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公开(公告)号：US20200240321A1
公开(公告)日：2020-07-30
申请号：US16753300
申请日：2018-09-21
申请人： Daimler AG
发明人： Dietmar BERTSCH
摘要： An internal combustion engine for a motor vehicle has at least one cylinder for accommodating a piston and at least one pre-chamber spark plug allocated to the combustion chamber of the cylinder. The engine also has a pre-chamber, fluidically connected with the combustion chamber via several openings, in which at least one ignition spark is generable by the pre-chamber spark plug. At the induction stroke of the internal combustion engine, a rinsing of the pre-chamber with inlet gas including at least fuel and air occurs, so that, at the ignition point, an ignitable mixture of fuel and air is accommodated in the pre-chamber.
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公开(公告)号：US10711708B2
公开(公告)日：2020-07-14
申请号：US16052834
申请日：2018-08-02
发明人： Kota Matsumoto , Tomonori Urushihara , Masanari Sueoka , Keiji Maruyama , Toru Miyamoto , Yudai Koshiro , Gyetae Pak
IPC分类号： F02D37/02 , F02D41/30 , F02B23/10 , F02B11/00 , F02B31/08 , F02B23/06 , F02D35/02 , F02D41/26 , F02D41/40 , F02P5/04 , F02P5/15 , F02D41/00 , F02B31/00
摘要： A control device for an engine is provided, which includes a fuel injector attached to the engine, a spark plug disposed to be oriented into a combustion chamber, a swirl control valve provided in an intake passage, and a controller connected to the fuel injector, the spark plug, and the swirl control valve and configured to control the fuel injector, the spark plug, and the swirl control valve. The swirl control valve closes in a given operating state of the engine. The fuel injector injects fuel after the swirl control valve is closed, between intake stroke and an intermediate stage of compression stroke. The fuel injector injects the fuel after the first fuel injection. The spark plug performs the ignition after the second fuel injection so that the mixture gas starts combustion by flame propagation and then unburned mixture gas self-ignites.
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公开(公告)号：US10590898B2
公开(公告)日：2020-03-17
申请号：US15630124
申请日：2017-06-22
IPC分类号： F02M61/14 , F02B1/08 , F02M69/04 , F02B23/10 , F02B1/10 , F02B5/00 , F01P3/02 , F02B17/00 , F02B75/12
摘要： Examples are directed to a fuel injection device positioned in a cylinder liner. In one example, a cylinder includes a combustion chamber which is jointly formed by a piston crown of a piston, by a cylinder barrel which laterally delimits the combustion chamber, and by a cylinder head. The cylinder includes an injection device positioned in the cylinder barrel for direct introduction of fuel into the combustion chamber, which injection device has at least one opening which, during a course of an injection process, is configured to be activated to introduce fuel into the combustion chamber, the injection device terminating flush, at a combustion chamber side, with the cylinder barrel.
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公开(公告)号：US20200018225A1
公开(公告)日：2020-01-16
申请号：US16494656
申请日：2018-02-27
摘要： 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 angle defined by an orthogonal plane orthogonal to a center axis of a cylinder and the exhaust-side inclined surface) is smaller than an angle defined by the orthogonal plane and a valve head bottom surface of an exhaust valve, and an inclination angle difference between the exhaust-side inclined surface and the valve head bottom surface of the exhaust valve is larger than an inclination angle difference between the intake-side inclined surface and a valve head bottom surface of an intake valve by 3 degrees or larger.
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公开(公告)号：US10371042B2
公开(公告)日：2019-08-06
申请号：US15450227
申请日：2017-03-06
申请人： IHI Corporation
发明人： Yutaka Masuda , Takahiro Kuge , Takayuki Yamada , Takeshi Yamada , Jun Teramoto
摘要： A uniflow scavenging two-cycle engine includes an scavenging port having a swirling guide portion that guides scavenging gas into a cylinder in a direction inclined with respect to a radial direction of the cylinder, and a center guide portion that is provided to be closer to a crank side of the cylinder than the swirling guide portion and guides the scavenging gas further toward the center side of the cylinder than the swirling guide portion. At least a part of the center guide portion faces a piston when the piston is positioned at bottom dead center during the high compression ratio mode, and the center guide portion and the piston do not face each other or an area of facing the piston is smaller than that during the high compression ratio mode when the piston is positioned at bottom dead center during the low compression ratio mode.
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公开(公告)号：US10352231B2
公开(公告)日：2019-07-16
申请号：US15504193
申请日：2015-08-13
摘要： In an upstream portion from a valve connecting surface that is formed in an opening of an intake port to a combustion chamber, an upper wall surface of the intake port continues from an upstream side end of the valve connecting surface and extends substantially straight and diagonally with respect to a ceiling surface on the intake port side. In addition, a cross-sectional shape of the portion in the intake port in a direction perpendicular to an axial direction of the intake port is a flat shape with an axis in a transverse direction being a long axis.
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公开(公告)号：US10309295B2
公开(公告)日：2019-06-04
申请号：US15512558
申请日：2014-09-29
摘要： A uniflow engine includes a cylinder having a cylinder wall, an inlet channel, an extension of a central axis of the inlet channel first intersecting the cylinder wall in a first portion of the cylinder and next intersecting the cylinder wall in a second portion of the cylinder opposite the first portion of the cylinder, an intake air gallery, the intake air gallery having a gallery wall and being in flow communication with the inlet channel, and a plurality of intake ports extending between the cylinder wall and the gallery wall, at least some of the intake ports having different areas at the cylinder wall measured perpendicular to longitudinal axes of the intake ports, and wherein an area of at least one in take port in the first portion of the cylinder is larger than an area of at least one intake port in the second portion of the cylinder.
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公开(公告)号：US10309293B2
公开(公告)日：2019-06-04
申请号：US15506971
申请日：2015-08-11
发明人： Manabu Tateno
摘要： A thermal insulation film is formed on a bottom surface of a cylinder head facing a top surface of a piston. The thermal insulation film in a region (a circumferential region) of a bottom surface of the cylinder head configuring a squish area in a circumferential edge of a cavity region is formed to be thinner than the thermal insulation film in a region (a cavity region) of the bottom surface of the cylinder head facing a cavity. The thermal insulation film in the circumferential region is polished, and surface roughness thereof is equal to or lower than 3 μm. The thermal insulation film in the cavity region is not polished, and surface roughness thereof is 3 to 8 μm on average.
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公开(公告)号：US20190145305A1
公开(公告)日：2019-05-16
申请号：US15759517
申请日：2016-07-29
发明人： Yuusuke KIHARA , Yoshihiro SUKEGAWA , Kazuhiro ORYOJI , Kenichiro OGATA , Minoru OOSUGA , Masayuki SARUWATARI
摘要： An object of the invention is to form a highly homogeneous air-fuel mixture which is not influenced by an engine rotation speed. Therefore, the invention provides a fuel injection control device including a cylinder, a first injector disposed at an upper portion of the cylinder in the axial direction and a center portion thereof in the radial direction, an intake valve disposed at an upper portion of the cylinder in the axial direction and an outer portion thereof in the radial direction in relation to the first fuel injection device, and a second injector supplying fuel from an upper portion of the cylinder in the axial direction and at least an outer portion in the radial direction in relation to the intake valve, in which a rotation speed of the engine is high, a fuel supply amount ratio of the first injector with respect to the second injector is controlled to be larger than that of a case where the rotation speed is low.
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公开(公告)号：US10280831B2
公开(公告)日：2019-05-07
申请号：US15759190
申请日：2016-09-23
发明人： Takayuki Hikita , Masahisa Yamakawa , Tomonori Urushihara , Kazuhiro Nagatsu , Tatsuya Fujikawa , Takashi Youso , Takaaki Nagano , Yuuki Kawai , Toshifumi Hayami
摘要： An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.
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