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Patent Searching and Data


Title:
VARIABLE COMPRESSION DEVICE AND ENGINE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/194025
Kind Code:
A1
Abstract:
The variable compression device according to the present disclosure comprises: a piston rod (6); a first fluid chamber (R3) which, by pressurised operating fluid being supplied, moves the piston rod in a direction that increases the compression ratio; a restriction member (7c) which restricts the movement of the piston rod in the direction that increases the compression ratio; a second fluid chamber (R6) which is provided between the piston rod and the restriction member, and stores the operating fluid; a supply passage (R7) which guides operating fluid supplied to the second fluid chamber; a discharge passage (R8) which guides operating fluid discharged from the second fluid chamber; and a flow rate restriction part (15b) which is provided to the discharge passage, and restricts the flow of the operating fluid when the piston rod approaches the restriction member.

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:
JP2019/012796
Publication Date:
October 10, 2019
Filing Date:
March 26, 2019
Export Citation:
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Assignee:
IHI CORPORATION (1-1 Toyosu 3-chome, Koto-ku Tokyo, 10, 〒1358710, JP)
International Classes:
F02B75/04; F02D15/02
Domestic Patent References:
WO2018083263A12018-05-11
WO2015108182A12015-07-23
Foreign References:
DE102016208209A12017-11-16
JPH10502986A1998-03-17
US4938192A1990-07-03
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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