JPH02127708U

JPH02127708U -

Info

Publication number: JPH02127708U
Application number: JP3710389U
Authority: JP
Priority date: 1989-03-30
Filing date: 1989-03-30
Publication date: 1990-10-22

Description

[Brief explanation of drawings]

第１〜第７図は本考案の第１実施例を示し、第
１図は内燃機関の縦断正面図、第２図は吸気弁の
正面図、第３図は第２図−線断面図、第４図
は第３図−線断面図に対応する説明図、第５
図は第３図−線断面図、第６図は作用説明図
、第７図は温度と熱伝導時間との関係を示すグラ
フ、第８図は第４図に対応する本考案の第２実施
例の断面図である。Ｅ……内燃機関、ａ_１〜ａ_５……深さ、５……
燃焼室、８……吸気ポート、１０……吸気弁、１
５……弁棒、１７……弁頭、１８……大径端部、
１９弁座、２０_１……着座面、２０_２……外周面
、２１……端面、２２……凹所、２３_１〜２３_６……第１〜第６環状溝、２７……内周面、２８…
…仮想面。 1 to 7 show a first embodiment of the present invention, FIG. 1 is a longitudinal sectional front view of an internal combustion engine, FIG. 2 is a front view of an intake valve, FIG. 3 is a sectional view taken along the line of FIG. Figure 4 is an explanatory diagram corresponding to Figure 3 - Line sectional view, Figure 5
The figures are Fig. 3 - line cross-sectional view, Fig. 6 is an action explanatory diagram, Fig. 7 is a graph showing the relationship between temperature and heat conduction time, and Fig. 8 is a second implementation of the present invention corresponding to Fig. 4. FIG. 3 is an example cross-sectional view. E...Internal combustion engine, _a1 to _a5 ...Depth, 5...
Combustion chamber, 8... Intake port, 10... Intake valve, 1
5... Valve stem, 17... Valve head, 18... Large diameter end,
19 valve seat, 20 ₁ ... seating surface, 20 ₂ ... outer peripheral surface, 21 ... end surface, 22 ... recess, 23 ₁ to 23 ₆ ...First to sixth annular grooves, 27...Inner peripheral surface, 28...
...virtual surface.

Claims

[Claims for Utility Model Registration] (1) Consisting of a valve stem and an umbrella-shaped valve head connected to the valve stem, the valve head is located at the large diameter end of the valve head and is connected to the intake port. The valve includes a seating surface that seats on a valve seat, an outer circumferential surface that is located between the seating surface and the valve stem and faces the intake port, and an end surface that faces the combustion chamber, and the outer circumferential surface extends over its entire circumference. In an intake valve for an internal combustion engine having a plurality of annular grooves, the depth of the plurality of annular grooves is set to gradually increase from the annular groove on the seating surface side to the annular groove on the valve stem side, providing the valve head with a recess that opens to the end surface;
An intake valve for an internal combustion engine, characterized in that the inner circumferential surface of the recess is formed along a virtual plane including the bottom of each annular groove. (2) The intake valve for an internal combustion engine according to item (1), wherein the recess is formed deeply so that a bottom thereof reaches the valve stem. (3) The intake valve for an internal combustion engine according to item (1) or (2), which is a forged product in which the valve stem and the valve head are integrated.