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

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

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.

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

IPC: F02D7/00 ,  F02M57/02 ,  F02M59/10 ,  F02B3/06 ,  F02B75/02 ,  F02M47/02 ,  F02M59/46

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.

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).