JPH0452906U

JPH0452906U -

Info

Publication number: JPH0452906U
Application number: JP9668090U
Authority: JP
Priority date: 1990-09-14
Filing date: 1990-09-14
Publication date: 1992-05-06

Description

[Brief explanation of the drawing]

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図は第１図の―線拡大断面図、
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図は第２図の―
線断面図である。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、９１……ハウジング、９２……スプール弁体
、９５……作動油圧室、１０６……開閉制御弁と
してのソレノイド弁、１１６……チエツク弁。 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 sectional view taken along the line ``-'' in Figure 2, Figure 6 is an enlarged sectional view taken along the line ``-'' in Figure 1,
Fig. 7 is a diagram showing the oil supply system, Fig. 8 is a view taken along the - line in Fig. 2, Fig. 9 is a sectional view taken along the - line in Fig. 8, and Fig. 10 is a switching along the - line in Fig. 8. An enlarged sectional view when the valve is closed, Figure 11 is the same as in Figure 2.
FIG. 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 pressure supply source, 69... switching valve, 91... housing, 92... spool valve body, 95... working hydraulic chamber, 106... solenoid valve as an opening/closing control valve, 116... check valve.

Claims

[Scope of utility model registration request]

A plurality of rocker arms are supported on the fixed rocker shaft to open and close the engine valve, and these rocker arms are equipped with a hydraulic coupling switching mechanism that can switch between coupling and disconnection depending on the operating state of the engine. A spool is provided between the oil supply passage provided in the rock shaft through the hydraulic connection switching mechanism and the oil pressure supply source, and is movable between a position where high oil pressure is supplied to the oil supply passage and a position where low oil pressure is supplied. In a valve train for an internal combustion engine in which a switching valve in which the valve body is housed in a housing is interposed, the switching valve has a spool valve body that is spring-biased toward a low oil pressure supply position and is biased toward a high oil pressure supply position. A working hydraulic chamber is formed facing one end surface of the spool valve body to apply hydraulic pressure, and the working hydraulic chamber is connected to a hydraulic pressure supply source via an opening/closing control valve. A valve operating system for an internal combustion engine, characterized in that a check valve is interposed between the valves and opens at a hydraulic pressure higher than a set valve opening pressure to allow hydraulic oil to flow from the open/close control valve to the hydraulic pressure chamber.