Valveless Precombustion Chamber Patents (Class 123/268)
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Patent number: 11959414Abstract: Operating a gaseous fuel engine includes spark-igniting gaseous hydrogen fuel and air, and propagating combustion gases of the spark-ignited mixture outwardly from a spark gap. The propagating combustion gases are impinged upon a cone surface of a piston so as to limit a flame area of the propagating combustion gases. Additional gaseous hydrogen fuel and air is ignited in the combustion cylinder by way of the propagating combustion gases to urge a piston toward a bottom-dead-center position.Type: GrantFiled: March 23, 2022Date of Patent: April 16, 2024Assignee: Caterpillar Inc.Inventors: Eric Lee Schroeder, Andrew Joseph Loetz, Jaswinder Singh, Yongxian Gu, Jonathan William Anders, Naga Krishna Chaitanya Kavuri
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Patent number: 11319866Abstract: Systems and methods are provided for air and fuel delivery within a pre-chamber. In one example, an engine pre-combustion chamber comprises a first chamber portion centered along a first axis, and a second chamber portion joined to the first chamber portion and centered along a second axis arranged at an angle to the first axis. In this way, wall wetting may be decreased while favorable charge motion for robust ignition may be increased.Type: GrantFiled: June 2, 2021Date of Patent: May 3, 2022Assignee: Ford Global Technologies, LLCInventors: Brad VanDerWege, Claudia Iyer
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Patent number: 11174778Abstract: A precombustion chamber gas engine includes a main-chamber forming portion forming a main combustion chamber, a precombustion-chamber forming portion forming a precombustion chamber communicating with the main combustion chamber via nozzle holes, and an ignition device disposed in the precombustion chamber and having an ignition portion spaced from the main chamber central axis at a predetermined distance. In a plan view, the precombustion chamber has a near-ignition region including the ignition portion and a far-ignition region opposite to the near-ignition region separated by a borderline passing through the precombustion chamber central axis and perpendicular to a straight line passing through the precombustion chamber central axis and the ignition portion. The cross-sectional area of a specific near nozzle hole which is at least one nozzle hole in the near-ignition region is smaller than the cross-sectional area of a specific far nozzle hole which is at least one nozzle hole in the far-ignition region.Type: GrantFiled: December 5, 2017Date of Patent: November 16, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazutoshi Nomura, Shunya Sasaki, Daisuke Takemoto, Satoshi Yamada, Akihiro Yuuki
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Patent number: 10954905Abstract: A reciprocating piston-type internal combustion engine includes a cylinder head that has an inlet valve that can be supplied with combustion air from a cylinder inlet line connected to the inlet valve, comprising a pressure accumulator, out of which an additional medium that promotes the combustion in the cylinder can be supplied to the cylinder in a controlled manner, and an injection nozzle, via which fuel can be injected into the cylinder. The additional medium is a combustion air/fuel mixture according to the invention. The pressure accumulator is connected to the injection nozzle which has a nozzle needle, and the additional medium can be introduced into the cylinder in a controlled manner by means of the injection nozzle.Type: GrantFiled: January 24, 2018Date of Patent: March 23, 2021Assignee: ERWIN JUNKER GRINDING TECHNOLOGY A.S.Inventor: Erwin Junker
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Patent number: 10458312Abstract: A system for controlling enriched prechamber stoichiometry includes a prechamber ignition device, and an ignition control system that includes a sensor structured to measure an amount of at least one of CO2 or O2 in a prechamber, an engine timing sensor, a fuel quality sensor, and an electronic control unit. The electronic control unit is structured to receive signals from each of the sensors and determine an air-fuel ratio of the prechamber for comparison with a target air-fuel ratio, and produce a fuel delivery signal based on the comparison.Type: GrantFiled: July 21, 2017Date of Patent: October 29, 2019Assignee: Caterpillar Inc.Inventors: Paul Wang, David Ginter, Jaswinder Singh, Arnold Kim
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Patent number: 10378428Abstract: An internal combustion engine includes: a main combustion chamber; an intake port connected to the main combustion chamber at an intake opening; an exhaust port connected to the main combustion chamber at an exhaust opening; a sub-chamber provided between the intake opening and the exhaust opening, and connected to the main combustion chamber through a plurality of through-holes; a fuel injector injecting fuel into the sub-chamber; and a spark plug performing ignition in the sub-chamber. A tumble flow flows from a first side to a second side as seen from the sub-chamber. The through-holes include: a first through-hole formed in a first side part of a side wall of the sub-chamber; and a second through-hole different from the first through-hole. A diameter of the first through-hole is larger than that of the second through-hole.Type: GrantFiled: January 18, 2018Date of Patent: August 13, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Tomoyuki Muto
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Patent number: 10316733Abstract: A precombustion-chamber engine includes a cylinder, a cylinder head disposed on a top of the cylinder, and a piston reciprocably disposed within the cylinder. A main combustion chamber is defined between the piston and the cylinder head. The cylinder head includes a precombustion-chamber forming part which defines a precombustion chamber communicating with the main combustion chamber through a nozzle. The precombustion chamber includes a cylindrical first passage part extending upwardly from the nozzle, a second passage part extending upwardly from the first passage part and having an upwardly-increasing cross-sectional area, and a cylindrical space part which extends upwardly from the second passage part and in which a spark plug is disposed. Center O of a cross-section, orthogonal to straight line L, of the second passage part is eccentric with respect to straight line L composed of an axis of the first passage part and an extended line of the axis.Type: GrantFiled: December 9, 2016Date of Patent: June 11, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Takemoto, Akihiro Yuuki, Shunya Sasaki, Kazuo Ogura, Yuta Furukawa
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Patent number: 10060325Abstract: There is provided a cylinder head cooling apparatus of an engine capable of enhancing cooling efficiency around an auxiliary combustion chamber wall. The cylinder head cooling apparatus of an engine including a cylinder head having therein an intake port, an exhaust port, an auxiliary combustion chamber, and a cooling water jacket, in which an intake port wall, an exhaust port wall, and an auxiliary combustion chamber wall are placed in the cooling water jacket, the cooling water jacket includes a cooling water inlet and a cooling water outlet, engine cooling water flowed from the cooling water inlet into the cooling water jacket flows out from the cooling water outlet through the cooling water jacket, wherein a cooling water guide wall is provided upstream of the auxiliary combustion chamber wall in a cooling water passing path of the cooling water jacket, and the upstream cooling water guide wall is formed into a shape whose width gradually widens toward a downstream side.Type: GrantFiled: September 2, 2015Date of Patent: August 28, 2018Assignee: KUBOTA CorporationInventors: Kentaro Nagai, Hiroshi Kuwasaki, Tadashi Nakano, Takahito Hamasaki, Yoshinori Tanaka, Masaya Mori
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Patent number: 9915190Abstract: A ducted combustion system is disclosed. The ducted combustion system may include a combustion chamber, which is defined as an enclosure bound at a first end by a flame deck surface of a cylinder head of an internal combustion engine and bound at a second end by a piston top surface of a piston disposed within the internal combustion engine. The system may further include a fuel injector, having at least one orifice, injecting fuel into the combustion chamber as at least one fuel jet. The system may further include at least one Venturi duct disposed within the combustion chamber between the flame deck surface and the piston top surface, the at least one Venturi duct being disposed such that each of the at least one fuel jet, at least partially, enters the at least one Venturi duct structure upon being injected into the combustion chamber.Type: GrantFiled: July 13, 2015Date of Patent: March 13, 2018Assignee: Caterpillar, Inc.Inventor: Chad Koci
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Patent number: 9677459Abstract: An engine is provided. In one embodiment, the engine includes a precombustion chamber having a body, a secondary combustion chamber disposed at least partially in the body, and a plurality of passages configured to place the precombustion chamber in fluid communication with a main combustion chamber.Type: GrantFiled: August 24, 2013Date of Patent: June 13, 2017Assignee: GE Oil & Gas Compression Systems, LLCInventors: Gene McClendon, Randall A. Coleman
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Patent number: 9243530Abstract: An object of the invention is to provide a fuel injection technique suitable for a spark-ignition internal combustion engine equipped with a first fuel injection valve for injecting fuel into a cylinder, a second fuel injection valve for injecting fuel into an intake passage, and a particulate filter provided in an exhaust passage thereof. To achieve the object, the fuel injection system of an internal combustion engine according to the invention reduces an in-cylinder injection ratio, which is the ratio of the quantity of fuel injected through the first fuel injection valve to the quantity of fuel injected through the second fuel injection valve, when the quantity of particulate matter trapped in the particulate filter is larger than a threshold value, thereby reducing the quantity of particulate matter discharged from the internal combustion engine.Type: GrantFiled: December 2, 2011Date of Patent: January 26, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yasuyuki Irisawa
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Patent number: 9181851Abstract: An engine system is disclosed. The engine system may have an engine block at least partially defining a cylinder bore, and a cylinder liner disposed within the cylinder bore. The engine system may also include a fuel injector configured to pass radially through the cylinder bore and threadingly engage the cylinder liner.Type: GrantFiled: May 15, 2014Date of Patent: November 10, 2015Assignee: Electro-Motive Diesel, Inc.Inventors: Deep Bandyopadhyay, Michael B. Goetzke
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Patent number: 8844491Abstract: 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: GrantFiled: September 27, 2010Date of Patent: September 30, 2014Assignee: Robert Bosch GmbHInventors: Martin Weinrotter, Igor Orlandini, Werner Herden, Pascal Woerner, Juergen Raimann
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Patent number: 8726878Abstract: An internal combustion engine includes a cylinder head having a cylinder head base, a cylinder wall, and a piston which is movable along a cylinder axis and has a piston crown. A main combustion chamber is formed between the cylinder head base, the cylinder wall, and the piston crown. A precombustion chamber is inserted into a bore of the cylinder head and is fixed relative to the bore in the circumferential direction of the bore. The axis of the bore is at least substantially parallel to the cylinder axis, and a precombustion-type combustion chamber is formed in the precombustion chamber. At least one ring of transfer openings connects the precombustion-type combustion chamber to the main combustion chamber, and in each case, the angle which the transfer opening encloses with the cylinder axis differs for at least two transfer openings of the at least one ring.Type: GrantFiled: June 18, 2013Date of Patent: May 20, 2014Assignee: GE Jenbacher GmbH & Co OGInventor: Martin Klinkner
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Patent number: 8109362Abstract: A passive noise attenuation device and system is provided having a reticulated open-cell porous structure configured to acts as a passive control device in order to mitigate combustion noise and instability problems in combustion systems. A porous inert media structure is placed downstream of the reaction zone of a combustion chamber to dissipate noise and/or instability generated upstream in the flame. The porous inert media also limits and/or disintegrates vortical structures in the flame to produce a homogeneous flow field to facilitate distributed reaction zones.Type: GrantFiled: May 19, 2009Date of Patent: February 7, 2012Assignee: The Board of Trustees of The University of AlabamaInventors: Ajay K. Agrawal, Sadasivuni Vijaykant
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Publication number: 20090183710Abstract: The Process Chamber Motor PKM is a combustion piston engine comprising a Process Chamber as a novel type of prechamber, into which fluid fuel continually flows and is processed therein over a plurality of cycles to form a PKM-combustible-material. Above the Compression Chamber—separated by an impermeable Separating Wall—lies a Process Chamber PK, into which fuel is pushed over a long period (gear pump), therein vaporizing and therein being processed with added oxygen-overstoichiometric gas to form combustible material: gas, possibly with smoke and soot. The PK contains combustible material for at least two cycles, sustained at a pressure near the maximum attained above the piston and sustained at Process-temperature (e.g. 800° C.). The portion of combustible material to be combusted in the respective cycle streams—via a valve (e.g. pneumatically-actuated Cylinder-Valve) which is opened in the culmination zone—into the Combustion Chamber.Type: ApplicationFiled: July 20, 2006Publication date: July 23, 2009Applicant: Alfons LemmInventor: Bernard Philberth
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Patent number: 7370626Abstract: The invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible. The invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible.Type: GrantFiled: May 10, 2005Date of Patent: May 13, 2008Inventor: Gottfried Schubert
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Patent number: 7104246Abstract: A multi-part module including a flame cone and a connector adapted to be interposed between the normal spark plug port in an internal combustion engine block and a spark plug suitable for use with the engine in question. In the method, a quantity of fuel/air mixture is captured in a chamber which also houses the electrode of a spark plug. Upon generation of a spark from the spark plug, this quantity of fuel/air mixture ignites, generating a flame which propagates through one or more channels in a flame cone interposed between the spark plug and the cylinder of the engine and exits into the cylinder through multiple directionally oriented ports, whereupon the flame fronts rapidly ignite substantially all the fuel/air mixture held within the cylinder.Type: GrantFiled: April 7, 2005Date of Patent: September 12, 2006Assignee: Smart Plug, Inc.Inventors: Howard Gagliano, Marion M. Satterfield
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Patent number: 7100567Abstract: A method of operating an internal combustion engine is provided. The engine includes a main combustion chamber in fluid communication with a prechamber. The method comprises the step of varying the volume within the prechamber during a portion of a compression stroke of the main combustion chamber.Type: GrantFiled: March 30, 2005Date of Patent: September 5, 2006Assignee: Caterpillar Inc.Inventors: Brett Bailey, Scott Fiveland, Weidong Gong
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Patent number: 7066137Abstract: A flame ejector device for mounting in the spark plug aperture of an internal combustion engine whereby an inner end of the device is within the combustion chamber, the device being configured to receive a fuel-air mixture charge on the compression stroke of the piston and wherein the charge is ignited by a conventional spark plug mounted on the device, a unique arrangement and orientation of flame ejector nozzles on the inner end of the device for ejecting flame fronts toward predetermined areas within the combustion chamber to maximize fuel burning, to avoid engine knocking, and to prevent direct impingement of flame on metal portions contiguous the chamber which are susceptible to burning or heat damage.Type: GrantFiled: November 3, 2004Date of Patent: June 27, 2006Inventor: Ralph E. Dawson
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Patent number: 6662763Abstract: A reversible heat, constant pressure 2-cycle engine that takes ambient air and heats it up before mixing it with fuel, so that even a very lean mixture of air and fuel is highly combustible, to provide increased fuel economy and decreased fuel consumption when compared to conventional 4-stroke engines. Once a power stroke occurs with the very lean mixture, exhausted hot gases are directed to a turbine wheel. After work is taken from the hot gases and they are no longer combustible, they are returned to the atmosphere at ambient temperature. Also, the two-cycle present invention engine has a power stroke every revolution, instead of every other revolution as in conventional 4-stroke engines, which allows the present invention to be smaller in size while producing twice the power of conventional 4-stroke engines. No valve springs, camshafts, high-pressure fuel pumps, radiators, distributors, or mufflers are required with the present invention engine.Type: GrantFiled: April 2, 2002Date of Patent: December 16, 2003Inventor: Samuel Barran Tafoya
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Patent number: 6443118Abstract: A portable, combustion-engined tool including a combustion chamber (1) in which a fuel gas in combusted upon ignition for building up pressure in the combustion chamber for driving the tool piston (8), an ignition device (20) for igniting the fuel gas in the combustion chamber (1), and gas drain means (43) provided in the combustion chamber (1) for controlling a pressure build-up therein.Type: GrantFiled: December 19, 2000Date of Patent: September 3, 2002Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6161516Abstract: Process for ensuring the mixing of a predetermined quantity of liquid or gaseous fuel with the air that is contained in a pre-chamber with one end that is open toward cylinders of an alternative internal-combustion engine, as well as the ignition of the mixture with the fuel being injected axially from closed end of the pre-chamber by an injector that is actuated by a predefined surplus of pressure compared to that which is present in the pre-chamber itself, the injection is a accomplished during the terminal phase of the compression half-cycle, whereby the injector and surplus are such as to ensure the fuel jet which is injected is completely evaporated and/or mixed with the air that is contained in the pre-chamber at the moment when it reaches the open end of the pre-chamber and which, during its translation motion, mixes with the above-mentioned air according to mixture richness values that can be represented by a predetermined curve that rises from injection point (A) towards center (C) of the open-end ofType: GrantFiled: April 29, 1999Date of Patent: December 19, 2000Inventor: Pier Andrea Rigazzi
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Patent number: 6125813Abstract: A fuel injection, ignition, and combustion system for use in a rotary internal combustion engine of the diesel type and method of power extraction is provided. The fuel combustion system includes a rotary engine with a prechamber disposed in a top center position of the engine housing. The prechamber includes means within the prechamber for maintaining a surface in the prechamber at a temperature sufficient to cause ignition of the fuel. In operation, unthrottled air is introduced into the housing and compressed in the top center position of the engine housing. Fuel is introduced into the prechamber via a fuel injector disposed within the prechamber which ignites due to the hot surface and initiates combustion. The engine continues to operate by retaining the surface of the prechamber at a high temperature which initiates subsequent combustion cycles.Type: GrantFiled: June 9, 1997Date of Patent: October 3, 2000Assignee: Patrick Power Products, Inc.Inventors: Leonard J. Louthan, Michael J. Griffith
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Patent number: 6119650Abstract: An energy conservation cycle engine which protects environmental pollution by reducing NOx gases, unburned materials and increases the specific output power per weight by reducing friction-loss and vibration, by reducing the wall thickness of the main combustion chamber, and by raising the maximum combustion pressure thereby reducing CO.sub.2 in the exhaust gas. A piston has a cup-like recess at its top and a small diameter piston protrudes therefrom. A cylinder head conforms with the shape of the piston to accept the protruded portion so as to form two combustion chambers, a main chamber and a sub-chamber, and the lower end of the sub-chamber is tapered to accelerate the movement of the combustion gas between the two chambers.Type: GrantFiled: November 23, 1998Date of Patent: September 19, 2000Inventors: Hiroyasu Tanigawa, Kazunaga Tanigawa
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Patent number: 5934244Abstract: A combustion prechamber is formed by at least two components. An upper component for accommodating an injection device, for example, and a lower component for sealing the prechamber off from the main combustion chamber. To configure such a combustion pre-chamber such that, without impairing the combustion process and the service life, instead of being welded, the connecting seam between the upper component and the lower component is notch-free and, at the same time, has a high strength, and is produced by a brazing process.Type: GrantFiled: January 30, 1998Date of Patent: August 10, 1999Assignee: Man B&W Diesel AktiengesellschaftInventors: Manfred Walenta, Kai Rieck
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Patent number: 5237972Abstract: A two-stroke cycle spark ignition engine having cylinder fuel injection is provided with a combustion chamber featuring a delta shaped bowl or cavity that is configured and positioned in the cylinder head to improve scavenging of the combustion chamber near the injector while maintaining adequate squish flow for improved charge mixing and combustion.Type: GrantFiled: November 27, 1992Date of Patent: August 24, 1993Assignee: General Motors CorporationInventors: Edward G. Groff, Keith Meintjes, Ramachandra Diwakar
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Patent number: 5222993Abstract: A water-cooled, spark-ignited, natural gas burning engine that includes an improved ignition system having a pair of precombustion chambers located in series connected by an orifice from the first chamber into the combustion chamber of the engine whereby a relatively rich fuel/air mixture, ignited in the second prechamber, propagates a flame through an orifice into the first chamber wherein a leaner fuel/air mixture from the combustion chamber is plasma ignited which in turn creates a larger flame that is projected through an orifice into the main combustion chamber for plasma igniting a lean fuel/air mixture which could not otherwise be ignited by spark ignition. The invention also contemplates a kit providing the above for use in converting water-cooled, diesel burning, compression ignited engines into water-cooled, natural gas burning, spark-ignited engines.Type: GrantFiled: September 28, 1992Date of Patent: June 29, 1993Assignee: Gas Research InstituteInventor: Michael E. Crane
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Patent number: 5111786Abstract: An internal combustion engine having an air cell combustion system includes a cylinder block having at least one bore with a piston reciprocably housed therein, and a cylinder head attached to a cylinder block, with the cylinder block, piston and cylinder head defining a combustion chamber. A reservoir for air compressed by the piston is delimited by a counterbore in the deck surface of the cylinder block and by an annular space formed in the cylinder head. A number of passages extend tangentially from the reservoir into the combustion chamber.Type: GrantFiled: May 3, 1991Date of Patent: May 12, 1992Assignee: Ford Motor CompanyInventors: Dominic Fontichiaro, Daniel M. Kabat
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Patent number: 4926818Abstract: A method and device for generating pulsed jets which will form plumes comprising eddie structures, which will entrain a fuel/air mixture from the head space of an internal combustion engine, and mixing this fuel/air mixture with a pre-ignited fuel/air mixture of the plumes thereby causing combustion of the reactants to occur within the interior of the eddie structures.Type: GrantFiled: February 24, 1989Date of Patent: May 22, 1990Assignee: The Regents of the University of CaliforniaInventors: A. K. Oppenheim, H. E. Stewart, K. Hom
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Patent number: 4696269Abstract: A flame ignitor for internal combustion engines. This flame ignitor is, in one embodiment, an insert unit to be received in, for example, a conventional spark plug hole of an engine. It is to project into the combustion chamber of the engine a sufficient distance, and at a selected orientation, such that an opening will collect a portion of fuel-rich fuel-air mixture from within the combustion chamber and direct the same toward a spark gap of a spark producing device located in the opposite end of the unit. The device has an elongated secondary chamber proximate the combustion chamber and a primary chamber proximate the spark gap. The opening into the secondary chamber also provides an outlet from the secondary chamber to direct ignited fuel into the engine combustion chamber above the piston head at a high rate of speed to ignite any fuel-air mixture therein prior to the initiation of combustion knock.Type: GrantFiled: January 23, 1987Date of Patent: September 29, 1987Assignee: Oak Ridge Systems, Inc.Inventor: Donald Blackburn
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Patent number: 4646695Abstract: A flame ignitor for internal combustion engines. This flame ignitor is, in one embodiment, an insert unit to be received in, for example, a conventional spark plug hole of an engine. It is to project into the combustion chamber of the engine a sufficient distance, and at a selected orientation, such that a bell-shaped opening will collect a portion of fuel-rich fuel-air mixture from within the combustion chamber and direct the same toward a spark gap of a spark producing device located in the opposite end of the unit. The device has an elongated secondary chamber proximate the combustion chamber and a primary chamber proximate the spark gap. The bell-shaped opening into the secondary chamber is preferably oriented to give a spiral movement to incoming fuel mixtures.Type: GrantFiled: December 9, 1985Date of Patent: March 3, 1987Assignee: Oak Ridge Systems, Inc.Inventor: Donald Blackburn
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Patent number: 4596214Abstract: A combustion chamber system of a kerosine internal combustion engine including a main combustion chamber and an auxiliary combustion chamber both of which are defined in a cylinder head and are spaced from each other by a partition. A plurality of communication holes through which these main and auxiliary combustion chambers communicate with each other are made in the partition. The main combustion chamber has a suction port and an exhaust port opened thereto which are adapted to be opened and closed by a suction valve and an exhaust valve, respectively. The open ends of the communication holes on the side of the main combustion chamber are pointed to the upper surface of a piston located in the vicinity of a top dead center thereof, and a mixture of a theoretical or richer fuel ratio is fed into the main combustion chamber.Type: GrantFiled: January 18, 1985Date of Patent: June 24, 1986Assignee: Honda Giken Kabushiki KaishaInventors: Shizuo Yagi, Junji Ootani, Masafumi Araki, Fumihiko Yoshida
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Patent number: 4465033Abstract: An energy conversion cycle for an internal combustion engine and an internal combustion engine capable of carrying out the process to produce work, the process characterized by the steps of forming fuel and air charges having fuel to air proportions varying from stoichiometric at full engine power to excess air at less than full engine power conditions; increasing by compression the density and activation of the molecules of the charges supplied to a variable volume working chamber in which fuel and oxygen in the air are reacted to produce thermal potential; controlling fuel and air distribution in the working chamber so that the excess air portion of each charge is located in an air reservoir chamber that is separated from the reaction area by an open partition area separating the working and air reservoir chambers; and through the partition area, controlling availability of oxygen in the working chamber during the reaction while permitting the oxygen to be activated in a specific manner by molecular interacType: GrantFiled: October 25, 1978Date of Patent: August 14, 1984Inventor: Richard F. Blaser
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Patent number: 4444166Abstract: A method and apparatus for combusting diesel, gasoline, kerosene, alcohol and other compression ignition fuels in either direct or indirect injection compression auto ignition internal combustion engines which enables such engines to operate at low compressions. The apparatus includes an ignition chamber which functions to receive a portion of the incoming fuel charge thereby concentrating such portion in an area separate from the auxiliary or primary combustion chambers.Type: GrantFiled: March 4, 1983Date of Patent: April 24, 1984Assignee: Kovacs Research Center, Inc.Inventors: Geza Kovacs, Mihaly Kovacs, Endre Kovacs, Peter Kovacs
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Patent number: 4433647Abstract: In accordance with the teachings of the present invention an internal combustion engine comprising at least a combustion chamber, a piston, a turbulence chamber provided inside the overhead cylinder above the piston, and an ignition device leading to the turbulence chamber is provided. The invention is characterized in that at least one channel provided at the base of the overhead cylinder, opens tangentially along the walls of the turbulence chamber. The channel has, at its origin, a width substantially equal to the diameter of the seat of the intake valve and narrows as it goes deeper in the direction of the turbulence chamber. This engine embodies an improvement of the Otto type engines.Type: GrantFiled: August 6, 1981Date of Patent: February 28, 1984Inventor: Rudolf Muller
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Patent number: 4416228Abstract: An ignition chamber unit to be arranged on a main combustion chamber of an internal combustion engine has walls forming a separate ignition chamber having a first wall which separates the ignition chamber from the main combustion chamber and has at least one passage arranged in the first wall to connect the ignition chamber with the combustion chamber, a center electrode provided in the ignition chamber and forming together with the first wall a spark gap and also having a free end which extends into the ignition chamber, wherein the electrode is hollow near the free end and is formed as a heat pipe, and an insulator with an insulator shoe which extends into the ignition chamber and supports the center electrode so that the insulator together with the insulator shoe forms an insulating gap.Type: GrantFiled: January 7, 1982Date of Patent: November 22, 1983Assignee: Robert Bosch GmbHInventors: Walter Benedikt, Reinhard Latsch, Hans Schlembach