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公开(公告)号：US20200080500A1
公开(公告)日：2020-03-12
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：US20200040788A1
公开(公告)日：2020-02-06
申请号：US16654373
申请日：2019-10-16
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN , Mark A. WILCUTTS
Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.
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公开(公告)号：US10519876B2
公开(公告)日：2019-12-31
申请号：US16035273
申请日：2018-07-13
Applicant: Tula Technology, Inc.
Inventor： Vijay Srinivasan , Louis J. Serrano , Siamak Hashemi , Robert S. Bailey , Geoffrey Routledge
Abstract: Methods and controllers are described that facilitate the determination of an operational skip fire firing fraction for an engine based at least in part noise levels and/or vehicle vibration levels that are not induced by engine operation. In some embodiments, the firing fraction is determined based at least in part of noise or vibrations associated with road roughness and/or cabin noise levels.
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公开(公告)号：US10436133B2
公开(公告)日：2019-10-08
申请号：US16038622
申请日：2018-07-18
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：US10393085B2
公开(公告)日：2019-08-27
申请号：US15830388
申请日：2017-12-04
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano
Abstract: Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with cylinder output level modulation operation of an engine such as dynamic skip fire operation of the engine and/or multi-charge level operation of the engine.
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Patent Agency Ranking
公开(公告)号：US20190220009A1
公开(公告)日：2019-07-18
申请号：US16361350
申请日：2019-03-22
Applicant: Tula Technology, Inc.
Inventor： Ram SUBRAMANIAN , Louis J. SERRANO , Matthew A. YOUNKINS
CPC classification number: G05D1/0061 , B60W30/1882 , F02D11/105 , F02D17/02 , F02D29/02 , F02D41/0087 , F02D41/1402 , F02D2200/501 , F02D2250/18 , F02P5/1512 , G05D1/0005
Abstract: The present invention relates generally to techniques for improving fuel efficiency of a vehicle powered by an internal combustion engine capable of operating at various displacement levels. An autonomous driving unit or cruise controller selects when possible an engine torque output that corresponds to a fuel efficient displacement level. The resultant vehicle speed profile and NVH level is acceptable to vehicle occupants.
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公开(公告)号：US20190178180A1
公开(公告)日：2019-06-13
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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228.发明申请公开(公告)号：US20190145859A1
公开(公告)日：2019-05-16
申请号：US16180703
申请日：2018-11-05
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin CHEN , Aditya MANDAL , Li-Chun CHIEN , Elliot ORTIZ-SOTO
Abstract: Using machine learning for misfire detection in a Dynamic firing level modulation controlled internal combustion engine is described. A neural network is used to calculate expected crank acceleration from various inputs, including the dynamically defined cylinder skip fire sequence. The output of the neural network is then compared to a signal indicative of the measured crank acceleration. Based the comparison, a prediction is made if a misfire has occurred or not. In alternative embodiment, the neural network is expanded to include the measured crank acceleration as an additional input. With the latter embodiment, the neural network is arranged to directly predict misfire events.
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公开(公告)号：US10253706B2
公开(公告)日：2019-04-09
申请号：US15628309
申请日：2017-06-20
Applicant: Tula Technology, Inc.
Inventor： Allan J. Kotwicki , Joel D. Van Ess , Mark A. Wilcutts
Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating working chamber air charge during engine operations. The described approaches and devices are well suited for use in dynamic firing level modulation controlled engines. Manifold pressure is estimated for a time corresponding to an induction event associated with a selected working cycle. The manifold pressure estimate accounts for impacts from one or more intervening potential induction events that will occur between the time that the manifold pressure is estimated and the time that the induction event associated with the selected working cycle occurs. The estimated manifold pressure is used in the estimation of the air charge for the selected working cycle. The described approach may be used to individually calculate the air charge for each induction event at any time that the engine is operating in a mode that can benefit from the individual cylinder air charge estimations.
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公开(公告)号：US10221786B2
公开(公告)日：2019-03-05
申请号：US15340291
申请日：2016-11-01
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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