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公开(公告)号：US20210262405A1
公开(公告)日：2021-08-26
申请号：US17314785
申请日：2021-05-07
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Matthew A. YOUNKINS
IPC: F02D41/00 , F02D41/04 , F02D13/06 , F02D13/02 , F02D17/02 , F02D41/10 , F02D41/12 , F02P5/145 , F01L1/047 , F02D41/26 , F02P5/15 , F02D11/02
Abstract: In various aspects, internal combustion engines, engine controllers and methods of controlling engines are described. The engine includes a camshaft and a two cylinder sets. Cylinders in the first are deactivatable and cylinders in the second set may be fired at high or low output levels. The air charge for each fired working cycle is set based on whether a high or low torque output is selected. In some implementations, the camshaft is axially shiftable between first and second positions. First cam lobes are configured to cause their associated cylinders to intake a large air charge during intake strokes that occur when the camshaft is in the first position. Second cam lobes for cylinders in the second set cause their associated cylinders to intake a smaller air charge when the camshaft is in the second position. Second cam lobes for cylinders in the first set deactivate their associated cylinders.
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公开(公告)号：US20200158044A1
公开(公告)日：2020-05-21
申请号：US16749607
申请日：2020-01-22
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mark A. WILCUTTS
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 dynamic firing level modulation manner. A smoothing torque is determined by adaptive control 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 firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US20190248221A1
公开(公告)日：2019-08-15
申请号：US15894521
申请日：2018-02-12
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Matthew A. YOUNKINS , Vijay SRINIVASAN
CPC classification number: B60K5/1283 , B60W10/06 , B60W10/30 , B60W30/20 , B60W2030/206 , B60W2510/06 , B60W2510/0638 , B60W2710/06 , B60W2720/00 , B60Y2300/205 , B60Y2400/48 , F02D17/02 , F02D41/0087 , F16F15/04 , F16F15/121 , F16F2228/066
Abstract: Systems and methods are described for mitigating vehicle vibration through the control of a variable spring absorber that is part of a powertrain that includes the engine. In some such embodiments, an absorption frequency of the variable spring absorber is tuned in a feed forward manner based at least in part on the current engine speed and a factor indicative of the minimum repeating firing sequence cycle length associated with the current effective firing fraction (which in many implementations may be the denominator of the firing fraction).
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公开(公告)号：US20190170074A1
公开(公告)日：2019-06-06
申请号：US16270349
申请日：2019-02-07
Applicant: Tula Technology Inc. , GM Global Technology Operations LLC
Inventor： Mark A. SHOST , Louis J. SERRANO , Steven E. CARLSON , Vijay SRINIVASAN , Eric J. DEFENDERFER , Nitish J. WAGH , Randall S. BEIKMANN , Jinbiao LI , Xin YUAN , Li-Chun CHIEN
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.
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公开(公告)号：US20180216541A1
公开(公告)日：2018-08-02
申请号：US15937538
申请日：2018-03-27
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 skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations.
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Patent Agency Ranking
公开(公告)号：US20170342921A1
公开(公告)日：2017-11-30
申请号：US15679462
申请日：2017-08-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Kian EISAZADEH-FAR , Steven E. CARLSON , Louis J. SERRANO , Ying REN , Joel D. VAN ESS
CPC classification number: F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012
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：US20170306864A1
公开(公告)日：2017-10-26
申请号：US15646476
申请日：2017-07-11
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Louis J. SERRANO , Xin YUAN , Steven E. CARLSON , Siamak HASHEMI , Ryan A. KUHLENBECK
CPC classification number: F02D37/02 , F02D17/02 , F02D41/0002 , F02D41/0087 , F02D2041/286 , F02D2200/0406 , F02D2200/101 , F02P5/1504 , Y02T10/42 , Y02T10/46
Abstract: Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions transitions are implemented gradually, preferably in a manner that relatively closely tracks manifold filling dynamics. In some embodiments, the commanded firing fraction is altered each firing opportunity. Another approach contemplates altering the commanded firing fraction by substantially the same amount each firing opportunity for at least a portion of the transition. These approaches work particularly well when the commanded firing fraction is provided to a skip fire controller that includes an accumulator functionality that tracks the portion of a firing that has been requested, but not delivered, or vice versa. In various embodiments, commanded firing fraction changes are delayed relative to initiation of the change in throttle position to help compensate for inherent delays associated with changing the manifold air pressure.
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公开(公告)号：US20170234254A1
公开(公告)日：2017-08-17
申请号：US15147690
申请日：2016-05-05
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO
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.
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公开(公告)号：US20140041630A1
公开(公告)日：2014-02-13
申请号：US13963759
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Steven E. CARLSON , Xin YUAN , Louis J. SERRANO , Joshua P. SWITKES , Biswa R. GHOSH , Norman C. LO
IPC: F02P9/00
CPC classification number: F02P9/00 , F02D41/0082 , F02D41/0087 , F02D41/1402 , F02D41/3058 , F02D2200/602 , F02P5/1506 , F02P7/02 , Y02T10/46
Abstract: Various methods and arrangements for operating a skip fire engine control system are described. In one aspect of the invention, a distinct firing sequence is determined for each bank of working chambers that is used to operate the bank in a skip fire manner. Each firing sequence uses a different firing fraction. In another aspect of the invention, a determination is made as to whether a firing sequence should be dynamically generated or selected from a set of predefined firing sequences.
Abstract translation: 描述了用于操作跳火消防车控制系统的各种方法和装置。 在本发明的一个方面中，针对用于以跳火方式操作银行的每一组工作室确定了不同的点火顺序。 每个射击序列使用不同的射击分数。 在本发明的另一方面中，确定是否应从一组预定义的触发序列中动态生成或选择点火序列。
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20.发明公开公开(公告)号：US20230392561A1
公开(公告)日：2023-12-07
申请号：US17830925
申请日：2022-06-02
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , Shikui Kevin CHEN , Xi LUO , Robert C. WANG , Xiaoping CAI , Vijay SRINIVASAN
CPC classification number: F02D41/0087 , F02D41/2403 , F02D41/0085 , F02D2200/1002 , F02D2200/50 , F02D2200/0802
Abstract: A system and method for operating an ICE by (a) generating a running history of one or more-cylinder events per cylinder, and (b) using the running history to select a least-used non-rotating firing pattern, among a plurality of non-rotating firing patterns, provided for each firing fraction less than one (1). By making the least used selection based on the running history, unequal usage among cylinders of the ICE can be mitigated.
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