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公开(公告)号：US09689328B2
公开(公告)日：2017-06-27
申请号：US15274029
申请日：2016-09-23
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Louis J. Serrano
IPC: F02D41/00 , F02D41/04 , F02D13/06 , F02D13/02 , F02D17/02 , F02D41/10 , F02D41/12 , F02P5/145 , F01L1/047 , F02D41/26 , F02P5/15
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.
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公开(公告)号：US09086020B2
公开(公告)日：2015-07-21
申请号：US13654244
申请日：2012-10-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi , Louis J. Serrano
CPC classification number: F02D17/02 , F02D13/06 , F02D37/02 , F02D41/0087 , F02D2041/286 , F02D2200/101
Abstract: In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the firing fraction is selected from a set of available firing fractions, with the set of available firing fractions varying as a function of engine speed such that more firing fractions are available at higher engine speeds than at lower engine speeds. The controller then direct firings in a skip fire manner that delivers the selected fraction of firings.
Abstract translation: 在各种描述的实施例中，跳过火控制用于传递期望的发动机输出。 控制器确定跳过火焰射击分数以及（适当地）适合于递送请求的输出的相关联的引擎设置。 在一个方面，燃烧部分选自一组可用的燃烧部分，其中可用的燃烧部分的集合作为发动机速度的函数而变化，使得在较高的发动机转速下比在较低的发动机转速下更多的燃烧部分可用。 然后，控制器以点火方式直接点火，从而提供所选择的点火分数。
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公开(公告)号：US08839766B2
公开(公告)日：2014-09-23
申请号：US13799389
申请日：2013-03-13
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano
CPC classification number: F02D41/0087 , F02D2250/21
Abstract: A variety of methods and arrangements for managing transitions between operating states for an engine are described. In one aspect, an engine is operated in a particular operating state. A transition is made to another operating state. During that transition, the engine is operated in a skip fire manner.
Abstract translation: 描述了用于管理用于发动机的操作状态之间的转换的各种方法和布置。 在一个方面，发动机在特定的操作状态下操作。 转换到另一个操作状态。 在过渡期间，发动机以跳火方式运行。
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公开(公告)号：US11549455B2
公开(公告)日：2023-01-10
申请号：US16839651
申请日：2020-04-03
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Steven E. Carlson , Louis J. Serrano , Mark A. Wilcutts , Vijay Srinivasan
Abstract: An internal combustion engine operates so that it delivers zero or negative torque. The engine operates in either a deceleration cylinder cut off (DCCO) mode or skip cylinder compression braking mode. In the skip cylinder compression braking mode, selected working cycles of selected working chambers are operated in a compression release braking mode. Accordingly, individual working chambers are sometimes not fired and sometimes operated in the compression release braking mode while the engine is operating in the skip cylinder compression braking mode.
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公开(公告)号：US11459965B2
公开(公告)日：2022-10-04
申请号：US17186979
申请日：2021-02-26
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Vijay Srinivasan , Louis J. Serrano , Xiaoping Cai , J. Steven Kolhouse , Avra Brahma , Adrian P. Dale
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.
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Patent Agency Ranking
公开(公告)号：US20220307434A1
公开(公告)日：2022-09-29
申请号：US17213387
申请日：2021-03-26
Applicant: Tula Technology, Inc. , Cummins, Inc.
Inventor： Louis J. Serrano , Kevin Shikui Chen , Xiaoping Cai , John Fuerst
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.
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公开(公告)号：US11261807B2
公开(公告)日：2022-03-01
申请号：US17183856
申请日：2021-02-24
Applicant: Tula Technology, Inc.
Inventor： Jerry F. Fuschetto , Matthew A. Younkins , Ihab S. Soliman , Mark A. Wilcutts , Steven E. Carlson , Louis J. Serrano
Abstract: Various methods and arrangements for improving fuel economy and noise, vibration, and harshness (NVH) in a skip fire controlled engine are described. An engine controller dynamically selects a gas spring type for a skipped firing opportunity. Determination of the skip/fire pattern and gas spring type may be made on a firing opportunity by firing opportunity basis.
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公开(公告)号：US11208964B2
公开(公告)日：2021-12-28
申请号：US17002309
申请日：2020-08-25
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Kian Eisazadeh-Far , Steven E. Carlson , Louis J. Serrano
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.
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公开(公告)号：US10968841B2
公开(公告)日：2021-04-06
申请号：US16680030
申请日：2019-11-11
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi , Louis J. Serrano
Abstract: Skip fire engine control using a first order sigma delta based firing controller is described. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The operational firing fraction is selected from a set of available firing fractions. The engine controller uses a first order sigma delta based converter to direct working cycle firings in a skip fire manner that delivers the selected firing fraction. The converter includes or functions substantially equivalent to a first order sigma delta converter and may be implemented any of: algorithmically using a processor; using digital, analog or hybrid components; using a lookup table; or using other appropriate techniques. In some embodiments firing decisions are made on a working cycle by working cycle basis. The described approach may be used in gasoline engines, diesel engines, turbocharged or supercharged engines, or others.
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公开(公告)号：US10900425B2
公开(公告)日：2021-01-26
申请号：US16460491
申请日：2019-07-02
Applicant: Tula Technology, Inc.
Inventor： Xin Yuan , Louis J. Serrano
Abstract: Methods and apparatus for conducting engine related diagnostics during cylinder cutoff (DCCO) operation of an engine are described. In one aspect, changes in the amount of oxygen in the exhaust system are monitored while the engine is operating in the DCCO mode. Changes in the oxygen level are then analyzed to determine various faults. Some of the faults that can be detected using this approach include cylinder deactivation faults and exhaust system leak faults. In another aspect, the rate of change of manifold pressure within the air intake manifold is monitored while operating the engine in a DCCO mode with the throttle closed. A fault indicative of potential air leakage into the air intake manifold is indicated when it is determined that the rate of change of the manifold pressure exceeds a designated threshold.
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