公开(公告)号：US20210071550A1

公开(公告)日：2021-03-11

申请号：US16953477

申请日：2020-11-20

申请人： IHI CORPORATION

发明人： Yutaka MASUDA ,  Jun TERAMOTO ,  Ryo OHARA

IPC分类号： F01M1/06 ,  F02B75/04 ,  F16J7/00

摘要： Provided is a compression ratio varying mechanism, including a communication hole including: a first opening opened in an outer peripheral side surface of a piston rod; and a second opening, which is prevented from being opposed to the first opening in a radial direction of a piston rod, and is connected to an oil passage at a position apart from the first opening in a stroke direction.

公开(公告)号：US20170175616A1

公开(公告)日：2017-06-22

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

CPC分类号： F02B25/04 ,  F02B23/10 ,  F02B31/00 ,  F02B43/02 ,  F02B75/04 ,  F02B75/044 ,  F02B2023/108 ,  F02D15/02 ,  F02D19/105 ,  Y02T10/125 ,  Y02T10/146 ,  Y02T10/32 ,  Y02T10/36

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.