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21.发明申请公开(公告)号：US20190226378A1
公开(公告)日：2019-07-25
申请号：US16373364
申请日：2019-04-02
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin CHEN , Matthew A. YOUNKINS
Abstract: A skip fire control that relies on a combination of a torque request, exhaust temperature, and air-fuel ratio in determining firing density is described. Also, skipped firing opportunities may either pump or not pump air into an exhaust system, allowing an exhaust gas temperature in the exhaust system to be controlled or modulated. The present invention is also related to Dynamic Skip Fire (DSF), where a decision to either fire or skip cylinders is made every firing opportunity.
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公开(公告)号：US20190178135A1
公开(公告)日：2019-06-13
申请号：US16275881
申请日：2019-02-14
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：US20170218866A1
公开(公告)日：2017-08-03
申请号：US15487127
申请日：2017-04-13
Applicant: Tula Technology, Inc.
Inventor： Mark A. SHOST , Matthew A. YOUNKINS
CPC classification number: F02D41/0082 , F01L1/146 , F01L1/185 , F01L1/34 , F01L13/0005 , F01L13/0026 , F01L2013/001 , F01L2013/0068 , F01L2013/0073 , F01L2013/103 , F01L2105/00 , F01L2800/08 , F01L2820/01 , F02B75/20 , F02B2075/1816 , F02D13/06 , F02D17/02 , F02D41/0002 , F02D41/0087 , F02D2041/0012 , Y02T10/18 , Y02T10/42
Abstract: Internal combustion engine having cam actuated valves that can be controlled to facilitate the use of different air charge levels in different cylinders or sets of cylinders are described. In one aspect a first set of cylinders is operated in a skip fire manner in which the corresponding cylinders are deactivated during skipped working cycles. Cam actuated intake valves associated with a second set of cylinders are operated differently so that the air charge in the cylinders in the second set is different than the air charge in fired cylinders subject to the skip fire control. According to another aspect, an engine having cam actuated intake valves is operated in a dynamic firing level modulation mode. During the dynamic firing level modulation operation, the cam actuated intake valves are controlled in at least two different manners to such that different cylinder working cycles have different air charges.
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公开(公告)号：US20170122237A1
公开(公告)日：2017-05-04
申请号：US15401516
申请日：2017-01-09
Applicant: Tula Technology, Inc.
Inventor： Adya S. TRIPATHI , Chester J. SILVESTRI , Christopher W. CHANDLER , Christopher C. HAND , Joshua P. SWITKES , Mark A. WILCUTTS , Matthew A. YOUNKINS
CPC classification number: F02D41/0087 , F02B75/02 , F02B2075/027 , F02D13/06 , F02D17/02 , F02D37/02 , F02D41/1401 , F02D41/26 , F02D41/266 , F02D41/30 , F02D2200/0614 , F02D2200/602 , F02D2250/18 , F02D2400/02 , F02P5/045 , F02P5/1512 , Y02T10/46
Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles.
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公开(公告)号：US20170101956A1
公开(公告)日：2017-04-13
申请号：US15384924
申请日：2016-12-20
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN
CPC classification number: F02D41/221 , F02B77/082 , F02D13/06 , F02D17/02 , F02D35/023 , F02D35/024 , F02D41/0087 , F02D41/1401 , F02D41/1448 , F02D41/1498 , F02D41/22 , F02D41/3058 , F02D2041/001 , F02D2041/1412 , F02D2041/1433 , F02D2041/227 , G01L3/00 , G01M15/042 , G01P15/00 , Y02T10/18
Abstract: Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, for each skip fire working cycle, an expected exhaust pressure is determined for a time period corresponding to a potential exhaust event. One or more exhaust gas pressure sensors are then used to measure an actual exhaust pressure during the potential exhaust period. The actual exhaust pressure is compared to the expected exhaust pressure to determine whether a valve actuation fault has occurred. A variety of valve actuation faults can be identified using the described approach. In some embodiments pressure sensors are deployed in the runners of the exhaust manifold.
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Patent Agency Ranking
公开(公告)号：US20160040614A1
公开(公告)日：2016-02-11
申请号：US14919018
申请日：2015-10-21
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Louis J. SERRANO
CPC classification number: F02D41/0087 , F02D13/0269 , F02D13/06 , F02D17/02 , F02D37/02 , F02D41/126 , F02D41/1401 , F02D41/266 , F02D2200/602 , F02D2250/18 , F02D2400/02 , F02P5/1512 , F02P9/002 , Y02T10/142 , Y02T10/46
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, engine controllers, arrangements and systems related to the above method are also described.
Abstract translation: 一方面，对内燃机的运转控制方法进行说明。 发动机以跳火方式操作，使得跳过所选择的跳过的工作循环并且激发选定的主动工作循环以输送期望的发动机输出。 对于每个烧制工作室选择特定水平的扭矩输出。 还描述了与上述方法相关的各种方法，发动机控制器，布置和系统。
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公开(公告)号：US20160024981A1
公开(公告)日：2016-01-28
申请号：US14858046
申请日：2015-09-18
Applicant: Tula Technology Inc.
Inventor： John W. PARSELS , Matthew A. YOUNKINS , Shikui Kevin CHEN
CPC classification number: F01L13/0005 , F01L1/18 , F01L9/02 , F01L9/04 , F01L2013/001 , F01L2820/01 , F01L2820/033 , F01L2820/045 , F02D13/06 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , Y02T10/18 , Y02T10/40
Abstract: A variety of methods and devices for controlling the operation of the intake and exhaust valves in an internal combustion engine during skip fire operation are described. In various embodiments, an exhaust valve monitor or other suitable mechanism is used to detect exhaust valve actuation faults. When an exhaust valve actuation fault is detected for a particular cylinder, the corresponding intake valve is deactivated (or not activated) in circumstances when it would otherwise be activated in order to prevent the intake valve from opening into a cylinder that contains high pressure combustion gases. The described approach is particularly beneficial when skip fire operation is combined with cylinder deactivation so that air is not pumped through the cylinders during the skipped working cycles.
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28.发明公开公开(公告)号：US20230287839A1
公开(公告)日：2023-09-14
申请号：US18317812
申请日：2023-05-15
Applicant: Tula Technology, Inc.
Inventor： John W. PARSELS , Matthew A. YOUNKINS
CPC classification number: F02D41/0087 , F02D41/1498 , F02D41/307 , B60W30/20 , F02D41/0002 , F02D41/3058 , F02D2041/0012
Abstract: A variety of methods and arrangements for mitigating powertrain and accessory torsional oscillation through electric motor/generator control are described. In one aspect, working chamber air charge and crank position are determined prior to starting an engine. During the engine startup period, an electric motor/generator supplies a smoothing torque to at least partially cancel engine torque variations.
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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：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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