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公开(公告)号：US10208651B2
公开(公告)日：2019-02-19
申请号：US15422751
申请日：2017-02-02
摘要： In certain embodiments, a unique method and pre-combustion chamber (PCC) structure may ensure very efficient flame propagation of lean fuel-air mixture in natural gas engines by reducing the amount of fuel admitted to the PCC. A PCC may include an enclosed volume of 1-3% of the main combustion chamber volume, with a spark plug and a fuel passage located opposite one or more PCC discharge nozzles to create a relatively richer fuel-air mixture with relatively lower turbulence in the spark plug region and a relatively leaner fuel-air mixture with relatively high turbulence in the nozzle region, which can be reliably and efficiently ignited, resulting in a high velocity flame jet/torch emerging from the prechamber into the main chamber. The PCC may be threaded with a 22 mm×1.5 or ⅞″-18 thread size, to allow the PCC to be screwed into a cylinder head in place of a spark plug.
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2.发明申请Time-varying Spark Current Magnitude to Improve Spark Plug Performance and Durability 审中-公开随时间变化的火花电流大小，以提高火花塞性能和耐用性公开(公告)号：US20140076274A1
公开(公告)日：2014-03-20
申请号：US14028516
申请日：2013-09-16
发明人： Luigi P. Tozzi , David Thomas Lepley , Maria Emmanuella Sotiropoulou , Joseph Martin Lepley , Steven B. Pirko
IPC分类号： F02P13/00
摘要： In certain embodiments, a time-varying spark current ignition system can be applied to improve spark plug ignitability performance and durability as compared to conventional spark ignition systems. Two performance parameters of interest are spark plug life (durability) and spark plug ignitability. In certain embodiments, spark plug life can be extended by applying a spark current amplitude as low as possible without causing quenching of the flame kernel while it is traveling within an electrode gap and/or by applying spark current of a long enough duration to allow the spark/flame kernel to clear a spark plug gap. In certain embodiments, ignitability can be improved by applying a high enough spark current amplitude to sustain the flame kernel once outside the spark plug gap and/or by applying a spark current for long enough to sustain the flame kernel once outside the spark plug gap.
摘要翻译： 在某些实施例中，与常规火花点火系统相比，可以应用随时间变化的火花点火系统来提高火花塞点火性能和耐久性。 感兴趣的两个性能参数是火花塞寿命（耐久性）和火花塞点火性。 在某些实施例中，火花塞寿命可以通过尽可能低地施加火花电流振幅来延长，而不会在火焰核在电极间隙内行进时引起火焰和/或通过施加足够长的持续时间的火花电流来允许 火花/火焰内核清除火花塞间隙。 在某些实施例中，可以通过施加足够高的火花电流振幅来维持一次火花塞间隙外的火焰核和/或通过施加火花电流足够长的时间来维持火焰塞一旦在火花塞间隙之外来提高点火性。
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公开(公告)号：US10550820B2
公开(公告)日：2020-02-04
申请号：US14028516
申请日：2013-09-16
发明人： Luigi P. Tozzi , David Thomas Lepley , Maria Emmanuella Sotiropoulou , Joseph Martin Lepley , Steven B. Pirko
IPC分类号： F02P9/00 , F02P13/00 , H01T13/20 , H01T13/50 , H01T13/46 , F02D35/02 , F02B19/00 , F02B19/12
摘要： In certain embodiments, a time-varying spark current ignition system can be applied to improve spark plug ignitability performance and durability as compared to conventional spark ignition systems. Two performance parameters of interest are spark plug life (durability) and spark plug ignitability. In certain embodiments, spark plug life can be extended by applying a spark current amplitude as low as possible without causing quenching of the flame kernel while it is traveling within an electrode gap and/or by applying spark current of a long enough duration to allow the spark/flame kernel to clear a spark plug gap. In certain embodiments, ignitability can be improved by applying a high enough spark current amplitude to sustain the flame kernel once outside the spark plug gap and/or by applying a spark current for long enough to sustain the flame kernel once outside the spark plug gap.
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公开(公告)号：US20180038270A1
公开(公告)日：2018-02-08
申请号：US15784095
申请日：2017-10-14
CPC分类号： F02B19/1095 , F02B1/04 , F02B17/005 , F02B19/1009 , F02B19/1014 , F02B19/108 , F02B19/12 , F02B19/16 , F02B23/04 , F02B23/0672 , F02B23/0675 , H01T13/54 , Y02T10/125
摘要： In certain embodiments, a two-stage precombustion chamber may be used to reduce engine NOx levels, with fueled precombustion chambers, while maintaining comparable engine power output and thermal efficiency. One or more fuel admission points may be located in either the first prechamber stage or the second prechamber stage. A more efficient overall combustion characterized by low levels of NOx formation may be achieved by a two-stage precombustion chamber system while generating very high energy flame jets emerging from the second prechamber stage into the main combustion chamber. A first prechamber stage may be substantially smaller than a second prechamber stage. The volumes and aspect ratios of the two prechamber stages, along with the location of the electrodes within the first stage prechamber, the hole patterns, angles and the separate fueling, may be selected to create a distribution of fuel concentration that is substantially higher in the first stage prechamber compared to the second prechamber stage.
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公开(公告)号：US20140060479A1
公开(公告)日：2014-03-06
申请号：US14020770
申请日：2013-09-06
IPC分类号： F02B19/12
CPC分类号： F02B19/12 , F02B1/04 , F02B17/005 , F02B19/1009 , F02B19/1014 , F02B19/108 , F02B19/1095 , F02B19/16 , F02B23/04 , F02B23/0672 , F02B23/0675 , H01T13/54 , Y02T10/125
摘要： In certain embodiments, a two-stage precombustion chamber may be used to reduce engine NOx levels, with fueled precombustion chambers, while maintaining comparable engine power output and thermal efficiency. One or more fuel admission points may be located in either the first prechamber stage or the second prechamber stage. A more efficient overall combustion characterized by low levels of NOx formation may be achieved by a two-stage precombustion chamber system while generating very high energy flame jets emerging from the second prechamber stage into the main combustion chamber. A first prechamber stage may be substantially smaller than a second prechamber stage. The volumes and aspect ratios of the two prechamber stages, along with the location of the electrodes within the first stage prechamber, the holes patterns, angles and the separate fueling, may be selected to create a distribution of fuel concentration that is substantially higher in the first stage prechamber compared to the second prechamber stage.
摘要翻译： 在某些实施例中，可以使用两级预燃室来利用燃料预燃室来降低发动机NOx水平，同时保持可比较的发动机功率输出和热效率。 一个或多个燃料允许点可以位于第一预燃室阶段或第二前室阶段中。 以低水平的NOx形成为特征的更有效的总体燃烧可以通过两级预燃室系统实现，同时产生从第二预燃室进入主燃烧室的非常高能量的火焰喷射。 第一预烧室阶段可以显着地小于第二前室阶段。 可以选择两个前室阶段的体积和长宽比以及电极在第一阶段预制室内的位置，孔图案，角度和单独的加燃料，以产生燃料浓度的分布，其在 第一阶段前房与第二个前房阶段相比。
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公开(公告)号：US10138799B2
公开(公告)日：2018-11-27
申请号：US14020770
申请日：2013-09-06
IPC分类号： F02B19/12 , F02B19/10 , F02B23/04 , F02B23/06 , F02B17/00 , F02B1/04 , F02B19/16 , H01T13/54 , F02B19/00
摘要： In certain embodiments, a two-stage precombustion chamber may be used to reduce engine NOx levels, with fueled precombustion chambers, while maintaining comparable engine power output and thermal efficiency. One or more fuel admission points may be located in either the first prechamber stage or the second prechamber stage. A more efficient overall combustion characterized by low levels of NOx formation may be achieved by a two-stage precombustion chamber system while generating very high energy flame jets emerging from the second prechamber stage into the main combustion chamber. A first prechamber stage may be substantially smaller than a second prechamber stage. The volumes and aspect ratios of the two prechamber stages, along with the location of the electrodes within the first stage prechamber, the holes patterns, angles and the separate fueling, may be selected to create a distribution of fuel concentration that is substantially higher in the first stage prechamber compared to the second prechamber stage.
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公开(公告)号：US20170226922A1
公开(公告)日：2017-08-10
申请号：US15422751
申请日：2017-02-02
CPC分类号： F02B19/08 , F02B19/1004 , F02B19/1014 , F02B19/108 , F02B19/12 , F02B19/18 , F02B2043/103 , F02M21/02 , F02M21/0218 , F02M21/0248 , F02M21/0281 , Y02T10/125 , Y02T10/32
摘要： In certain embodiments, a unique method and pre-combustion chamber (PCC) structure may ensure very efficient flame propagation of lean fuel-air mixture in natural gas engines by reducing the amount of fuel admitted to the PCC. A PCC may include an enclosed volume of 1-3% of the main combustion chamber volume, with a spark plug and a fuel passage located opposite one or more PCC discharge nozzles to create a relatively richer fuel-air mixture with relatively lower turbulence in the spark plug region and a relatively leaner fuel-air mixture with relatively high turbulence in the nozzle region, which can be reliably and efficiently ignited, resulting in a high velocity flame jet/torch emerging from the prechamber into the main chamber. The PCC may be threaded with a 22 mm×1.5 or ⅞″-18 thread size, to allow the PCC to be screwed into a cylinder head in place of a spark plug.
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