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公开(公告)号：US11125149B2
公开(公告)日：2021-09-21
申请号：US16375443
申请日：2019-04-04
申请人： SUBARU CORPORATION
发明人： Masaaki Kato
摘要： An intake device of an internal combustion engine includes a partition, a control valve, and a third passage. The partition divides an interior of an intake pipe that couples with a combustion chamber into a first passage and a second passage. The control valve is capable of opening and closing the first passage. The third passage opens at or near a coupling site between the partition and the intake pipe on an inner face of the second passage. The third passage is configured to be capable of sucking in at least a part of a boundary layer produced at or near the coupling site by a vapor flowing through the second passage in a state in which the control valve is working in a direction of closing the first passage.
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公开(公告)号：US11053838B2
公开(公告)日：2021-07-06
申请号：US15525002
申请日：2015-11-06
摘要： Diesel engines modified to be fueled with gaseous fuels experience problems with knocking and pre-ignition, limiting the compression ratio and efficiency of the engine. A new combustion chamber for a gaseous fueled internal combustion engine, in which the combustion chamber is defined by a cylinder head, a bore in a cylinder block and a piston reciprocating in the bore, comprises a piston portion of the combustion chamber defined by a recessed shape in a piston crown; and a head portion of the combustion chamber defined by a recessed surface in the cylinder head. A ratio between the piston portion of combustion chamber volume and the head portion of combustion chamber volume is in a range of 0.7 to 1.3.
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公开(公告)号：US10774777B2
公开(公告)日：2020-09-15
申请号：US16037533
申请日：2018-07-17
发明人： Sachio Mori , Koshiro Kimura , Satoshi Tsuda
IPC分类号： F02P5/00 , F02D43/00 , F02D41/00 , F02D41/14 , F02B23/08 , F02B31/06 , F02D35/02 , F02D31/00 , F02P5/04 , F02P5/145 , F02D41/18 , F02B23/10 , F02B31/00 , F02B75/12
摘要： An internal combustion engine includes an ignition plug and an electronic control unit. The electronic control unit is configured to: (i) execute a lean-burn operation in a first operation region, (ii) execute an operation in a second operation region at an air-fuel ratio lower than an air-fuel ratio during the lean-burn operation, and (iii) control a gas flow in a cylinder so that a ratio of a change in a gas flow speed around the ignition plug during ignition to a change in an engine rotation speed in a first engine rotation speed region within the first operation region is smaller than the ratio in a second engine rotation speed region within the second operation region.
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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：US10436134B2
公开(公告)日：2019-10-08
申请号：US15944840
申请日：2018-04-04
发明人： Keisuke Hayashi
IPC分类号： F02D41/02 , F02P5/15 , F02B31/00 , F02M63/02 , F01N3/10 , F02D41/14 , F02D41/40 , F02P5/04 , F02P15/08 , F02D41/00
摘要： When it is determined that the combustion state during the catalyst warm-up control is unstable, an additional ignition is performed on the TDC side relative to the discharge period CP. In a first countermeasure example, an additional ignition period CP2 is provided on the TDC side relative to the ignition period CP1 at the normal time while performing normal ignition and injection. A second countermeasure example is carried out when it is determined that the combustion state is still unstable despite the first countermeasure example. In the second countermeasure example, an additional ignition period CP3 which is a longer period than the additional ignition period CP2 is provided instead of the additional ignition period CP2.
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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：US10358988B2
公开(公告)日：2019-07-23
申请号：US15925065
申请日：2018-03-19
摘要： An internal combustion engine includes a first intake valve, a second intake valve, an accelerator open degree sensor that detects a load state, and an ECU 26 that controls the valve opening timing of the first and second intake valves and an amount of intake gas introduced to a combustion chamber from the first and second intake valves. When a load of a vehicle increases, the ECU reduces the ratio of the amount of intake gas from, among the two or more intake valves, the second intake valve having a later valve opening timing, whereas when the load decreases, the ECU increases the ratio.
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公开(公告)号：US10344705B2
公开(公告)日：2019-07-09
申请号：US15296425
申请日：2016-10-18
摘要： An engine has a cylinder head defining an intake port with a roof defining first and second valve guide bores upstream of first and second siamesed intake valve seats for a cylinder. The head has first and second asymmetric fairings extending outwardly from the roof and positioned directly upstream of respective bores. Each fairing has an inner wall intersecting an outer wall along an upstream edge and an inclined planar roof wall extending between the inner and outer walls. A method of forming the cylinder head and engine is also provided by milling the fairings from a roof preform formed with the intake port of the head.
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公开(公告)号：US10330006B2
公开(公告)日：2019-06-25
申请号：US15806196
申请日：2017-11-07
申请人： ACHATES POWER, INC.
发明人： Rishikesh Venugopal
摘要： A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.
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公开(公告)号：US10273890B2
公开(公告)日：2019-04-30
申请号：US15964885
申请日：2018-04-27
发明人： Masaaki Katayama
摘要： The internal combustion engine comprises a swirl control valve able to change a strength of a swirl generated in a combustion chamber; a load sensor for detecting an engine load; and a control device for controlling the swirl control valve. The control device controls the swirl control valve, when the engine load detected by the load sensor is lower than a predetermined load, so that the swirl ratio is higher when a suction intake gas amount is increasing, compared to when it is decreasing.
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