Title:
The piston and sub A room type gas engine for sub A room type gas engines
Document Type and Number:
Japanese Patent JP6038339
Kind Code:
B2
Abstract:
To provide a piston for a prechamber-type gas engine and a prechamber-type gas engine taking into consideration the shape of the piston top surface portion so that the region where flame propagation due to torch jet is delayed, a piston for a prechamber-type gas engine where torch jet formed by combustion a prechamber fuel in a precombustion chamber is injected to a main combustion chamber through a plurality of injection holes, includes a piston top surface portion having a land portion formed in a first region extending between axis line directions of adjacent injection holes, and the first region is positioned at a higher position than a second region extending across the axis line direction. The land portion is formed on a cavity formed in the piston top surface portion. A plurality of land portions are provided corresponding to the plurality of injection holes, and the plurality of land portions are provided so as to be offset toward a same direction from a middle position between axis line directions of adjacent injection holes.
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Inventors:
Kazutoshi Nomura
Kenji Hiraoka
Akihiro Yuki
Tetsu Yamada
Kenji Hiraoka
Akihiro Yuki
Tetsu Yamada
Application Number:
JP2015541618A
Publication Date:
December 07, 2016
Filing Date:
October 08, 2014
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
F02B19/00; F02B23/00; F02B23/06; F02F3/26
Domestic Patent References:
JP2003278547A | 2003-10-02 | |||
JP2002122025A | 2002-04-26 | |||
JP2005315166A | 2005-11-10 | |||
JPH046533U | 1992-01-21 | |||
JP2011169170A | 2011-09-01 |
Attorney, Agent or Firm:
Seishin ip patent business corporation
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