Title:
多気筒エンジンのシリンダヘッド
Document Type and Number:
Japanese Patent JP7425635
Kind Code:
B2
Abstract:
To provide a cylinder head capable of suppressing local overheating around an exhaust outlet and reducing an exhaust temperature.SOLUTION: A cylinder head 3 has an exhaust passage 51 that is provided for each cylinder 1 and extends from a corresponding combustion chamber 6 in a direction intersecting a cylinder row direction, an exhaust collection part 52 commonly connected to a plurality of exhaust passages 51, and a water jacket (30) formed adjacently to the exhaust collection part 52, and on an inner peripheral surface 43i of the exhaust collection part 52, an annular uneven part (60) extending along the circumferential direction is formed. The uneven part comprises an annular ridge 60 projecting from the inner peripheral surface 43i of the exhaust collection part 52. The exhaust whose flow velocity is increased at the ridge 60 in which an exhaust flow path is narrowed actively transfers heat to the ridge 60, and an exhaust temperature is reduced.SELECTED DRAWING: Figure 8
Inventors:
山▲崎▼ 信
Tokuyuki Takegata
Atsushi Daejeon
Yusuke Ito
Kazuo Shibata
Tokuyuki Takegata
Atsushi Daejeon
Yusuke Ito
Kazuo Shibata
Application Number:
JP2020046900A
Publication Date:
January 31, 2024
Filing Date:
March 17, 2020
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F02F1/42; F01P3/02; F02F1/36
Domestic Patent References:
| JP2013155690A | ||||
| JP2018035721A | ||||
| JP2013002310A | ||||
| JP2020172910A |
Attorney, Agent or Firm:
Oshima Patent Office