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Title:
MARINE ENGINE
Document Type and Number:
WIPO Patent Application WO/2019/177108
Kind Code:
A1
Abstract:
A marine engine 100 is provided with: a piston; and a compression ratio control unit 182 that carries out a lowering process for moving the top dead-center position of the piston toward a bottom dead-center side when an engine rotation speed is within a preset resonance generation range. Due to lowering of a geometric compression ratio, this engine can suppress the resonance stress of torsional vibration of a rotary shaft system while suppressing a reduction of thermal efficiency as compared to when fuel injection timing and exhaust valve closing timing are controlled to be delayed.

Inventors:
MASUDA, Yutaka (1-1 Toyosu 3-chome, Koto-k, Tokyo 10, 〒1358710, JP)
UMEMOTO, Yoshiyuki (5292 Aioi, Aioi-sh, Hyogo 41, 〒6780041, JP)
SHIMIZU, Toshihiko (5292 Aioi, Aioi-sh, Hyogo 41, 〒6780041, JP)
TAKIMOTO, Takahiro (5292 Aioi, Aioi-sh, Hyogo 41, 〒6780041, JP)
Application Number:
JP2019/010588
Publication Date:
September 19, 2019
Filing Date:
March 14, 2019
Export Citation:
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Assignee:
IHI CORPORATION (1-1 Toyosu 3-chome, Koto-ku Tokyo, 10, 〒1358710, JP)
International Classes:
F02D15/02; F02B75/04
Foreign References:
JP2001123857A2001-05-08
JP2010242690A2010-10-28
JP2007170198A2007-07-05
JP2007032388A2007-02-08
Attorney, Agent or Firm:
AOMI PATENT (1-8-8, Kanda-ogawamachi Chiyoda-k, Tokyo 52, 〒1010052, JP)
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