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公开(公告)号：US12098669B2
公开(公告)日：2024-09-24
申请号：US18020269
申请日：2021-05-21
申请人： YAMABIKO CORPORATION
发明人： Kuniyoshi Eto , Shirou Yamaguchi , Takuo Yoshizaki
CPC分类号： F02B19/12 , F02B25/16 , F02B33/04 , F02B2710/036
摘要： A two-stroke engine according to the present invention includes: a separating wall which confines a tip end portion of an ignition device; an ignition promoting chamber which is formed by means of the separating wall, is independent of a combustion chamber, and encloses the tip end portion of the ignition device; and a plurality of communicating holes which are provided in the separating wall, each of which is provided with a first opening that opens in the combustion chamber and a second opening that opens in the ignition promoting chamber, and which provide communication between the combustion chamber and the ignition promoting chamber.
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公开(公告)号：US12049843B2
公开(公告)日：2024-07-30
申请号：US17910795
申请日：2021-03-16
申请人： AVL LIST GMBH
发明人： Martin Klampfer , Andreas Zurk
摘要： The invention relates to a cylinder head (1) with at least one recess (23) for arranging at least one gas valve (20) and at least one spark plug (15). The spark plug (15) reaches into a pre-chamber (17) and is arranged along a spark plug rotational axis (16), and the gas valve (20) is arranged along a gas valve rotational axis (19), wherein the gas valve rotational axis (19) is inclined relative to the spark plug rotational axis (16), and the distance (A) between the gas valve rotational axis (19) and the spark plug rotational axis (16) decreases as the distance to the pre-chamber (17) increases in a direction facing away from the combustion chamber (2). The aim of the invention is to provide an improved cylinder head (1) which allows an improved assembly and requires less installation space. According to the invention, this is achieved by the aforementioned cylinder head (1) in that the recess (23) for the spark plug (15) and the gas valve (20) has a surface (0) which is formed by a primary molding process, preferably a casting process, and is post-processed particularly preferably without machining.
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公开(公告)号：US12025047B2
公开(公告)日：2024-07-02
申请号：US18019779
申请日：2020-08-07
发明人： Frederic Bussieres
摘要： A flow guiding device for an internal combustion engine includes a main body substantially in the shape of a surface shell of a truncated cone and/or a cylinder and a plurality of orifices in the main body. The main body is adapted to be mounted between a cylinder head body and an ignition assembly of the internal combustion engine, and wherein the orifices are adapted to guide a cooling medium between an outside volume and an inside volume of the truncated cone or cylinder.
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4.发明授权公开(公告)号：US12021354B2
公开(公告)日：2024-06-25
申请号：US18265769
申请日：2021-11-30
发明人： Hans-Bernhard Snuis
摘要： An internal combustion engine is fitted with a pre-combustion chamber having first and second electrodes, each electrode extending through a respective electrode aperture located in a thermally conductive body portion of the pre-combustion chamber body which is located within the cylinder head or other engine body component outside the combustion chamber. The second electrode may be a ground electrode and is adjustable along an axis of the respective, second electrode aperture to adjust the spark gap.
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公开(公告)号：US12000329B2
公开(公告)日：2024-06-04
申请号：US17414252
申请日：2019-12-17
发明人： Joerg Ross , Simone Malaguti , Ian Whelan , Davide Carpentiero , Mattia Lugli , Luke Scott
CPC分类号： F02B19/1061 , F02B19/12 , F02B19/16
摘要： The present disclosure relates to assemblies for engines such as pre-combustion chamber assemblies for spark ignition engines. It is known to provide a spark ignition engine with a pre-combustion chamber but it can be difficult to provide a system with good knock performance at high speed with high loads while still having reliable ignition at low speed with low load. In particular, at low speed with low load, there may be a relatively high percentage of exhaust gas residuals (EGR) in a pre-combustion chamber which can prevent ignition especially when the ignition timing is retarded during catalyst heating. Aspects of the disclosure aim to alleviate at least to a certain extent the problems of the prior art. According to a first aspect there is provided a pre-combustion chamber assembly for a spark ignition engine, the assembly having: an ignition chamber adapted to contain at least one electrode of a spark generator; the ignition chamber being adapted to communicate with a main engine combustion chamber via at least one pre-chamber port; wherein the ignition chamber communicates for removal therefrom of exhaust gas residuals. The exhaust gas residuals are preferably removed to a distinct storage chamber, more preferably via a transfer port.
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6.发明授权公开(公告)号：US11994057B1
公开(公告)日：2024-05-28
申请号：US18358766
申请日：2023-07-25
发明人： Anqi Zhang
CPC分类号： F02B19/06 , F02B19/12 , F02B19/18 , F02B2075/027
摘要： An engine system includes a prechamber in fluid communication with a main chamber of an engine cylinder via a plurality of nozzles located along a first end of the prechamber. The engine system also includes a prechamber ignition device interfacing an interior of the prechamber, and a prechamber piston slidably disposed in the interior of the prechamber between the first end and a second end of the prechamber, wherein a variable volume is defined in the interior of the prechamber between the prechamber piston and the first end of the prechamber. The engine system further includes a spring positioned between the second end of the prechamber and the prechamber piston, wherein the spring is configured to exert a spring force on the prechamber piston.
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公开(公告)号：US20240110530A1
公开(公告)日：2024-04-04
申请号：US18370232
申请日：2023-09-19
申请人： SUBARU CORPORATION
发明人： Shinji WAKAMOTO
CPC分类号： F02D41/068 , F02B19/12 , F02B19/18 , F02D41/401 , F02M23/10 , F02P5/1504 , F02D2041/389
摘要： An engine is configured to ignite an air-fuel mixture with an electric spark to ignite an air-fuel mixture. The engine includes: a cylinder head including a chamber partition wall having through holes and defining a main combustion chamber and a sub-combustion chamber; a fuel injector that injects fuel into the main combustion chamber; an air injector that injects air into the sub-combustion chamber; an ignition device causes an electric discharge between an ignition electrode and the chamber partition wall; and a control system that controls the fuel and air injectors, and the ignition device. At a compression stroke during a warm-up operation, the fuel is injected throughout a first period, and the air is injected throughout a second period at least partially overlapping the first period. At a power stroke during the warm-up operation, the electric discharge is caused after the fuel is injected.
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公开(公告)号：US11879378B2
公开(公告)日：2024-01-23
申请号：US17793663
申请日：2021-04-07
发明人： Clino D'Epiro
CPC分类号： F02B19/12 , F02B25/02 , F02M21/0209 , F02M21/0275
摘要： An internal combustion engine with controlled ignition comprises a cylinder, a relative piston, and a head between which a combustion chamber is operationally defined. The cylinder and the piston define a first prismatic coupling. The engine also comprises a pre-chamber made directly inside the combustion chamber, and a male element stably connected to an upper surface of the piston to penetrate the pre-chamber at least in one portion of the relative motion of the piston in the cylinder. A spark plug is arranged to look out into the pre-chamber.
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公开(公告)号：US20230406283A1
公开(公告)日：2023-12-21
申请号：US18028168
申请日：2021-09-29
摘要： The present disclosure is directed to operation of a motor vehicle including a first motor configured as an internal combustion engine and a second motor configured as an electric motor. The first motor comprises a combustion chamber, an ignition source and a prechamber that is coupled fluidically to the combustion chamber and into which a portion of the ignition source is introduced. The first motor can be operated by ignition of a fuel/air mixture in the prechamber interior by the ignition source. By way of a control device, the first motor is activated in a manner dependent on a load requirement, and is operated by ignition of the fuel/air mixture in the prechamber interior by the at least one ignition source only when it is operated exclusively in a stable combustion state as a result.
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10.发明授权公开(公告)号：US11846227B2
公开(公告)日：2023-12-19
申请号：US17907925
申请日：2021-02-11
发明人： Werner Holly
CPC分类号： F02B19/12 , F02B19/1014 , F02B19/1023
摘要： A pre-chamber spark plug for a combustion chamber of a combustion engine includes a pre-chamber which has a plurality of openings and an electrode device which is disposed in the pre-chamber. An ignition spark for igniting a fuel-air mixture introduced into the pre-chamber is generatable at a spark location in the pre-chamber by the electrode device. The pre-chamber spark plug is configured to bring about a tumble-shaped flow of fuel-air mixture flowing into the pre-chamber via the plurality of openings. The tumble-shaped flow has, in a first region of the pre-chamber, a first flow part pointing upward away from the plurality of openings, and, in a second region of the pre-chamber, a second flow part adjoining the first flow part and pointing downward in a direction of the plurality of openings. The spark location is disposed at least in part in the second region.
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