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公开(公告)号：US11359562B2
公开(公告)日：2022-06-14
申请号：US17463814
申请日：2021-09-01
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Xin Yuan , John W. Parsels , Mohammad R. Pirjaberi , Mark A. Wilcutts , Masaki Nagashima
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.
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公开(公告)号：US11352966B2
公开(公告)日：2022-06-07
申请号：US17082981
申请日：2020-10-28
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Siamak Hashemi , Vijay Srinivasan , Srihari Kalluri , Andrew W. Phillips , Mark A. Wilcutts , Louis J. Serrano , Shikui Kevin Chen
Abstract: Controllers and methods for managing transitions into and/or out of a cylinder cut off mode are described. In some embodiments, a skip fire based transition into a cylinder cut off mode is used in which the fraction of working cycles that are fired is gradually reduced to a threshold firing fraction. Once the threshold firing fraction has been reached, all of the working chambers are deactivated.
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公开(公告)号：US11280276B2
公开(公告)日：2022-03-22
申请号：US17192252
申请日：2021-03-04
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi , Louis J. Serrano
Abstract: Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The engine controller selects an operational firing fraction from a set of available firing fractions. A firing controller then directs cylinder firings in a skip fire manner that delivers the selected operational firing fraction. The firing controller includes an accumulator that helps smooth transitions between different firing fractions.
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公开(公告)号：US11236690B2
公开(公告)日：2022-02-01
申请号：US17332763
申请日：2021-05-27
Applicant: Tula Technology, Inc.
Inventor： Yongyan Cao , Elliott A. Ortiz-Soto , Louis J. Serrano
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.
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公开(公告)号：US20210040904A1
公开(公告)日：2021-02-11
申请号：US17082981
申请日：2020-10-28
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Siamak Hashemi , Vijay Srinivasan , Srihari Kalluri , Andrew W. Phillips , Mark A. Wilcutts , Louis J. Serrano , Shikui Kevin Chen
Abstract: Controllers and methods for managing transitions into and/or out of a cylinder cut off mode are described. In some embodiments, a skip fire based transition into a cylinder cut off mode is used in which the fraction of working cycles that are fired is gradually reduced to a threshold firing fraction. Once the threshold firing fraction has been reached, all of the working chambers are deactivated.
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Patent Agency Ranking
公开(公告)号：US10830166B2
公开(公告)日：2020-11-10
申请号：US16246888
申请日：2019-01-14
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Xin Yuan , John W. Parsels , Mohammad R. Pirjaberi , Mark A. Wilcutts , Masaki Nagashima
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.
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公开(公告)号：US10578037B2
公开(公告)日：2020-03-03
申请号：US15918258
申请日：2018-03-12
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：US10400691B2
公开(公告)日：2019-09-03
申请号：US15894548
申请日：2018-02-12
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Vijay Srinivasan , Geoffrey Routledge , Mark A. Shost , Biswa R. Ghosh , Mark A. Wilcutts , Matthew A. Younkins , Ying Ren
IPC: F02D41/00 , F02D41/04 , F02D13/02 , F02D13/06 , F02P5/15 , F02D41/26 , F01L1/047 , F02P5/145 , F02D41/12 , F02D41/10 , F02D17/02 , G10K11/178 , F02N11/08 , G10K11/16 , F16F15/02 , F02P9/00
Abstract: Systems and methods for reducing noise or vibration generated by an internal combustion engine are described. An engine controller is arranged to operate the working chambers of the engine in a cylinder output level modulation manner. A noise/vibration reduction unit actively control of a device that is not a part of the powertrain. The device is controlled in a feed forward manner to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a characteristic of the cylinder output level modulation operation of the engine.
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公开(公告)号：US10072592B2
公开(公告)日：2018-09-11
申请号：US15485000
申请日：2017-04-11
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Louis J. Serrano
IPC: F02D13/06 , F02D41/00 , F01L1/047 , F02D13/02 , F02D17/02 , F02D11/02 , F02D41/26 , F02P5/15 , F02D41/12
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：US10060368B2
公开(公告)日：2018-08-28
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 , 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.
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