With Ignition Means Particularly Positioned Relative To Precombustion And Main Combustion Chambers Patents (Class 123/260)
  • Patent number: 11105256
    Abstract: Methods and systems are provided for a pre-chamber. In one example, a pre-chamber comprises a plurality of slots fluidly coupling it to a primary combustion chamber. The plurality of slots comprising a plurality of corresponding flaps configured to direct gases through the plurality of slots.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: August 31, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Xiaogang Zhang, Claudia Olivia Iyer, James Yi
  • Patent number: 11105255
    Abstract: The invention is provided with an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes an injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Ignition timing of the preceding ignition is set to be more retarded when fuel concentration specified by a fuel concentration specification section is low than when the fuel concentration is high.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: August 31, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Kota Matsumoto, Tomonori Urushihara, Keiji Maruyama, Masanari Sueoka, Ryohei Ono, Yuji Harada, Toru Miyamoto, Atsushi Inoue, Tatsuhiro Tokunaga, Takuya Ohura, Yusuke Kawai, Tomohiro Nishida, Keita Arai, Yodai Yamaguchi
  • Patent number: 11066979
    Abstract: Combustion cylinder (10) of an internal combustion engine, having a combustion chamber wall (20), which surrounds a combustion chamber (30), and a combustion chamber cover (40), which closes off the combustion chamber (30) on the upper side, wherein at least one inlet valve (50) for letting in a fluid is arranged on an inlet side (42) in the combustion chamber cover (40), and at least one outlet valve (60) for letting out a fluid is arranged on an outlet side (44) in the combustion chamber cover (40), wherein, furthermore, a prechamber spark plug (70) is arranged between the at least one inlet valve (50) and the at least one outlet valve (60) in the combustion chamber cover (40), which prechamber spark plug is arranged between the at least one inlet valve (50) and an injector (80) for injecting combustion fluid.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: July 20, 2021
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Andre Casal Kulzer
  • Patent number: 11060443
    Abstract: Methods and systems are provided for increasing an amount of oxygen in a pre-chamber of a cylinder prior to combustion. In one example, a method may include purging residual gases from a pre-chamber to a cylinder via a pre-chamber air injection, and reducing a flow of the oxygen from the pre-chamber to the cylinder via a cylinder fuel injection directed toward an orifice fluidically connecting the pre-chamber with the cylinder. In this way, a composition of pre-chamber gases may be adjusted during a combustion cycle of a cylinder.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: July 13, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Lyle Thomas, Ross Pursifull, Adam Nathan Banker, Mark Meinhart, David Bidner, Michael Damian Czekala
  • Patent number: 11053883
    Abstract: An apparatus comprising a cylinder for an internal combustion engine having at least one combustion chamber and a squish area disposed at or around a base of the at least one combustion chamber, wherein the at least one combustion chamber comprises a paraboloidal cavity.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: July 6, 2021
    Inventor: Richard William Condon
  • Patent number: 11002178
    Abstract: Methods and systems are provided for a pre-chamber. In one example, a pre-chamber comprises a plurality of venturi passages fluidly coupling it to a primary combustion chamber. The plurality of venturi passages may be configured to assist in drawing out residual gases from a previous combustion event during a current combustion event.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: May 11, 2021
    Assignee: Ford Global Technologies, LLC
    Inventor: Xiaogang Zhang
  • Patent number: 10975759
    Abstract: A spark plug is disclosed that includes at least one bore extending through a shell of the spark plug in order to form a passageway between an annular volume around the spark plug insulator nose and a pre-chamber volume of a pre-chamber device, thus directing a purge of exhaust gases trapped in the annular volume to a space formed by the exterior of the spark plug body and the interior of the pre-chamber device.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: April 13, 2021
    Assignee: Cummins Inc.
    Inventors: Alan C. Anderson, William Marshall Cover, Xu Han, Benjamin L. Olivas, Daniel J. O'Connor, Daniel Guillermo Gonzalez Medina, Xiao Qin, Nicholas James Welch, Andrew Guy Kitchen
  • Patent number: 10968817
    Abstract: In a spark-ignition internal combustion engine in which a protrusion including an intake-side inclined surface and an exhaust-side inclined surface is formed on a top surface of a piston, and a cavity is formed in the protrusion at a position associated with a spark plug, the intake-side inclined surface and the exhaust-side inclined surface are formed in such a way that an inclination angle of the exhaust-side inclined surface is smaller than an inclination angle of the intake-side inclined surface, and a difference in inclination angle between the intake-side inclined surface and the exhaust-side inclined surface is 4 degrees or larger.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: April 6, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Shuma Aoki, Hiroaki Muranaka, Naohiro Yamaguchi, Yoshitaka Wada
  • Patent number: 10947948
    Abstract: Methods and systems are provided for multiplexing ignition signals in an engine system based on engine operating conditions, each cylinder of the engine system including a main chamber spark plug and a pre-chamber system. In one example, a method may include multiplexing spark signals to a first spark plug and a second spark plug, the first spark plug coupled to a pre-chamber of a first cylinder and the second spark plug coupled to a main chamber of a second cylinder. In this way, one ignition coil may be used to actuate two different spark plugs coupled to separate cylinders.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 16, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Chris Paul Glugla, Michael Damian Czekala
  • Patent number: 10833485
    Abstract: A pre-chamber spark plug having a shell, an insulator disposed at least partially within the shell, a center electrode disposed at least partially within the insulator, a ground electrode forming a spark gap with the center electrode, and a pre-chamber cap connected to the shell and forming a pre-chamber. The pre-chamber cap includes two or more openings that are configured so that at least one inflowing fuel-air mixture jet is directed to a pre-chamber wall gap so as to flush out or remove gas from a previous ignition cycle. The two or more openings are angled so that a first inflowing fuel-air mixture jet of a first opening does not intersect with a second inflowing fuel air-mixture jet of a second opening.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: November 10, 2020
    Assignee: FEDERAL-MOGUL IGNITION GMBH
    Inventors: Werner Niessner, Peter Janas, Alexander Ott
  • Patent number: 10704522
    Abstract: An ignition control device includes a main ignition circuit to generate a spark discharge to a spark plug by controlling energization of a primary coil of an ignition coil for an internal combustion engine, an energy supply circuit that supplies energy based on a discharge continuation signal by controlling the energization of the primary coil during the spark discharge started by the operation of the main ignition circuit to supply a secondary current in the same direction as a main ignition continuously in a secondary coil of the ignition coil, a secondary current command circuit for outputting a command value of the secondary current based on the secondary current command signal, and an ignition control unit for setting signal values of the secondary current command signal and the discharge continuation signal.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: July 7, 2020
    Assignee: DENSO CORPORATION
    Inventors: Shunichi Takeda, Mitsunobu Niwa, Hisaharu Morita
  • Patent number: 10639777
    Abstract: The invention relates to a drive-in device, comprising a drive-in piston, guided in a cylinder, for driving a nail member into a workpiece, and a combustion chamber arranged above the drive-in piston, said combustion chamber being Tillable with a combustion gas, wherein the combustion chamber has a bottom that is adjustable along an axis, wherein the bottom has a groove that extends in the circumferential direction and has an inserted seal which bears in a radial direction against a rigid combustion-chamber wall, wherein a front surface, in the axial direction, of the seal protrudes in the direction of the axis from a terminating plane of the groove.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 5, 2020
    Assignee: HILTI AKTIENGESELLSCHAFT
    Inventors: Peter Stauss-Reiner, Norbert Heeb, Thomas Sperrfechter, Markus Woerner, Tilo Dittrich
  • Patent number: 10563569
    Abstract: A diesel combustion system including a piston, an annular impinging block, and a combustion chamber. The combustion chamber is divided by the annular impinging block into an upper chamber and a lower chamber. The annular impinging block includes a lower guide surface that is adjacent to the lower chamber and that extends from a trough line connected to the piston to a crest line. The ratios among the inner diameter of the top of the piston, the outer diameter of the top of the piston, the diameter of the trough line, and the diameter of the crest line define the shape of the combustion chamber which leads to increased rate of combustion, reduced soot emission, and increased fuel efficiency.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 18, 2020
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Wuqiang Long, Hua Tian, Jiangping Tian, Yao Fu, Jingchen Cui, Kai Sheng, Ping Yi, Kunpeng Qi, Qiang Zhang, Yicong Wang
  • Patent number: 10400696
    Abstract: A method for starting an internal combustion engine comprises the steps of: providing an internal combustion engine having at least one cylinder and a piston supported at a crankshaft for repeated reciprocal movement in the cylinder so as to define a main combustion chamber, the internal combustion engine further having an ignition device arranged in said cylinder with an igniter portion and a fuel injector which are both arranged at a pre-chamber, wherein the pre-chamber has a plurality of orifices for providing fluid communication between said pre-chamber and the main combustion chamber, injecting fuel in the pre-chamber, and igniting the injected fuel in the pre-chamber for pre-heating of the pre-chamber prior to injecting fuel in the main combustion chamber for combusting the injected fuel in the main combustion chamber.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: September 3, 2019
    Assignee: MAHLE POWERTRAIN, LLC
    Inventors: Hugh Blaxill, Michael Bunce
  • Patent number: 10202891
    Abstract: An object is to provide a precombustion-chamber gas engine in which occurrence of knocking is restricted. The precombustion-chamber gas engine includes: a cylinder; a cylinder head; a piston delimiting a main combustion chamber with the cylinder head; a precombustion-chamber cap delimiting a precombustion chamber inside thereof and including a plurality of nozzle holes through which the precombustion chamber is in communication with the main combustion chamber; an intake valve for opening and closing an intake port that opens on the cylinder head; and an exhaust valve for opening and closing an exhaust port that opens on the cylinder head. In a planar view where the cylinder head is seen from below, there are at least one intake-side nozzle hole and at least one exhaust-side nozzle hole, and a total nozzle-hole area of the at least one intake-side nozzle hole is larger than that of the at least one exhaust-side nozzle hole.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: February 12, 2019
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yuji Oda, Kengo Tanaka, Akihiro Yuuki
  • Patent number: 10180124
    Abstract: A laser igniter that avoids autoignition and soot formation within the prechamber and will minimize the formation of Nitrogen Oxides (NOx). The laser igniter has a laser spark plug with a microlaser and a prechamber integrally formed with the laser spark plug. The prechamber has six nozzle holes with three of the nozzle holes having a large diameter and three of the nozzle holes having a small diameter. The large and small nozzle holes are in a staggered arrangement.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: January 15, 2019
    Assignee: U.S. Department of Energy
    Inventors: Sreenath Gupta, Roberto Torelli
  • Patent number: 10037846
    Abstract: An ignition coil for an internal combustion engine includes an annular elastic seal which is tightly attached to a high-voltage tower and a plug installed in the high-voltage tower to be conductible with a spark plug. The elastic seal hermetically seals a gap between the high-voltage tower and the plug and also functions as a buffer to absorb stress, as exerted from the plug on a case of the ignition coil. This enables the case to be reduced in size as a whole without having to partially increase the wall thickness of the case to ensure a required degree of stiffness of the case and also results in improved degree of hermetic sealing between the plug and the high-voltage tower.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: July 31, 2018
    Assignee: DENSO CORPORATION
    Inventor: Katsunori Akimoto
  • Patent number: 9929539
    Abstract: A prechamber spark plug for igniting a fuel-air mixture in an internal combustion engine, in particular a gas engine, having a spark plug body (1) comprising a prechamber housing (2) and a cap (4) that closes the prechamber (3) at least partially, a ground electrode (10) and a central electrode (7) isolated from the ground electrode and projecting into the prechamber, is designed and developed with simple structural means in order to obtain advantageous igniting properties, the ground electrode (10) being designed for that purpose essentially as a cylindrical pin (11) that can be welded in a passage (12), preferably a bore (12), in the spark plug body (1).
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: March 27, 2018
    Assignee: DKT Verwaltungs-GmbH
    Inventors: Georg Maul, Steffen Kuhnert
  • Patent number: 9670827
    Abstract: A pre-chamber is provided. In one embodiment, the pre-chamber is part of a two-stroke combustion engine having a cylinder head with a sparkplug receptacle that has a generally frustoconical shape, and the pre-chamber is coupled to the sparkplug receptacle. The pre-chamber may include a cooling jacket with a generally frustoconical shape and a combustion chamber having an upper zone and a lower zone, which may be narrower than the upper zone.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: June 6, 2017
    Assignee: GE Oil & Gas Compression Systems, LLC
    Inventor: Jason Taliaferro
  • Patent number: 9638146
    Abstract: A gasoline direct-injection engine is provided. The engine performs compression self-ignition combustion, and includes a cylinder, an injector, intake and exhaust ports, intake and exhaust valves, and an ozone generating system for generating ozone inside the cylinder. The system includes an electrode projecting into the cylinder while being partially electrically insulated from walls of the cylinder, and a high-voltage control device for applying a controlled pulse-shaped voltage to the electrode. When the voltage is applied, electric discharge occurs between the non-insulated part of the electrode and the walls of the cylinder, and ozone is generated inside the cylinder due to an effect of the electric discharge. A combustion pattern is provided, in which a compression stroke injection is performed and mixture gas formed by the fuel injection self-ignites to combust. When the combustion pattern is applied, the high-voltage control device is operated on intake stroke or the compression stroke.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: May 2, 2017
    Assignee: Mazda Motor Corporation
    Inventors: Masahiko Fujimoto, Yuji Harada, Masatoshi Seto, Hiroyuki Yamashita
  • Patent number: 9534575
    Abstract: What is described is a method for igniting a fuel/air mixture in a combustion chamber of an engine, wherein a pencil, which is electrically insulated with respect to walls of the combustion chamber and contains a heating resistor, is electrically heated to a temperature of at least 800° C. in the combustion chamber of the engine by applying a heating voltage, and a high voltage of at least 500 V, which is different from the heating voltage, is applied to the pencil and thereby ions are generated in the combustion chamber by field emission of electrons. The invention additionally relates to an ignition system and a glow plug.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: January 3, 2017
    Assignee: BorgWarner Ludwigsburg GmbH
    Inventors: Michael Eberhardt, Martin Allgaier
  • Patent number: 9500118
    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 radial and axial flow characteristics may further include radial air-fuel ratio stratification and/or axial air-fuel ratio stratification. 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.
    Type: Grant
    Filed: November 1, 2015
    Date of Patent: November 22, 2016
    Assignee: Prometheus Applied Technologies, LLC
    Inventors: Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou
  • Patent number: 9476348
    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 radial and axial flow characteristics may further include radial air-fuel ratio stratification and/or axial air-fuel ratio stratification. 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.
    Type: Grant
    Filed: February 28, 2015
    Date of Patent: October 25, 2016
    Assignee: Prometheus Applied Technologies, LLC
    Inventors: Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou
  • Patent number: 9316144
    Abstract: A pre-chamber system for an internal combustion engine, in particular for a gas engine, includes a pre-chamber volume in which an ignitable fuel-air mixture can be fired by an ignition device which can be arranged at the pre-chamber system. The pre-chamber system has a flow transfer passage by which the pre-chamber volume can be connected to a main combustion chamber of the internal combustion engine. The pre-chamber volume includes an ignition region and a flow transfer region which is at least portion-wise delimited from the ignition region by an intermediate wall. The fuel-air mixture can be fired in the ignition region, and the flow transfer passage opens into the flow transfer region and there is provided an air feed passage. Preferably compressed air can be fed to the flow transfer region by way of the air feed passage.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: April 19, 2016
    Assignee: GE JENBACHER GMBH & CO OG
    Inventor: Friedrich Gruber
  • Patent number: 9163573
    Abstract: Methods, systems, and apparatuses are enclosed for an internal combustion engine system for industrial applications.
    Type: Grant
    Filed: September 9, 2012
    Date of Patent: October 20, 2015
    Inventor: Chris Wallake
  • Patent number: 9010292
    Abstract: A laser spark plug, in particular for an internal combustion engine of a motor vehicle, is described. A connection arrangement is provided in an end region of the laser spark plug facing the combustion chamber. The connection arrangement allow the laser spark plug to be connected to a prechamber module.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: April 21, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Werner Herden
  • Patent number: 9004042
    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 radial and axial flow characteristics may further include radial air-fuel ratio stratification and/or axial air-fuel ratio stratification. 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.
    Type: Grant
    Filed: September 1, 2012
    Date of Patent: April 14, 2015
    Assignee: Prometheus Applied Technologies, LLC
    Inventors: Luigi P Tozzi, Maria-Emmanuella Sotiropoulou
  • Publication number: 20150020764
    Abstract: An igniter system for a reciprocating piston internal combustion engine having one or more cylinders including at least one igniter per cylinder is disclosed. The igniter system can comprise: a combustion chamber connected to a main cylinder of the engine by a restricted diameter bore, wherein a lean burn fuel mixture is introduced into the combustion chamber by the normal compression stroke of the engine; a hydrogen valve that injects a hydrogen rich gas into the combustion chamber forming a mixture of hydrogen and air having a hydrogen concentration above the stoichiometric ratio for hydrogen and air in the combustion chamber; and a spark ignition source that injects hot unburned hydrogen into the main cylinder, thereby initiating ignition.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 22, 2015
    Applicant: V-GRID Energy Systems
    Inventor: Michael Cheiky
  • Patent number: 8875678
    Abstract: A system including a free-radical ignition system, including a pre-combustion chamber, an air intake coupled to the pre-combustion chamber, a fuel intake coupled to the pre-combustion chamber, an ignition source coupled to the pre-combustion chamber, a free-radical injection passage coupled to the pre-combustion chamber, and a quench system coupled to the pre-combustion chamber or the free-radical injection passage.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: November 4, 2014
    Assignee: GE Oil & Gas Compression Systems, LLC
    Inventor: Everette R. Johnson
  • Patent number: 8844491
    Abstract: A laser spark plug, e.g., for an internal combustion engine of a motor vehicle or a heavy-duty gas engine, has an antechamber for receiving an ignitable medium and a combustion chamber window which separates the antechamber from a part of the laser spark plug facing away from the combustion chamber. At least one flow-guiding element is provided in the antechamber and is situated in such a way that it deflects a fluid flow, which occurs in the antechamber and moves toward the combustion chamber window, into a radially inner direction.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: September 30, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Martin Weinrotter, Igor Orlandini, Werner Herden, Pascal Woerner, Juergen Raimann
  • Patent number: 8839762
    Abstract: Air/fuel mixture is received from a combustion chamber of the internal combustion engine into an enclosure about a flame kernel initiation gap between a first ignition body and a second ignition body. Air/fuel mixture received into the enclosure is directed into a flame kernel initiation gap. The mixture is then ignited in the flame kernel initiation gap.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: September 23, 2014
    Assignee: Woodward, Inc.
    Inventors: Domenico Chiera, Gregory James Hampson, Nolan Polley
  • Publication number: 20140261296
    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.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: Prometheus Applied Technologies, LLC
    Inventors: Maria Emmanuella Sotiropoulou, Luigi P. Tozzi
  • Publication number: 20140251259
    Abstract: Pre-chamber system for an internal combustion engine with: -a pre-chamber having a wall, -a spark plug having at least one electrode, -a gas introduction device, particularly a gas valve, -a gas channel connecting the gas introduction device to the pre-chamber via an inlet opening, -a rise channel for connecting the pre-chamber to a combustion chamber of the internal combustion engine, -a guiding device for influencing the flow of the gas in the pre-chamber, said guiding device being arranged adjacent to the inlet opening in such a manner that in operation, a volume flow of hot gas flowing into the pre-chamber via the rise channel and reaching the electrode of the spark plug is reduced by the guiding device.
    Type: Application
    Filed: May 22, 2014
    Publication date: September 11, 2014
    Applicant: GE Jenbacher GmbH & Co OG
    Inventors: Frederic DUMSER, Florian BECKER
  • Publication number: 20140224208
    Abstract: The invention relates to a method for operating at least one precombustion chamber-fired internal combustion engine, in particular a stationary gas Otto cycle engine, having a pilot chamber and a main combustion chamber associated with the precombustion chamber, wherein a gas mixture is fed to the precombustion chamber as flushing gas, wherein a synthesis gas generated in a fuel reformer and a fuel from a fuel source are fed to the flushing gas and wherein a fuel and at least one further substance stream are fed to the fuel reformer for the reforming process, wherein at least one operating parameter of the at least one internal combustion engine is monitored, wherein in accordance with a change in the at least one operating parameter the chemical composition of the flushing gas is modified by changing the mass stream of the at least one further substance stream.
    Type: Application
    Filed: April 11, 2014
    Publication date: August 14, 2014
    Applicant: GE Jenbacher GmbH & Co OG
    Inventors: Friedrich GRUBER, Guenther WALL
  • Publication number: 20140165958
    Abstract: Disclosed herein is a precombustion chamber structure for a gas engine. The precombustion chamber structure is configured to facilitate disassembly of a precombustion chamber tip, thus making maintenance, repair or inspection of the precombustion chamber easy. For this, the precombustion chamber structure includes: a body (110) having a main body (111), a water jacket (112) and a precombustion chamber tip (113); and a spark plug (120) for igniting fuel gas injected into the precombustion chamber (114) formed in the body (110). The precombustion chamber structure ignites fuel gas and supplies the ignited fuel gas into a main combustion chamber. A tool insert groove (1131) is formed in the junction between the precombustion chamber tip and the water jacket. The tool insert groove (1131) allows a tool for disassembly to be inserted into a space between the precombustion chamber tip and the water jacket.
    Type: Application
    Filed: July 19, 2012
    Publication date: June 19, 2014
    Applicant: HYUNDAI HEAVY INDUSTRIES CO., LTD.
    Inventors: Dae-Jin Lee, Kwang-Cheol Heo, Chae-Soon Lim, Jong-Suk Kim
  • Publication number: 20140144406
    Abstract: An internal combustion engine includes a pre-chamber. In another aspect, pressure within a pre-chamber is equal to or greater than pressure within a main combustion chamber at least prior to ignition in the main combustion chamber. A further aspect provides a supplemental piston creating pressure and supplying a fuel-air mixture into a pre-chamber, and a spark or glow plug has an end located within the pre-chamber for ignition of the mixture therein. In yet another aspect, internal combustion engine control software automatically controls pressure within a turbulent jet ignition pre-chamber, controls a valve-actuator to admit a fuel-air charge into the pre-chamber, and causes an ignitor to initiate combustion in the pressurized pre-chamber.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Harold Schock, Guoming Zhu, Elisa Toulson, Thomas Richard Stuecken
  • Publication number: 20140109865
    Abstract: A pre-chamber structure for a piston engine may include: a pre-chamber combustion chamber in which a mixture of fuel and air is combusted and a pre-chamber compression chamber including a sub-chamber communicating with the pre-chamber combustion chamber and having an inclined wall surface, and a main chamber extending from the sub-chamber, thereby preventing the fuel from being adsorbed and remaining in the wall surface of the pre-chamber compression chamber in a droplet state.
    Type: Application
    Filed: December 13, 2012
    Publication date: April 24, 2014
    Applicant: Hyundai Motor Company
    Inventors: Wonjun LEE, Soo Hyung WOO, Jin Kook KONG, Byong Young CHOI, Gee Wook SHIN, Young Hong KWAK, Jin Soon KIM
  • Patent number: 8701613
    Abstract: A laser ignition plug includes an antechamber into which the laser ignition plug is configured to irradiate laser radiation. The antechamber defines at least two overflow ducts that realize a fluid connection between the antechamber and a spatial region surrounding the antechamber. The at least two overflow ducts, with regard to one or more of (i) the radial spacing thereof from a longitudinal axis of the antechamber, (ii) the axial spacing thereof from an end region, which faces toward the combustion chamber, of the antechamber, and (iii) the alignment and/or geometry thereof, are arranged asymmetrically with respect to the longitudinal axis of the antechamber.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: April 22, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Werner Herden, Martin Weinrotter, Pascal Woerner, Juergen Raimann
  • Publication number: 20140102404
    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.
    Type: Application
    Filed: December 30, 2011
    Publication date: April 17, 2014
    Applicant: Prometheus Applied Technologies, LLC
    Inventors: Maria-Emmanuella Sotiropoulou, Luigi P. Tozzi
  • Publication number: 20140083391
    Abstract: A pre-chamber system for an internal combustion engine, in particular for a gas engine, comprising a pre-chamber volume in which an ignitable fuel-air mixture can be fired—in particular by an ignition device which can be arranged at the pre-chamber system—, wherein the pre-chamber system is provided with a flow transfer passage by which the pre-chamber volume can be connected to a main combustion chamber of the internal combustion engine, wherein the pre-chamber volume includes an ignition region and a flow transfer region which is at least portion-wise delimited from the ignition region by an intermediate wall, wherein the fuel-air mixture can be fired in the ignition region and the flow transfer passage opens into the flow transfer region and there is provided an air feed passage, wherein—preferably compressed—air can be fed to the flow transfer region by way of the air feed passage.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 27, 2014
    Applicant: GE Jenbacher GmbH & Co OG
    Inventor: Friedrich GRUBER
  • Publication number: 20140076274
    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.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 20, 2014
    Applicant: Prometheus Applied Technologies, LLC
    Inventors: Luigi P. Tozzi, David Thomas Lepley, Maria Emmanuella Sotiropoulou, Joseph Martin Lepley, Steven B. Pirko
  • Publication number: 20140060479
    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. A first prechamber stage may be substantially smaller than a second prechamber stage.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 6, 2014
    Inventors: Luigi P. Tozzi, Maria Emmanuella Sotiropoulou, David Thomas Lepley
  • Publication number: 20140026846
    Abstract: A system including a free-radical ignition system, including a pre-combustion chamber, an air intake coupled to the pre-combustion chamber, a fuel intake coupled to the pre-combustion chamber, an ignition source coupled to the pre-combustion chamber, a free-radical injection passage coupled to the pre-combustion chamber, and a quench system coupled to the pre-combustion chamber or the free-radical injection passage.
    Type: Application
    Filed: October 1, 2013
    Publication date: January 30, 2014
    Applicant: Cameron International Corporation
    Inventor: Everette R. Johnson
  • Patent number: 8597021
    Abstract: An apparatus and method for the creation, placement and control of an area of electrical ionization within an internal combustion engine combustion chamber or a fuel burner is disclosed. A furnace includes a fuel source, a fuel burner, a plasma nozzle and igniter assembly, and the associated housing and flue structures. The plasma nozzle and igniter assembly is arranged so that the fuel sprayed out from the nozzle into the combustion area passes through or in close proximity to the area of plasma ionization. A fuel burner equipped with this electrical ionization device has its fuel efficiency enhanced by the complete and immediate combustion of substantially all of the fuel that passes through the area of plasma ionization. Exhaust gas recirculation using this system is also disclosed.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: December 3, 2013
    Inventor: Michael E. Jayne
  • Patent number: 8584648
    Abstract: In some aspects, a spark plug includes a spark gap in an enclosure of the spark plug. The spark plug includes a passage in the interior of the enclosure. During operation of the engine, the passage directs flow through the spark gap, primarily away from a combustion chamber end of the enclosure. The passage can direct flow at a velocity of 5 meters/second or greater.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 19, 2013
    Inventors: Domenico Chiera, Gregory James Hampson
  • Patent number: 8567369
    Abstract: A system, including, a free-radical ignition system, that includes a pre-combustion chamber configured to combust a first fuel-air mixture to generate a flame, a shockwave, and free radicals, an injection passage configured to inject the free radicals driven by the shock wave from the pre-combustion chamber toward a combustion chamber, and a quench system configured to extinguish the flame in the pre-combustion chamber or the injection passage.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: October 29, 2013
    Assignee: Cameron International Corporation
    Inventor: Everette R. Johnson
  • Patent number: 8544443
    Abstract: A pre-chamber is provided. In one embodiment, the pre-chamber is part of a two-stroke combustion engine having a cylinder head with a sparkplug receptacle that has a generally frustoconical shape, and the pre-chamber is coupled to the sparkplug receptacle. The pre-chamber may include a cooling jacket with a generally frustoconical shape and a combustion chamber having an upper zone and a lower zone, which may be narrower than the upper zone.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: October 1, 2013
    Assignee: Cameron International Corporation
    Inventor: Jason Taliaferro
  • Publication number: 20130220269
    Abstract: An engine includes a pre-chamber jet igniter which injects at least one jet combustion flame into the combustion chamber from the outside of the combustion chamber in which the piston reciprocates to generate power so that the injected jet combustion flame is utilized as the source of ignition of the fuel injected into the space in the combustion chamber to drive the explosion stroke such that combustion of the combustion chamber can be maintained reliable by the use of jet combustion flames in the form of large flame kernels, fuel consumption can be remarkably improved and the generation of NOx can be remarkably reduced using rapid cold combustion which is caused by the continuously reliable combustion, and, in particular, it is possible to prevent liquefaction of the air-fuel mixture due to variations in the flow and pressure of the air-fuel mixture flowing in the combustion chamber.
    Type: Application
    Filed: July 19, 2012
    Publication date: August 29, 2013
    Applicant: Hyundai Motor Company
    Inventors: Soohyung WOO, Kiyoung Kwon, Jinkook Kong, Youngnam Kim, Jinsoon Kim
  • Publication number: 20130206101
    Abstract: A spark plug, and associated systems, for an internal combustion engine includes a central electrode that terminates at a first distal end surface defined about a central axis. The spark plug also includes at least one outer electrode that terminates at a second distal end surface. The at least one outer electrode at least partially laterally surrounds the central electrode such that the second distal end surface is radially offset relative to the central electrode and a lateral gap is defined between the central electrode and the at least one outer electrode. The spark plug include features that force or redirect movement of the flow of the fresh air-fuel mixture through the lateral gap to help to purge or move the residual exhaust gases left over from a previous combustion event out of the lateral gap.
    Type: Application
    Filed: December 7, 2012
    Publication date: August 15, 2013
    Applicant: CUMMINS IP, INC
    Inventor: Cummins IP, Inc.
  • Patent number: 8459222
    Abstract: A laser spark plug device for an internal combustion engine includes a prechamber for receiving an ignitable medium and at least one overflow channel providing a fluid connection between an internal space of the prechamber and an external space surrounding the prechamber. The at least one overflow channel is configured such that when a fluid flows through the overflow channel into the internal space of the prechamber, the result is a fluid flow having at least one eddy which rotates on an eddy axis forming an angle of more than approximately 45° with a longitudinal axis of the laser spark plug device.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: June 11, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Martin Weinrotter, Pascal Woerner, Juergen Raimann, Joerg Engelhardt