Title:
エンジンの燃焼室構造
Document Type and Number:
Japanese Patent JP7196553
Kind Code:
B2
Abstract:
To provide a combustion chamber structure for an engine using SI combustion and SPCCI combustion in combination for maintaining both a tumble flow and a swirl flow until a late period for a compression stroke.SOLUTION: A combustion chamber of the engine has a geometric compression ratio set to be 15 or over to enable the SPCCI combustion. A crown surface 50 of a piston 5 includes a cavity 51 recessed in a bowl shape, and an F side protruded part 52F and an R side protruded part 52R protruded in an outer periphery region of the cavity 51 in a cylinder axial direction and having a mountain shape along the pent roof shape of the ceiling surface of the combustion chamber. B/L is set in a range of being greater than 1.0 and equal to or smaller than 1.52, where L is a space between both the protruded parts 52F, 52R and B is the diameter of the piston 5.SELECTED DRAWING: Figure 12
Inventors:
Satoshi Imamura
Fukuma Mao
Yasushi Nakahara
Atsushi Inoue
Kota Matsumoto
Michiharu Kohno
Yuuya Honda
Futa Nishi
Fukuma Mao
Yasushi Nakahara
Atsushi Inoue
Kota Matsumoto
Michiharu Kohno
Yuuya Honda
Futa Nishi
Application Number:
JP2018215600A
Publication Date:
December 27, 2022
Filing Date:
November 16, 2018
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F02B23/10; F02B1/12; F02B11/00; F02F3/26; F16J1/09
Domestic Patent References:
| JP2018087566A | ||||
| JP10131756A | ||||
| JP2007100546A | ||||
| JP2002115549A | ||||
| JP2016121630A |
Attorney, Agent or Firm:
Masataka Kotani
Tsutomu Fukunari
Tsutomu Fukunari