公开(公告)号：US09790843B2

公开(公告)日：2017-10-17

申请号：US14935889

申请日：2015-11-09

Applicant: IHI Corporation

Inventor： Takahiro Kuge ,  Yutaka Masuda ,  Takayuki Yamada ,  Takeshi Yamada

IPC: F02B25/04 ,  F02D19/10 ,  F02M21/04 ,  F02M21/02 ,  F02D19/06 ,  F02B75/02

CPC classification number: F02B25/04 ,  F02B75/02 ,  F02B2075/025 ,  F02D19/0647 ,  F02D19/10 ,  F02M21/0278 ,  F02M21/042 ,  Y02T10/32 ,  Y02T10/36

Abstract: A uniflow scavenging 2-cycle engine includes a cylinder inside which a combustion chamber is formed; a piston which slides within the cylinder; a scavenge port which is provided on one end side in a stroke direction of the piston in the cylinder to suck an active gas into the combustion chamber in accordance with the sliding movement of the piston; and a fuel injection unit which has an injection port located on the outside of the cylinder, and injects the fuel gas into the active gas sucked into the scavenge port.

公开(公告)号：US11131254B2

公开(公告)日：2021-09-28

申请号：US16894749

申请日：2020-06-05

Applicant: IHI CORPORATION

Inventor： Yutaka Masuda ,  Yoshiyuki Umemoto ,  Toshihiko Shimizu ,  Takahiro Takimoto

IPC: F02D15/00 ,  B63H21/21 ,  F02B61/04 ,  F02B75/04 ,  F02D41/00

Abstract: Provided is a marine engine, including: a piston; and a compression ratio controller configured to execute lowering processing of moving a top dead center position of the piston toward a bottom dead center side when an engine rotation speed falls within a resonance occurrence range set in advance. A geometrical compression ratio is reduced, and a resonance stress caused by a torsional vibration in a rotary system can thus be suppressed while suppressing a decrease in thermal efficiency compared with a case in which retarding control is applied to a fuel injection timing or a closing timing of an exhaust valve.

公开(公告)号：US11098620B2

公开(公告)日：2021-08-24

申请号：US16953477

申请日：2020-11-20

Applicant: IHI CORPORATION

Inventor： Yutaka Masuda ,  Jun Teramoto ,  Ryo Ohara

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

Abstract: 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：US11053865B2

公开(公告)日：2021-07-06

申请号：US17021101

申请日：2020-09-15

Applicant: IHI Corporation

Inventor： Yutaka Masuda ,  Yoshiyuki Umemoto ,  Takahiro Takimoto ,  Jun Teramoto ,  Kazuki Yotsui ,  Keitoku Iguchi

IPC: F02B75/04 ,  F02D15/02 ,  B63H3/00 ,  F02B61/04

Abstract: A compression ratio control device includes a compression ratio controller configured to control a compression ratio of a combustion chamber so that the maximum combustion pressure approaches a combustion pressure upper limit value (cylinder-internal-pressure upper limit value) based on a detection signal of a detector at least when an engine load is equal to or less than a predetermined load (engine full load).