Class / Patent application number | Description | Number of patent applications / Date published |
123260000 | With ignition means particularly positioned relative to precombustion and main combustion chambers | 35 |
20090031984 | NON-EQUILIBRIUM PLASMA DISCHARGE TYPE IGNITION DEVICE - An ignition device which performs a spark ignition of a fuel mixture in a combustion chamber ( | 02-05-2009 |
20090133667 | Spark Ignition Engine - A spark ignition engine capable of operating even with a leaner air-fuel mixture to achieve stable ignition and combustion performance. An ignition plug ( | 05-28-2009 |
20100043744 | MICRO-PILOT INJECTION IGNITION TYPE GAS ENGINE - What is disclosed is a micro-pilot injection ignition type gas engine, whereby an air fuel ratio control in starting the engine is executed with enhanced precision, by means of introducing skip-firing intermittent operations which reflect the engine operation conditions, while an idling time span can be shortened or omitted. | 02-25-2010 |
20100132660 | Prechamber for a gas engine - The invention relates to a device for a prechamber unit ( | 06-03-2010 |
20100147259 | Laser ignition for gas mixtures - An ignition device for the ignition of a gas mixture in a main combustion chamber ( | 06-17-2010 |
20110100322 | DEVICE FOR IGNITING A FUEL/AIR MIXTURE - The invention relates to a device for igniting a fuel/air mixture in the combustion chamber of an internal combustion engine, comprising an electrode which is connected to a voltage source and extends into a precombustion chamber, wherein the precombustion chamber is separated at least in some regions from the combustion chamber by a wall, wherein a control device or a regulating device is provided which controls the voltage supply to the electrode such that a corona discharge is carried out in the precombustion chamber, wherein the wall has at least one opening for exchanging fluids between the combustion chamber and precombustion chamber, wherein a fluid inlet opens into the precombustion chamber. | 05-05-2011 |
20110297121 | SPARK PLUG WITH A LASER DEVICE IN A PRECHAMBER - A spark plug is described, for an internal combustion engine, having a prechamber for accommodating an ignitable medium, and having a laser device for applying laser radiation to an ignition point situated in the prechamber. The laser device has a laser-active solid body having a passive Q-switch. | 12-08-2011 |
20120060791 | LASER SPARK PLUG AND PRECHAMBER MODULE FOR SAME - A laser spark plug, in particular for an internal combustion engine of a motor vehicle, having a prechamber and a laser device for emitting laser pulses into the prechamber. The laser device and/or the prechamber is/are designed to focus the laser pulses on a focus point located in the region of an inner surface of the prechamber. | 03-15-2012 |
20120103302 | TURBULENT JET IGNITION PRE-CHAMBER COMBUSTION SYSTEM FOR SPARK IGNITION ENGINES - An ignition system for an internal combustion engine having at least one combustion chamber where the ignition system includes a housing, an ignition device, an injector, and a pre-chamber having a nozzle disposed spaced from the proximal portion of the pre-chamber. The igniter portion of the ignition device and the nozzle of the injector are operatively supported in the proximal portion of the pre-chamber and disposed flush therewith. The igniter portion ignites the fuel in pre-chamber such that partially combusted pre-chamber products are forced through orifices in the pre-chamber nozzle and extinguish, but dispersed through the combustion chamber so as to ignite the main fuel charge therein. | 05-03-2012 |
20120118262 | SPARK IGNITED RADICAL INJECTION SYSTEM - 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. | 05-17-2012 |
20120304959 | LASER SPARK PLUG - A laser spark plug having an antechamber is designed to irradiate laser radiation, which is guided and/or generated in the laser spark plug on at least two ignition points which are different from one another and are lying in the antechamber. The laser spark plug is designed to irradiate the laser radiation into the antechamber in such a way that a distance between at least one first ignition point and one second ignition point adjoining thereto is larger than a minimum distance between the first and/or the second ignition point(s) and an inner surface of the antechamber. | 12-06-2012 |
20130019837 | COMBUSTION CHAMBER FOR LARGE GAS ENGINE - Provided is a combustion chamber applied in a gas engine including: a main combustion chamber including, at a central portion of its ceiling, an auxiliary combustion chamber; and a piston. A peripheral portion of a top surface of the piston is a flat surface. A raised portion, which has a curved surface and which is a solid of revolution, is formed at a central portion of the top surface, the raised portion being joined to the flat surface of the peripheral portion via a curved surface. When the piston is positioned at a top dead center, nozzle holes of the auxiliary combustion chamber jet out flame jets to a portion at which the raised portion of the top surface of the piston and the flat surface of the peripheral portion of the top surface of the piston are joined together. | 01-24-2013 |
20130098331 | METHOD FOR OPERATING A LASER SPARK PLUG FOR A COMBUSTION ENGINE - In a method for operating a laser spark plug for a combustion engine, the laser spark plug having a precombustion chamber, within an operating cycle of the combustion engine, the laser spark plug irradiates an ignition location situated inside the precombustion chamber with a plurality of laser ignition pulses temporally offset from one another. | 04-25-2013 |
20130206101 | SPARK PLUG FOR REMOVING RESIDUAL EXHAUST GAS AND ASSOCIATED COMBUSTION CHAMBER - 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. | 08-15-2013 |
20130220269 | PRE-CHAMBER JET IGNITER AND ENGINE INCLUDING COMBUSTION CHAMBER EMPLOYING THE SAME - 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. | 08-29-2013 |
20140026846 | SPARK IGNITED RADICAL INJECTION SYSTEM - 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. | 01-30-2014 |
20140060479 | TWO-STAGE PRECOMBUSTION CHAMBER FOR LARGE BORE GAS ENGINES - 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. | 03-06-2014 |
20140076274 | Time-varying Spark Current Magnitude to Improve Spark Plug Performance and Durability - 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. | 03-20-2014 |
20140083391 | PRE-CHAMBER SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - 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. | 03-27-2014 |
20140102404 | Prechamber Ignition System - 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. | 04-17-2014 |
20140109865 | PRE-CHAMBER STRUCTURE FOR PISTON ENGINE - 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. | 04-24-2014 |
20140144406 | INTERNAL COMBUSTION ENGINE - 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. | 05-29-2014 |
20140165958 | PRECOMBUSTION CHAMBER FOR GAS ENGINE - 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 ( | 06-19-2014 |
20140251259 | PRECHAMBER SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - 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. | 09-11-2014 |
20140261296 | ACTIVE SCAVENGE PRECHAMBER - 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. | 09-18-2014 |
20150020764 | IGNITION SYSTEM FOR LOW GRADE SYNTHESIS GAS AT HIGH COMPRESSION - 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. | 01-22-2015 |
20160024995 | IGNITION DEVICE WITH PRE-COMBUSTION CHAMBER - An ignition device with a pre-combustion chamber for an internal combustion engine is disclosed. The internal combustion engine may have a plurality of cylinders. Each cylinder may define a main combustion chamber. The ignition device may have a first pre-combustion chamber part configured to at least partially accommodate a spark plug. The ignition device may also have a second pre-combustion chamber part defining at least a portion of the pre-combustion chamber. The second pre-combustion chamber part may include at least one orifice configured to be fluidly connected to the main combustion chamber. The second pre-combustion chamber part may be detachably mountable to the first pre-combustion chamber part, such that the first and second pre-combustion chamber parts are axially secured to one another and rotatable with respect to one another. | 01-28-2016 |
20160047294 | ACTIVE SCAVENGE PRECHAMBER - 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. | 02-18-2016 |
20160053668 | PRECHAMBER ASSEMBLY FOR ENGINE - A prechamber assembly for an engine is provided. The prechamber assembly includes a prechamber located upstream of a main combustion chamber and adapted to receive fuel from a fuel supply system of the engine. The prechamber includes a first portion, a taper portion, and a second portion. The prechamber assembly further includes a fuel injection member located downstream of the taper portion of the prechamber and fluidly connected to the second portion of the prechamber. The fuel injection member is inclined at an angle with respect to a central axis of the prechamber. The fuel injection member is in electric communication with a controller. The controller is configured to actuate the fuel injection member to supply the fuel into the second portion of the prechamber to provide rich mixing of the fuel with an air-fuel mixture received from the main combustion chamber during operation of the engine. | 02-25-2016 |
20160053670 | Method and apparatus for achieving high power flame jets while reducing quenching and autoignition in prechamber spark plugs for gas engines - 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. | 02-25-2016 |
20160053671 | Prechamber Ignition System - 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. | 02-25-2016 |
20160053673 | ACTIVE SCAVENGE PRECHAMBER - 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. | 02-25-2016 |
20160061095 | FUEL INJECTION SYSTEM FOR AN ENGINE - A fuel injection system for an engine is described. The fuel injection system includes a prechamber assembly mounted on a cylinder head of the engine. The prechamber assembly includes a prechamber located upstream of a combustion chamber of the engine and configured to receive air-fuel mixture. Further, the prechamber assembly includes a fuel injector to controllably supply fuel into the prechamber, where the supplied fuel mixes with the air-fuel mixture to form a homogeneous mixture of air and fuel at a predefined stoichiometric ratio. The prechamber assembly also includes a spark plug disposed at a downstream region of the prechamber, the downstream region being proximal to the combustion chamber of the engine. The fuel injection system also includes a controller operably coupled to the fuel injector, where the controller is configured to control the predefined stoichiometric ratio of air to fuel in in the prechamber. | 03-03-2016 |
20160160742 | ENGINE SYSTEM HAVING ENRICHED PRE-CHAMBER SPARK PLUG - A spark plug arrangement is disclosed for use in an engine system. The spark plug arrangement may include a body, and a cap fixedly connected to the body to form an integral pre-chamber. The cap may have at least one orifice. The spark plug arrangement may also include an electrode extending through the body and at least partially into the pre-chamber. The electrode may be configured to create a spark in the pre-chamber. The spark plug arrangement may further include a capillary tube disposed within the body and configured to inject gaseous fuel into the pre-chamber to form an air and fuel mixture to be ignited by the spark in the pre-chamber. | 06-09-2016 |
20160252045 | CYLINDER HEAD | 09-01-2016 |