JPH0224014U

JPH0224014U -

Info

Publication number: JPH0224014U
Application number: JP10211088U
Authority: JP
Priority date: 1988-08-01
Filing date: 1988-08-01
Publication date: 1990-02-16

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示すもので、第１図
は内燃機関の要部縦断面図であつて第２図の―
線断面図、第２図は第１図の―線矢視図、
第３図は第２図の―線断面図、第４図は第１
図の―線断面図、第５図は第２図の―線
断面図、第６図は連結切換機構を示すための横断
面図、第７図は給油系統を示す図、第８図は第２
図の―線矢視図、第９図は第８図の―線
断面図、第１０図は第８図の―線に沿う切換
弁閉弁時の拡大断面図、第１１図はシリンダ孔お
よびスプール弁体の寸法を説明するための概略横
断面図、第１２図は第２図の―線断面図
、第１３図は切換弁開弁時の第１０図に対応した
断面図、第１４図はハウジングおよびスプール弁
体間の間隔の作動速度に及ぼす影響を実験した結
果を示すグラフである。１０ｉ……機関弁としての吸気弁、１０ｅ……
機関弁としての排気弁、１７ｉ，１７ｅ……動弁
装置、２２ｉ，２２ｅ……ロツカシヤフト、２３
ｉ，２３ｅ，２４ｉ，２４ｅ，２５ｉ，２５ｅ…
…ロツカアーム、２６ｉ，２６ｅ……油圧式連結
切換機構、５８ｉ，５８ｅ……給油路、６４……
油圧供給源としてのオイルポンプ、６９……切換
弁、８９……入口ポート、９０……出口ポート、
９１……ハウジング、９２……スプール弁体、９
４……シリンダ孔。 The drawings show one embodiment of the present invention, and FIG. 1 is a vertical sectional view of the main part of an internal combustion engine, and FIG.
Line sectional view, Figure 2 is a - line arrow view of Figure 1,
Figure 3 is a cross-sectional view taken along the line - in Figure 2, and Figure 4 is a cross-sectional view of Figure 1.
Figure 5 is a cross-sectional view taken along the line - in Figure 2, Figure 6 is a cross-sectional view showing the connection switching mechanism, Figure 7 is a diagram showing the oil supply system, and Figure 8 is a cross-sectional view taken along the line - in Figure 2. 2
Fig. 9 is a sectional view taken along line - in Fig. 8, Fig. 10 is an enlarged sectional view taken along line - in Fig. 8 when the switching valve is closed, and Fig. 11 shows the cylinder hole and A schematic cross-sectional view for explaining the dimensions of the spool valve body, Fig. 12 is a sectional view taken along the line - - in Fig. 2, Fig. 13 is a sectional view corresponding to Fig. 10 when the switching valve is open, Fig. 14 is a graph showing the results of an experiment on the influence of the distance between the housing and the spool valve body on the operating speed. 10i... Intake valve as engine valve, 10e...
Exhaust valve as engine valve, 17i, 17e...Valve train, 22i, 22e...Rock shaft, 23
i, 23e, 24i, 24e, 25i, 25e...
...Lotsuka arm, 26i, 26e...Hydraulic connection switching mechanism, 58i, 58e...Oil supply path, 64...
Oil pump as a hydraulic supply source, 69... switching valve, 89... inlet port, 90... outlet port,
91...Housing, 92...Spool valve body, 9
4...Cylinder hole.

Claims

[Scope of utility model registration request]

A fixed locking shaft supports multiple locking arms to open and close the engine valve, and these locking arms are equipped with a hydraulic connection switching mechanism that can connect and disconnect each other according to the operating state of the engine. An oil supply passage leading to the hydraulic connection switching mechanism is provided in the rock shaft, and between the oil supply passage and the hydraulic pressure supply source, an inlet port communicating with the oil pressure supply source and an outlet port communicating with the oil supply passage are provided. An internal combustion engine in which a switching valve is disposed in a cylinder hole of a housing, and a switching valve is movable between a position where the inlet port and the outlet port communicate with each other and a position where the communication state is cut off, and a spool valve body is slidably fitted. In an engine valve train, the distance d between the inner surface of the cylinder hole of the switching valve and the outer surface of the spool valve body is d, where D is the outer diameter of the spool valve body.
A valve train for an internal combustion engine, characterized in that /D=0.75 to 7×10 ⁻³ is set as much as possible.