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公开(公告)号：US10995726B2
公开(公告)日：2021-05-04
申请号：US15940366
申请日：2018-03-29
申请人： Woodward, Inc.
发明人： David C. Petruska , Sai Venkataramanan , Suraj Nair , Mark Notarfrancesco , Monte Wegner , Andy Vlietstra
IPC分类号： F02P17/12 , F02P17/10 , F02P3/045 , F02P3/08 , F02P3/05 , F02P5/15 , F02P9/00 , F02P15/08 , F02P17/02 , F02P3/01 , F02P11/06
摘要： The subject matter of this specification can be embodied in, among other things, a method that includes receiving a collection of measurements of electric current amplitude in a primary winding of an engine ignition system having the primary winding and a spark plug, identifying an ignition start time, identifying an inflection point based on the plurality of measurements, determining an inflection point time representative of a time at which the identified inflection point occurred, determining a spark start time based on an amount of time between the ignition start time and the inflection point time, and providing a signal indicative of the spark start time.
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公开(公告)号：US20200318570A1
公开(公告)日：2020-10-08
申请号：US16376909
申请日：2019-04-05
申请人： Woodward, Inc.
摘要： A method of controlling combustion in an internal combustion engine includes measuring parameters of combustion in a cylinder of the engine during a combustion phase of the cylinder, after igniting an air/fuel charge in the cylinder, and calculating the heat release of combustion in the cylinder based on the measured parameters. An auto-ignition event of the air/fuel charge is identified based on the calculated heat release, and, based at least in part on the identified auto-ignition event, at least one of ignition timing in the cylinder for the next combustion phase of the cylinder or an amount of exhaust gas supplied to the cylinder for the next combustion phase of the cylinder is controlled to cause an auto-ignition event of the air/fuel charge in the next combustion phase to shift toward a specified crank angle.
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公开(公告)号：US10234496B2
公开(公告)日：2019-03-19
申请号：US15044985
申请日：2016-02-16
申请人： Woodward, Inc.
发明人： Suraj Nair , Doyle Kent Stewart
摘要： The subject matter of this specification can be embodied in, among other things, a method that includes evaluating an analog electrical current waveform, determining a Boolean waveform based on the evaluated analog electrical current waveform, determining a collection of one or more first durations based on one or more on times identified from the Boolean waveform, determining a collection of one or more second durations based on one or more off times identified from the Boolean waveform, comparing the first durations and the second durations, determining, based on the comparing, an event based on the comparing, identifying a time at which the event occurred, and providing the time as a completion time.
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公开(公告)号：US20180252752A1
公开(公告)日：2018-09-06
申请号：US15449514
申请日：2017-03-03
申请人： Woodward, Inc.
CPC分类号： G01R19/04 , F02D41/20 , F02D41/2096 , F02D41/221 , F02D41/2422 , F02D41/2467 , F02D41/248 , F02D2041/2037 , F02D2041/2048 , F02D2041/2055 , F02D2200/0618 , F02D2200/063 , F16K37/0083 , G01R17/00 , H01F7/1805 , H01F7/1844
摘要： The subject matter of this specification can be embodied in, among other things, a method for characterizing a fluid injector that includes receiving a collection of waveform data, identifying a pull locus, determining a detection threshold level value, identifying a first subset of the collection of data representative of a selected first electrical waveform of the collection of electrical waveforms, identifying an opening value, identifying a representative closing value, identifying an anchor value, identifying a second subset of the collection of data based on the collection of data, the pull locus, the first subset, and the opening value, identifying a maximum electrical value, identifying an opening locus based the collection of data, the anchor value, and the maximum electrical value, identifying a hold value, and providing characteristics associated with the fluid injector comprising the pull locus, the opening locus, the hold value, the anchor value, and the representative closing value.
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公开(公告)号：US11125180B2
公开(公告)日：2021-09-21
申请号：US17188346
申请日：2021-03-01
申请人： Woodward, Inc.
摘要： A method of controlling combustion in an internal combustion engine includes measuring parameters of combustion in a cylinder of the engine during a combustion phase of the cylinder, after igniting an air/fuel charge in the cylinder, and calculating the heat release of combustion in the cylinder based on the measured parameters. An auto-ignition event of the air/fuel charge is identified based on the calculated heat release, and, based at least in part on the identified auto-ignition event, at least one of ignition timing in the cylinder for the next combustion phase of the cylinder or an amount of exhaust gas supplied to the cylinder for the next combustion phase of the cylinder is controlled to cause an auto-ignition event of the air/fuel charge in the next combustion phase to shift toward a specified crank angle.
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公开(公告)号：US10995683B2
公开(公告)日：2021-05-04
申请号：US15967150
申请日：2018-04-30
申请人： WOODWARD, INC.
发明人： Suraj Nair , Jason Barta
摘要： The subject matter of this specification can be embodied in, among other things, a method that includes determining a gas supplement ratio (GSR) of a mixture of natural gas and diesel, identifying a start event of a stroke of a piston of a combustion cylinder of a dual-fuel engine, identifying a first observation period that is offset from the start event based on the GSR, identifying a second observation period based on the GSR, receiving signals representative of vibration of the combustion cylinder during the stroke, identifying an abnormal combustion event based on the signals, determining that abnormal combustion occurred during at least one of the first observation period and the second observation period, and causing a change in operation of the engine based determining that abnormal combustion occurred during at least one of the first observation period and the second observation period.
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公开(公告)号：US10712373B2
公开(公告)日：2020-07-14
申请号：US16523601
申请日：2019-07-26
申请人： Woodward, Inc.
摘要： The subject matter of this specification can be embodied in, among other things, a method for characterizing a fluid injector that includes receiving a collection of waveform data, identifying a pull locus, determining a detection threshold level value, identifying a first subset of the collection of data representative of a selected first electrical waveform of the collection of electrical waveforms, identifying an opening value, identifying a representative closing value, identifying an anchor value, identifying a second subset of the collection of data based on the collection of data, the pull locus, the first subset, and the opening value, identifying a maximum electrical value, identifying an opening locus based the collection of data, the anchor value, and the maximum electrical value, identifying a hold value, and providing characteristics associated with the fluid injector comprising the pull locus, the opening locus, the hold value, the anchor value, and the representative closing value.
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公开(公告)号：US20170234920A1
公开(公告)日：2017-08-17
申请号：US15044985
申请日：2016-02-16
申请人： Woodward, Inc.
发明人： Suraj Nair , Doyle Kent Stewart
CPC分类号： G01R31/06 , F02D41/20 , F02D2041/2024 , F02D2041/2055 , F02D2041/2058 , F02D2041/2086 , H01F7/064
摘要： The subject matter of this specification can be embodied in, among other things, a method that includes evaluating an analog electrical current waveform, determining a Boolean waveform based on the evaluated analog electrical current waveform, determining a collection of one or more first durations based on one or more on times identified from the Boolean waveform, determining a collection of one or more second durations based on one or more off times identified from the Boolean waveform, comparing the first durations and the second durations, determining, based on the comparing, an event based on the comparing, identifying a time at which the event occurred, and providing the time as a completion time.
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公开(公告)号：US10935449B2
公开(公告)日：2021-03-02
申请号：US15971957
申请日：2018-05-04
申请人： WOODWARD, INC.
IPC分类号： G01L23/22 , F02D19/06 , F02D19/08 , F02D35/02 , F02D41/00 , F02D41/22 , F02D41/30 , F02D19/10 , F02B77/08
摘要： A method of detecting uncontrolled combustion in an internal combustion engine includes sampling in-cylinder pressure sensor configured to measure pressure in a cylinder of the engine and generate a pressure signal, calculating a combustion intensity metric based on the pressure signal, determining a parameter describing how close the engine is to an uncontrolled combustion condition based on the combustion intensity metric, and controlling a substitution rate of a first fuel and a second fuel based on one or more of the parameter and the combustion intensity metric.
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公开(公告)号：US10401398B2
公开(公告)日：2019-09-03
申请号：US15449514
申请日：2017-03-03
申请人： Woodward, Inc.
摘要： The subject matter of this specification can be embodied in, among other things, a method for characterizing a fluid injector that includes receiving a collection of waveform data, identifying a pull locus, determining a detection threshold level value, identifying a first subset of the collection of data representative of a selected first electrical waveform of the collection of electrical waveforms, identifying an opening value, identifying a representative closing value, identifying an anchor value, identifying a second subset of the collection of data based on the collection of data, the pull locus, the first subset, and the opening value, identifying a maximum electrical value, identifying an opening locus based the collection of data, the anchor value, and the maximum electrical value, identifying a hold value, and providing characteristics associated with the fluid injector comprising the pull locus, the opening locus, the hold value, the anchor value, and the representative closing value.
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