Title:
内燃機関
Document Type and Number:
Japanese Patent JP6898179
Kind Code:
B2
Abstract:
To provide a cylinder head capable of forming a strong tumble flow.SOLUTION: An upper inclination guide face 18 is formed on an upper face of a portion near a terminal end of a suction port 7. A suction valve seat 15 is mounted to a diameter-enlarging part 21 formed at the terminal end of the suction port 7. When seen from a vertical front view taken in a plane being orthogonal to a crank axial line and including axial cores of a suction valve 13 and the suction valve seat 15, the upper inclination guide face 18 is a profile defined by a straight line, and an upper part of the suction valve seat 15 is arranged on an upper side opposite to the suction port 7 across an extension line 22 of the upper inclination guide face 18. Accordingly, a step face 21a is swollen nearer the center of the suction port 7 than the suction valve seat 15. Intake air is injected to a cylinder bore 5 under a condition that it is strongly oriented without colliding with the suction valve seat 15. Accordingly, a strong tumble flow can be formed.SELECTED DRAWING: Figure 3
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Inventors:
Yoichi
Application Number:
JP2017166025A
Publication Date:
July 07, 2021
Filing Date:
August 30, 2017
Export Citation:
Assignee:
Daihatsu Motor Co., Ltd.
International Classes:
F02F1/42; F01L3/06; F02B31/00
Domestic Patent References:
| JP8042390A | ||||
| JP2017110604A | ||||
| JP8074584A | ||||
| JP2004308411A | ||||
| JP2009057830A |
Foreign References:
| US4187823 |
Attorney, Agent or Firm:
Hiroyuki Nishi
Ryuichi Watanabe
Ryuichi Watanabe