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公开(公告)号：US09650971B2
公开(公告)日：2017-05-16
申请号：US13963686
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Steven E. Carlson , Louis J. Serrano , Xin Yuan , Li-Chun Chien , Adya S. Tripathi
CPC classification number: F02D41/00 , F02D11/105 , F02D17/02 , F02D41/0087 , F02D41/0225 , F02D41/2422 , F02D2250/18
Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.
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22.发明授权Noise, vibration and harshness reduction in a skip fire engine control system 有权跳火消防车控制系统的噪音，振动和粗糙度降低公开(公告)号：US09512794B2
公开(公告)日：2016-12-06
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
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。
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公开(公告)号：US10954877B2
公开(公告)日：2021-03-23
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：US10787979B2
公开(公告)日：2020-09-29
申请号：US16278075
申请日：2019-02-16
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：US10508604B2
公开(公告)日：2019-12-17
申请号：US15937538
申请日：2018-03-27
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi , Louis J. Serrano
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：US10196995B2
公开(公告)日：2019-02-05
申请号：US15679419
申请日：2017-08-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Kian Eisazadeh-Far , Steven E. Carlson , Ying Ren , Joel D. Van Ess
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：US10107211B2
公开(公告)日：2018-10-23
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
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：US09964051B2
公开(公告)日：2018-05-08
申请号：US15357398
申请日：2016-11-21
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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公开(公告)号：US09745905B2
公开(公告)日：2017-08-29
申请号：US14857371
申请日：2015-09-17
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：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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