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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 (JP)
UMEMOTO YOSHIYUKI (JP)
SHIMIZU TOSHIHIKO (JP)
TAKIMOTO TAKAHIRO (JP)
Application Number:
JP2019/010588
Publication Date:
September 19, 2019
Filing Date:
March 14, 2019
Export Citation:
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Assignee:
IHI CORP (〒1358710, JP)
International Classes:
F02D15/02; F02B75/04
Foreign References:
JP2001123857A2001-05-08
JP2010242690A2010-10-28
JP2007170198A2007-07-05
JP2007032388A2007-02-08
JP2018050004A2018-03-29
JPS634307B21988-01-28
JP2016211462A2016-12-15
Attorney, Agent or Firm:
AOMI PATENT (〒1010052, JP)
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