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公开(公告)号：US11199140B2
公开(公告)日：2021-12-14
申请号：US16891969
申请日：2020-06-03
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Yoshiyuki Umemoto , Ryoichi Kanehira
Abstract: Provided is an engine, including: a cylinder including a cylinder liner; a piston provided inside the cylinder liner; a piston ring provided on the piston; a contact detector configured to detect a contact between a step formed in an inner peripheral surface of the cylinder liner and the piston ring; and a compression ratio controller configured to control a top dead center position of the piston so that the piston ring at the top dead center position is located on a combustion chamber side with respect to the step when the contact is detected.
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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
Applicant: IHI Corporation
Inventor： Yutaka Masuda , Takahiro Kuge , Takayuki Yamada , Takeshi Yamada , Jun Teramoto
Abstract: 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：US11174826B2
公开(公告)日：2021-11-16
申请号：US17008860
申请日：2020-09-01
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Yoshiyuki Umemoto , Jun Teramoto
Abstract: Provided is an engine, including: a cylinder; a piston accommodated in the cylinder; a combustion chamber facing the piston; a sliding portion (large-diameter portion) configured to perform a stroke motion together with the piston; a hydraulic surface of the sliding portion facing a side opposite to the combustion chamber; a hydraulic chamber, which the hydraulic surface faces; and an auxiliary hydraulic chamber, which communicates with the hydraulic chamber, and has a volume changeable in accordance with a hydraulic pressure in the hydraulic chamber.
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公开(公告)号：US11085380B2
公开(公告)日：2021-08-10
申请号：US16810155
申请日：2020-03-05
Applicant: IHI Corporation
Inventor： Yutaka Masuda , Takahide Aoyagi , Takayuki Hirose , Takayuki Yamada , Hayato Nakajima
Abstract: An engine control system includes: a delay estimating unit configured to estimate a auto-ignition delay based on first parameters including a composition of fuel gas; a auto-ignition predicting unit configured to predict a auto-ignition timing based on the auto-ignition delay; a completion predicting unit configured to predict a combustion completion timing of the fuel gas; and an operation control unit configured to control an engine based on a result of comparison between the auto-ignition timing and the combustion completion timing.
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公开(公告)号：US20150260115A1
公开(公告)日：2015-09-17
申请号：US14431552
申请日：2013-10-03
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Takayuki Yamada , Takayuki Hirose , Takahiro Kuge , Takeshi Yamada
CPC classification number: F02D41/0077 , F02B25/04 , F02B75/02 , F02B2075/025 , F02D13/0284 , F02D19/0692 , F02D19/10 , F02D41/0027 , F02D41/1459 , F02D41/3047 , F02D2041/001 , F02D2400/04 , F02M21/0275 , F02M21/0284 , Y02T10/18 , Y02T10/32 , Y02T10/36
Abstract: A uniflow scavenging 2-cycle engine includes a cylinder; a piston sliding in the cylinder; scavenging ports formed in an inner circumferential surface of one end of the cylinder in a piston stroke direction and suctioning an active gas into the combustion chamber according to the piston sliding motion; fuel injection valves inject a fuel gas into the active gas suctioned into the combustion chamber; and an exhaust port formed in the other end of the cylinder. An exhaust valve driving mechanism opens and closes exhaust valves such that a time required to displace an exhaust valve from a fully opened position to a fully closed position is longer than that required to displace the exhaust valve from the fully closed position to the fully opened position. With this constitution, an injection start timing of the fuel gas can be advanced while blow-by of the fuel gas is suppressed.
Abstract translation: 单流清扫2循环发动机包括气缸; 活塞在气缸中滑动; 清扫口形成在气缸的一端的内周面上沿活塞行程方向，并且根据活塞滑动运动将活性气体吸入燃烧室; 燃料喷射阀将燃料气体注入到被吸入到燃烧室中的活性气体中; 以及形成在气缸的另一端的排气口。 排气门驱动机构打开和关闭排气门，使得将排气阀从完全打开位置移动到完全关闭位置所需的时间比将排气阀从完全关闭位置移动到完全打开位置所需的时间长 。 利用这种构造，可以抑制燃料气体的窜气，可以提高燃料气体的喷射开始正时。
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Patent Agency Ranking
公开(公告)号：US11162440B2
公开(公告)日：2021-11-02
申请号：US17013409
申请日：2020-09-04
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Yoshiyuki Umemoto
Abstract: A variable compression device includes a piston rod, a first fluid chamber configured to move the piston rod in a direction in which a compression ratio is increased by supplying a pressurized working fluid thereto, a regulation member configured to regulate movement of the piston rod in a direction in which a compression ratio is increased, a second fluid chamber provided between the piston rod and the regulation member and configured to store the working fluid, a supply flow path configured to guide the working fluid supplied to the second fluid chamber, a discharge flow path configured to guide the working fluid discharged from the second fluid chamber, and a flow rate regulation unit provided in the discharge flow path and configured to regulate a flow of the working fluid when the piston rod approaches the regulation member.
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公开(公告)号：US11156172B2
公开(公告)日：2021-10-26
申请号：US16987567
申请日：2020-08-07
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Mitsuaki Hayashi
Abstract: Provided is a compression ratio varying mechanism, including: a discharge oil passage connected to a first hydraulic chamber; a supply oil passage connected to a hydraulic pump; a pump cylinder including a first oil storage chamber connected to the discharge oil passage and the supply oil passage and a second oil storage chamber partitioned from the first oil storage chamber by a plunger; a branch oil passage connected to the second oil storage chamber; and an orifice provided in the branch oil passage.
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公开(公告)号：US11306649B2
公开(公告)日：2022-04-19
申请号：US17080349
申请日：2020-10-26
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Yasunori Ashikaga , Yoshiyuki Umemoto
Abstract: Provided is an engine system including: a bypass pipe (bypass flow passage) connecting an upstream side and a downstream side of the turbine on an exhaust flow passage; a bypass valve configured to open and close the bypass flow passage; and a catalytic activation controller configured to control the bypass valve and a compression ratio of a combustion chamber.
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公开(公告)号：US11105281B2
公开(公告)日：2021-08-31
申请号：US17021357
申请日：2020-09-15
Applicant: IHI CORPORATION
Inventor： Yutaka Masuda , Yoshiyuki Umemoto , Toshihiko Shimizu
Abstract: Provided is a marine engine, including: an air controller configured to supply compressed air to a combustion chamber in an upstroke of a piston after a crash astern signal is output; a fuel controller configured to stop supply of fuel to the combustion chamber when the crash astern signal is output, and to resume the supply of the fuel after a backward rotation of a crankshaft; and a compression ratio controller configured to move a top dead center position of the piston toward an opposite side of a bottom dead center position of the piston when the crash astern signal is output, and the top dead center position of the piston is on the bottom dead center position side with respect to a predetermined position set in advance.
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公开(公告)号：US09810142B2
公开(公告)日：2017-11-07
申请号：US14634113
申请日：2015-02-27
Applicant: IHI Corporation
Inventor： Yutaka Masuda , Takayuki Yamada , Takayuki Hirose , Takahiro Kuge , Takeshi Yamada
IPC: F02B25/00 , F02B25/02 , F02D41/30 , F02B25/04 , F02M21/02 , F02B7/08 , F02D41/32 , F02D41/34 , F02D41/00 , F02D19/10 , F02D41/38 , F02B75/02
CPC classification number: F02B25/02 , F02B7/08 , F02B25/04 , F02B2075/025 , F02D19/10 , F02D41/0027 , F02D41/3094 , F02D41/32 , F02D41/34 , F02D2041/389 , F02D2250/08 , F02D2400/04 , F02M21/0275 , F02M21/0281 , F02M21/0284 , Y02T10/32 , Y02T10/36 , Y02T10/44
Abstract: A uniflow-scavenging-type two-cycle engine includes: a cylinder; a piston that slides in the cylinder; an exhaust port that is provided at a first end of the cylinder; an exhaust valve that opens and closes the exhaust port; a scavenging port that is provided in an inner circumferential surface of a second end of the cylinder in the stroke direction of the piston and inhales an active gas into a combustion chamber in accordance with a sliding movement of the piston; a plurality of fuel injection valves that inject a fuel gas to the active gas, which has been drawn in from the scavenging port to the combustion chamber, to thereby generate a premixed gas; and a fuel injection control unit that varies injection directions of fuel gas injected from a part or all of the fuel injection valves.
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