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Patent Searching and Data


Title:
VARIABLE COMPRESSION DEVICE, AND ENGINE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/132031
Kind Code:
A1
Abstract:
Disclosed is a variable compression device comprising a piston rod (6), a fluid chamber formation member (7a) that forms a portion of a fluid chamber (R3) that causes the piston rod to move in a direction in which the compression ratio increases due to being supplied with a working fluid, the pressure of which has been increased; a restriction member (7c) for restricting the movement of the piston rod in the direction in which the compression ratio increases; and sliding rings (6d) provided on the circumferential surface of the piston rod so as to be capable of sliding against the fluid chamber formation member. A lower space (R7) enclosed by the fluid chamber formation member and the piston rod is formed below the sliding rings, an upper space (R6) enclosed by the fluid chamber formation member, the piston rod, and the restriction member is formed above the sliding rings, and the fluid chamber formation member has a connecting passage (R11) for guiding, to the upper space, a portion of the working fluid that has been supplied to the lower space as a coolant.

Inventors:
MASUDA Yutaka (1-1 Toyosu 3-chome, Koto-k, Tokyo 10, 〒1358710, JP)
UMEMOTO Yoshiyuki (2-8, Kanda Suda-chou, Chiyoda-k, Tokyo 41, 〒1010041, JP)
Application Number:
JP2018/048570
Publication Date:
July 04, 2019
Filing Date:
December 28, 2018
Export Citation:
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Assignee:
IHI CORPORATION (1-1 Toyosu 3-chome, Koto-ku Tokyo, 10, 〒1358710, JP)
International Classes:
F02B75/32; F02B75/04; F02D15/02; F02F1/00; F16J1/09
Domestic Patent References:
WO2015108178A12015-07-23
Foreign References:
JP2016535838A2016-11-17
JPH10502986A1998-03-17
JPS5887942U1983-06-15
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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