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1.发明申请公开(公告)号：US20190178193A1
公开(公告)日：2019-06-13
申请号：US15838220
申请日：2017-12-11
发明人： Christopher Paul Glugla , Gopichandra Surnilla , Imtiaz Ali , Lyth Alobiedat , Mohannad Hakeem , John Eric Rollinger , Paul Algis Baltusis
摘要： Methods and systems for diagnosing operation of a compression ratio adjusting mechanism are described. In one example, an output of a pressure sensor is sampled and an assessment of the engine's present compression ratio is made after adjusting sampling of the output. Engine operation may be adjusted responsive to whether or not degradation of the compression ratio adjusting mechanism is indicated.
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公开(公告)号：US10935462B2
公开(公告)日：2021-03-02
申请号：US15963974
申请日：2018-04-26
摘要： Methods and systems are provided for estimating an actual compression ratio of an engine cylinder based on the electric current applied to an actuator of the associated variable compression ratio mechanism. The compression ratio is estimated as a function of both a value and a location, relative to cylinder piston position, of a peak holding current applied by an electric motor on the actuator to maintain the actuator at a commanded compression ratio setting. In this way, the vehicle control system may more accurately infer the current actual compression ratio of each cylinder.
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公开(公告)号：US10914243B2
公开(公告)日：2021-02-09
申请号：US16455477
申请日：2019-06-27
摘要： Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations.
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公开(公告)号：US20200025113A1
公开(公告)日：2020-01-23
申请号：US16039181
申请日：2018-07-18
IPC分类号： F02D15/02
摘要： Systems and methods for operating an engine that includes a compression ratio linkage for adjusting engine compression ratio are described. The systems and methods provide different ways of changing a compression ratio of an engine based on forecast or anticipated engine operating conditions. In one example, the forecast or anticipated engine operating conditions may include a forecast or anticipated transmission gear shift.
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5.发明授权公开(公告)号：US10450983B2
公开(公告)日：2019-10-22
申请号：US15838220
申请日：2017-12-11
发明人： Christopher Paul Glugla , Gopichandra Surnilla , Imtiaz Ali , Lyth Alobiedat , Mohannad Hakeem , John Eric Rollinger , Paul Algis Baltusis
摘要： Methods and systems for diagnosing operation of a compression ratio adjusting mechanism are described. In one example, an output of a pressure sensor is sampled and an assessment of the engine's present compression ratio is made after adjusting sampling of the output. Engine operation may be adjusted responsive to whether or not degradation of the compression ratio adjusting mechanism is indicated.
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公开(公告)号：US20190120160A1
公开(公告)日：2019-04-25
申请号：US15788074
申请日：2017-10-19
CPC分类号： F02D41/2451 , F02B75/04 , F02B75/045 , F02D15/02 , F02D41/0047 , F02D41/005 , F02D41/0052 , F02D41/008
摘要： Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations.
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公开(公告)号：US20190120147A1
公开(公告)日：2019-04-25
申请号：US15788036
申请日：2017-10-19
CPC分类号： F02D15/00 , F02B75/04 , F02B75/044 , F02D13/0215 , F02D13/0261 , F02D35/027 , F02D41/0065 , F02D41/2451 , F02D2200/0611 , F02D2200/1002 , F02D2200/101 , F02D2200/602 , F02D2200/70
摘要： Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations.
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公开(公告)号：US10760514B2
公开(公告)日：2020-09-01
申请号：US15835153
申请日：2017-12-07
摘要： Systems and methods for operating an engine that includes a compression ratio linkage for adjusting engine compression ratio are described. The systems and methods provide different ways of diagnosing the presence or absence of engine misfire in response to engine operating regions that may be more or less prone to torsional engine crankshaft vibration. In one example, engine misfire may be determined responsive to force applied to an engine compression ratio changing linkage.
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公开(公告)号：US20190331553A1
公开(公告)日：2019-10-31
申请号：US15963974
申请日：2018-04-26
摘要： Methods and systems are provided for estimating an actual compression ratio of an engine cylinder based on the electric current applied to an actuator of the associated variable compression ratio mechanism. The compression ratio is estimated as a function of both a value and a location, relative to cylinder piston position, of a peak holding current applied by an electric motor on the actuator to maintain the actuator at a commanded compression ratio setting. In this way, the vehicle control system may more accurately infer the current actual compression ratio of each cylinder.
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公开(公告)号：US20190316530A1
公开(公告)日：2019-10-17
申请号：US16455477
申请日：2019-06-27
摘要： Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations.
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