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    Uniflow scavenging two-cycle engine
    2.
    发明授权
    Uniflow scavenging two-cycle engine 有权

    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

    IPC分类号： F02B25/04 ,  F02B43/02 ,  F02B75/04 ,  F02B23/10 ,  F02D15/02 ,  F02B31/00 ,  F02D19/10

    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.

    Engine control system
    5.
    发明授权
    Engine control system 有权

    公开(公告)号：US11085380B2

    公开(公告)日：2021-08-10

    申请号：US16810155

    申请日：2020-03-05

    申请人： IHI Corporation

    发明人： Yutaka Masuda ,  Takahide Aoyagi ,  Takayuki Hirose ,  Takayuki Yamada ,  Hayato Nakajima

    IPC分类号： F02P5/152 ,  F02D35/02 ,  F02D19/02 ,  F02D41/00 ,  F02P23/00

    摘要： 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.

    UNIFLOW SCAVENGING 2-CYCLE ENGINE
    6.
    发明申请
    UNIFLOW SCAVENGING 2-CYCLE ENGINE 审中-公开
    共同扫描2循环发动机

    公开(公告)号：US20150260115A1

    公开(公告)日：2015-09-17

    申请号：US14431552

    申请日：2013-10-03

    申请人： IHI CORPORATION

    发明人： Yutaka Masuda ,  Takayuki Yamada ,  Takayuki Hirose ,  Takahiro Kuge ,  Takeshi Yamada

    IPC分类号： F02D41/00 ,  F02M21/02 ,  F02B75/02 ,  F02B25/04

    CPC分类号： 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

    摘要： 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.

    摘要翻译： 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。