

IPC: F02D17/02 ,  G01M15/04 ,  F02D41/18

CPC classification number: F02D17/02 ,  F02D41/0087 ,  F02D41/0097 ,  F02D41/18 ,  F02D2041/0012 ,  F02D2041/1422 ,  F02D2041/1432 ,  F02D2041/286

Abstract: A variety of methods, devices and filters are described that are suitable for averaging measured power train operating parameters over a period that varies as a function of an engine cylinder firing characteristic such as a current operational firing fraction or firing sequence. The averaged measured operating parameter may be used in a variety of different engine control related functions, calculations and/or operations. The described techniques and devices are particularly well suited for use during skip fire operation of an engine.

Abstract translation: 描述了各种各样的方法，装置和过滤器，其适用于在作为发动机气缸点火特性（例如当前的操作点火分数或点火顺序）的函数变化的周期内平均测量的动力系运行参数。 平均测量的操作参数可用于各种不同的发动机控制相关功能，计算和/或操作。 所描述的技术和装置特别适用于在发动机的跳火操作期间使用。

公开(公告)号：US20160201586A1

公开(公告)日：2016-07-14

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

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：US20150100221A1

公开(公告)日：2015-04-09

申请号：US14509792

申请日：2014-10-08

Applicant: Tula Technology Inc.

Inventor： Geoffrey ROUTLEDGE ,  Mark A. SHOST ,  Biswa R. GHOSH ,  Louis J. SERRANO ,  Mark WILCUTTS

IPC: F01N1/06 ,  F02D17/02

CPC classification number: F01N1/065 ,  B60K5/12 ,  F01N1/165 ,  F02D17/02

Abstract: In one aspect, a system for reducing noise or vibration generated by an internal combustion engine is described. An engine controller is arranged to generate firing information suitable for operating the working chambers of the engine in a skip fire manner to deliver a desired amount of torque. A noise/vibration reduction unit is arranged to help reduce noise or vibration based on the firing information. The noise/vibration controller actively controls a device that is not a part of the engine to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a skip fire characteristic.

Abstract translation: 在一个方面，描述了一种用于降低由内燃机产生的噪音或振动的系统。 发动机控制器布置成产生适于以跳火方式操作发动机的工作室的发射信息，以输送期望的扭矩量。 噪声/减振单元被布置成基于发射信息来帮助减少噪声或振动。 噪声/振动控制器主动地控制不是发动机的一部分的装置，至少部分地基于跳火特性，以期望的方式改变车辆的NVH特性。

公开(公告)号：US20130066502A1

公开(公告)日：2013-03-14

申请号：US13672466

申请日：2012-11-08

Applicant: Tula Technology Inc.

Inventor： Ronald D. YUILLE ,  Mark A. SHOST ,  Louis J. SERRANO ,  Adya S. TRIPATHI

IPC: B60W20/00 ,  B60W10/08 ,  B60W10/06

CPC classification number: B60W20/00 ,  B60K6/48 ,  B60W10/06 ,  B60W10/08 ,  B60W20/16 ,  B60W2510/244 ,  B60W2710/0666 ,  F02D17/02 ,  F02D37/02 ,  F02D41/0002 ,  F02D41/0087 ,  F02D41/1401 ,  F02D41/1402 ,  F02D41/266 ,  F02D2041/2027 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/42 ,  Y02T10/46 ,  Y02T10/6221

Abstract: A variety of methods and arrangements for operating an internal combustion engine and one or more motor/generators in a hybrid vehicle are described. In various embodiments, the engine is operated in a skip fire mode. Depending on the state of charge of an energy storage device and/or other factors, the engine is operated to generate more or less than a desired level of torque. The one or more motor/generators are used to add or subtract torque so that the motor/generator(s) and the engine collectively deliver the desired level of torque. In some embodiments, the engine may be run with a substantially open throttle to reduce pumping losses and improve fuel efficiency.

Abstract translation: 描述了用于操作混合动力车辆中的内燃机和一个或多个电动机/发电机的各种方法和装置。 在各种实施例中，发动机以跳火模式操作。 根据能量存储装置的充电状态和/或其他因素，发动机被操作以产生大于或小于期望的扭矩水平。 一个或多个电动机/发电机用于增加或减少转矩，使得电动机/发电机和发动机共同提供所需的扭矩水平。 在一些实施例中，发动机可以以基本上打开的节气门运行，以减少泵送损失并提高燃料效率。

公开(公告)号：US20220412277A1

公开(公告)日：2022-12-29

申请号：US17899038

申请日：2022-08-30

Applicant: Tula Technology, Inc. ,  Cummins Inc.

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

IPC: F02D41/00 ,  F02M26/05

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：US20210404397A1

公开(公告)日：2021-12-30

申请号：US17332763

申请日：2021-05-27

Applicant: Tula Technology, Inc.

Inventor： Yongyan CAO ,  Elliott A. ORTIZ-SOTO ,  Louis J. SERRANO

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

Abstract: A variety of engine controllers and methods are described for controlling engines operating in a cylinder output level modulation mode. In one aspect transitions between different effective firing fractions are managed by gradually ramping an effective firing density. In another, when an engine transitions to a multi-level skip fire firing density that has more than one possible high/low/skip sequence, the phase of the high/low pattern is set relative to the phase of the firing pattern to ensure that a preferred high/low/skip sequence is generated. In another aspect, rapid large torque changes can be implemented in part by immediately changing the operational high/low fraction in response to a command to increase or reduce the desired engine torque.

公开(公告)号：US20210001832A1

公开(公告)日：2021-01-07

申请号：US17029560

申请日：2020-09-23

Applicant: Tula Technology, Inc.

Inventor： Andrew W. PHILLIPS ,  Louis J. SERRANO ,  Xiaoping CAI

IPC: B60W10/06 ,  F02D17/02 ,  F02D13/06

Abstract: Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation.