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公开(公告)号：US20180230896A1
公开(公告)日：2018-08-16
申请号：US15513799
申请日：2015-11-05
CPC分类号： F02B23/10 , F02B1/04 , F02B2023/102 , F02B2275/02 , Y02T10/125
摘要： A fuel injection valve is shifted, with respect to the bore center of a cylinder, toward one end of an engine's output shaft. A top surface of a piston has inclined surfaces, and is raised by the inclined surfaces. A cavity is formed by hollowing out portions of the inclined surfaces, and faces the injection axis of the fuel injection valve. In a vertical cross section taken along the plane passing through a particular location in an intake other-side region of a combustion chamber and the location of the fuel injection valve, the distance from an injection tip of the fuel injection valve to the wall surface of the cavity at the particular location is longer than that from the injection tip to the wall surface at a diametrically opposed location to the particular location.
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公开(公告)号：US20180066599A1
公开(公告)日：2018-03-08
申请号：US15686426
申请日：2017-08-25
CPC分类号： F02D41/3094 , F02B43/10 , F02B47/02 , F02D13/0265 , F02D41/0025 , F02D41/345 , F02D41/401 , F02D2041/389 , F02M25/0227 , F02M25/03 , Y02T10/18 , Y02T10/32 , Y02T10/44
摘要： A direct injection engine includes a fuel injection valve configured to inject fuel into a cylinder, a water injection valve configured to inject water into the cylinder, and a valve variable mechanism configured to change an operation timing of each of an intake valve and an exhaust valve. During an operation in a low load range, a negative overlap period when both of the intake valve and the exhaust valve are closed across an exhaust top dead center is formed by the valve variable mechanism, and fuel is injected from the fuel injection valve and water is injected from the water injection valve respectively during the negative overlap period. This causes a steam reforming reaction such that at least a part of injected fuel and injected water turns to hydrogen and carbon monoxide within the cylinder during the negative overlap period.
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公开(公告)号：US20180058383A1
公开(公告)日：2018-03-01
申请号：US15686405
申请日：2017-08-25
IPC分类号： F02M25/022 , F02M25/03 , F02B47/02 , F02B9/02
CPC分类号： F02M25/0227 , F02B9/02 , F02B47/02 , F02M25/03 , Y02T10/121
摘要： A homogeneous charge compression ignition engine includes a cylinder configured to accommodate a piston to be reciprocally movable, a fuel injection valve configured to inject fuel into the cylinder, a water injection valve configured to inject water into the cylinder, a fuel injection control module configured to inject fuel from the fuel injection valve into the cylinder at such a timing that a mixture of fuel and air is self-ignited in a latter stage of a compression stroke or in an initial stage of an expansion stroke, and a water injection control module configured to perform at least a basic water injection of injecting water from the water injection valve into the cylinder during a predetermined period, which starts concurrently with or after start of combustion by the self-ignition and which overlaps a combustion period.
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公开(公告)号：US20170356330A1
公开(公告)日：2017-12-14
申请号：US15538403
申请日：2015-12-25
发明人： Kazuaki NARAHARA , Noriyuki OTA , Yoshihisa NOU , Akira KAGEYAMA
CPC分类号： F02B23/10 , F02B23/101 , F02B2023/102 , F02F3/24 , Y02T10/125
摘要： A fuel injection valve is provided for a ceiling portion of a cylinder head. A tip of an ignition electrode is arranged in the vicinity of an injection tip of the fuel injection valve. A recess is provided for the ceiling portion. A center of a cavity is shifted with respect to a bore center of the cylinder. In a vertical cross-section of the inside of a combustion chamber taken along a plane passing through the injection tip of the fuel injection valve and the tip of the ignition electrode, a distance from the injection tip to a wall surface of the cavity at a side at which the ignition electrode is provided is longer than a distance from the injection tip to a wall surface of the cavity at an opposite side.
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公开(公告)号：US20210087999A1
公开(公告)日：2021-03-25
申请号：US16772328
申请日：2018-11-27
发明人： Kazuo ICHIKAWA , Yoshihisa NOU
摘要： An engine includes an output shaft, a cylinder head, a cylinder block, and a plurality of head bolts. The cylinder block includes three or more cylinder parts, a plurality of connecting portions, a plurality of output shaft supporting parts, and a plurality of head bolt holes. A side wall face of at least one cylinder part includes a first rib. The first rib diagonally extends from the connecting portion toward a head bolt hole base.
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公开(公告)号：US20210310401A1
公开(公告)日：2021-10-07
申请号：US17138513
申请日：2020-12-30
发明人： Yoshihisa NOU , Osamu AOKI , Yuji HARADA , Kenji UCHIDA , Xiyao GE
摘要： A combustion-chamber structure of an engine comprises a combustion chamber which is partitioned by a cylinder block, a cylinder head, a piston, an intake valve, and an exhaust valve. The intake valve (exhaust valve) comprises an intake valve body including an umbrella part having a valve head and a valve face, a heat-insulation layer provided at the valve head and having smaller heat conductivity than the valve body, a heat-barrier layer provided to cover the valve head with the heat-insulation layer and having smaller heat conductivity than the valve body and the heat-insulation layer, and a heat-diffusion layer provided between the heat-insulation layer and the heat-barrier layer and having larger heat conductivity than the heat-insulation layer and the heat-barrier layer. The heat-diffusion layer comprises a contact portion which contacts with the cylinder head when the intake valve is closed.
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公开(公告)号：US20210215119A1
公开(公告)日：2021-07-15
申请号：US16771581
申请日：2018-11-27
发明人： Kazuo ICHIKAWA , Yoshihisa NOU
IPC分类号： F02F7/00
摘要： An engine includes an output shaft, a cylinder block, a cylinder head, a cap portion, and head bolts. The cylinder block, the cylinder head, and the cap portion are fastened together with the head bolts. The cylinder block includes a cylinder portion and a plurality of output shaft supporting portions. When an outer wall face of at least one of the plurality of output shaft supporting portions is viewed along an output shaft axial direction, the outer wall face includes a first rib diagonally extending from a supporting portion of the output shaft toward one of two head bolt holes.
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公开(公告)号：US20180038306A1
公开(公告)日：2018-02-08
申请号：US15666884
申请日：2017-08-02
发明人： Noriyuki OTA , Yoshihisa NOU , Akira KAGEYAMA
CPC分类号： F02D41/402 , F01L1/34 , F01L3/04 , F01L3/12 , F01L2101/02 , F02D13/0223 , F02D41/2096 , F02D41/3023 , F02D2041/001 , F02D2041/389 , F02F3/26
摘要： A fuel injection valve is caused to inject fuel in a latter half of a compression stroke in such a manner that a fuel concentration immediately before start of combustion is higher in a middle portion of a combustion chamber than in an outer peripheral portion thereof in a low load range where the engine load is lower than a predetermined set reference load. An intake valve driving device is controlled in such a manner that an intake valve closing timing in the low load range is advanced on a retard side with respect to an intake bottom dead center in a case where the engine speed is high, as compared with a case where the engine speed is low, and intake air within a cylinder is blown back toward an intake port at least in a range where the engine speed is low.
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