公开(公告)号：WO2014165236A2

公开(公告)日：2014-10-09

申请号：PCT/US2014/024904

申请日：2014-03-12

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC

Inventor： SOTIROPOULOU, Maria, Emmanuella ,  TOZZI, Luigi, P.

IPC: F02B19/12

CPC classification number: F02B19/18 ,  F02B19/08 ,  F02B19/1014 ,  F02B19/1019 ,  F02B19/12 ,  F02B19/16 ,  Y02T10/125

Abstract: In certain embodiments with large size prechambers and/or with prechambers that have large spark-gap electrode assemblies, a poor scavenge of the crevice volume may cause deterioration of the preignition margin, which then may limit the power rating of the engine, may cause the flow velocity field of the fuel-air mixture to be excessively uneven and may result in the deterioration of the misfire limit. One or more auxiliary scavenging ports may allow admission of fuel rich mixture to the crevice volume, thereby cooling the residual gases and preventing occurrence of preignition. More organized and powerful flow velocity fields may be obtained in the spark-gap electrode assembly region. This condition may result in a significant extension of the flammability limit and may significantly improve the combustion efficiency of the prechamber. Passive prechambers using the active scavenge concept may increase the engine power output and reduce the emission of pollutants from engine combustion.

Abstract translation: 在具有大尺寸前置室和/或具有大型火花隙电极组件的预制室的某些实施例中，缝隙体积的不良清除可能导致预引力边缘的劣化，其然后可能限制发动机的额定功率，可能导致 燃料 - 空气混合物的流动速度场过度不均匀，并且可能导致失火极限的恶化。 一个或多个辅助清除口可以允许富含燃料的混合物进入缝隙体积，从而冷却残余气体并防止预燃烧的发生。 可以在火花隙电极组件区域中获得更有组织和强大的流速场。 这种情况可能导致燃烧极限的显着延长，并且可以显着提高预燃室的燃烧效率。 使用主动清扫概念的被动前车箱可能会增加发动机功率输出，并减少发动机燃烧造成的污染物排放。

公开(公告)号：WO2012091739A2

公开(公告)日：2012-07-05

申请号：PCT/US2011/002012

申请日：2011-12-30

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC ,  SOTIROPOULOU, Maria-Emmanuella ,  TOZZI, Luigi, P.

Inventor： SOTIROPOULOU, Maria-Emmanuella ,  TOZZI, Luigi, P.

IPC: H01T13/20 ,  F02P13/00

CPC classification number: F02B19/18 ,  F02B19/08 ,  F02B19/1014 ,  F02B19/12 ,  F02P13/00 ,  Y02T10/125

Abstract: Generally, embodiments of a pre-chamber unit having a pre-combustion chamber including one or more induction ports in a configuration which achieves flow fields and flow field forces inside the pre-combustion chamber which act to direct flame growth away quenching surface of the pre-combustion chamber.

Abstract translation: 通常，具有预燃室的预燃室单元的实施例包括一个或多个导入口，该构造具有在预燃室内部实现流场和流场力的构造，其用于引导火焰生长， - 燃烧室。

公开(公告)号：WO2019018578A1

公开(公告)日：2019-01-24

申请号：PCT/US2018/042771

申请日：2018-07-18

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC

Inventor： SOTIROPOULOU, Maria-emmanuella ,  TOZZI, Luigi, P.

IPC: F02D19/08

Abstract: In certain embodiments, Lube Oil Controlled Ignition (LOCI) Engine Combustion overcomes the drawbacks of known combustion technologies. First, lubricating oil is already part of any combustion engine; hence, there is no need to carry a secondary fuel and to have to depend on an additional fuel system as in the case of dual-fuel technologies. Second, the ignition and the start of combustion rely on the controlled autoignition of the lubricating oil preventing the occurrence of abnormal combustion as experienced with the Spark Ignition technology. Third, LOCI combustion is characterized by the traveling of a premixed flame; hence, it has a controllable duration resulting in a wide engine load-speed window unlike the Homogeneous Charge Compression Ignition technology where the engine load-speed window is narrow. Adaptive Intake Valve Closure may be used to control in-cylinder compression temperature to be high enough to realize the consistent auto ignition of the lubricating oil mist.

公开(公告)号：WO2014043657A3

公开(公告)日：2014-03-20

申请号：PCT/US2013/060015

申请日：2013-09-16

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC

Inventor： TOZZI, Luigi, P. ,  LEPLEY, David, Thomas ,  SOTIROPOULOU, Maria, Emmanuella ,  LEPLEY, Joseph, Martin ,  PIRKO, Steven, B.

IPC: F02P9/00

Abstract: 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.

公开(公告)号：WO2014039915A1

公开(公告)日：2014-03-13

申请号：PCT/US2013/058635

申请日：2013-09-06

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC

Inventor： SOTIROPOULOU, Maria, Emmanuella ,  LEPLEY, David, Thomas ,  TOZZI, Luigi, P.

IPC: H01T13/20

CPC classification number: F02B19/12 ,  F02B19/1009 ,  F02B19/1014 ,  F02B19/108 ,  F02B19/1095 ,  F02B19/16 ,  H01T13/54 ,  Y02T10/125

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2013033668A1

公开(公告)日：2013-03-07

申请号：PCT/US2012/053568

申请日：2012-09-01

Applicant: PROMETHEUS APPLIED TECHNOLOGIES, LLC ,  TOZZI, Luigi, P. ,  SOTIROPOULOU, Maria-Emmanuella

Inventor： TOZZI, Luigi, P. ,  SOTIROPOULOU, Maria-Emmanuella

IPC: F02B19/08

CPC classification number: F02B19/12 ,  F02B19/08 ,  F02B19/1061 ,  F02B19/18 ,  F02M25/10 ,  F02P9/00 ,  F02P13/00 ,  H01T13/54 ,  Y02T10/125

Abstract: A prechamber spark plug may have a prechamber having a pre-determined aspect ratio and hole pattern to achieve particular combustion performance characteristics. The aspect ratio and hole pattern may induce a rotational flow of fuel-air in-filling streams inside the prechamber volume. The rotational flow of the fuel-air mixture may include both radial flow and axial flow characteristics based on the aspect ratio and hole pattern. Axial flow characteristics can include a first axial direction proximate the periphery of the rotational flow and a counter second axial direction approaching the center of the rotational flow. The rotational flow, the radial flow and the axial flow may be adjusted by alteration of the aspect ratio and hole pattern to achieve particular combustion performance characteristics in relation to a wide variety of spark gap geometries.

Abstract translation: 预燃烧器火花塞可以具有预制长宽比和孔图案的预制室，以实现特定的燃烧性能特征。 长宽比和孔图案可以引起在前房体内的燃料 - 空气填充流的旋转流动。 基于长宽比和孔图案，燃料 - 空气混合物的旋转流可以包括径向流动和轴向流动特性。 轴向流动特性可以包括靠近旋转流的周边的第一轴向方向和接近旋转流的中心的相反的第二轴向方向。 可以通过改变纵横比和孔图案来调节旋转流量，径向流动和轴向流动，以实现与各种火花隙几何形状相关的特定燃烧性能特征。