JPH0224002U

JPH0224002U -

Info

Publication number: JPH0224002U
Application number: JP10210388U
Authority: JP
Priority date: 1988-08-01
Filing date: 1988-08-01
Publication date: 1990-02-16
Anticipated expiration: 2003-08-01
Also published as: JPH0736082Y2

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―線に沿う部
分切欠き平面図、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―線断面図である。１……シリンダブロツク、２……シリンダ、３
……シリンダヘツド、１０ｉ……機関弁としての
吸気弁、１０ｅ……機関弁としての排気弁、１７
ｉ，１７ｅ……動弁装置、１８ｉ，１８ｅ……カ
ムシヤフト、１９ｉ，１９ｅ，２０ｉ，２０ｅ，
２１ｉ，２１ｅ……カム、２２ｉ，２２ｅ……ロ
ツカシヤフト、２３ｉ，２３ｅ，２４ｉ，２４ｅ
，２５ｉ，２５ｅ……ロツカアーム、２６ｉ，２
６ｅ……油圧式連結切換機構、２９，３０……カ
ムホルダ、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、８７……油圧供給路、８８……給油口。 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.
2 is a partial cutaway plan view taken along the line - of Fig. 1, Fig. 3 is a sectional view taken along the - line of Fig. 2, Fig. 4 is a sectional view taken along the - line of Fig. 1, and Fig. 5 is a sectional view taken along the - line of Fig. 1. The figure is a cross-sectional view taken along the line -- of Fig. 2, Fig. 6 is a cross-sectional view showing the connection switching mechanism, Fig. 7 is a view showing the oil supply system, and Fig. 8 is a cross-sectional view taken along the - line of Fig. 2. . 1...Cylinder block, 2...Cylinder, 3
...Cylinder head, 10i...Intake valve as engine valve, 10e...Exhaust valve as engine valve, 17
i, 17e... Valve gear, 18i, 18e... Camshaft, 19i, 19e, 20i, 20e,
21i, 21e...cam, 22i, 22e...rock shaft, 23i, 23e, 24i, 24e
, 25i, 25e...Rotsuka arm, 26i, 2
6e...Hydraulic connection switching mechanism, 29, 30...Cam holder, 58i, 58e...Oil supply path, 64...
Oil pump as a hydraulic pressure supply source, 69...Switching valve, 87...Hydraulic pressure supply path, 88...Oil filler port.

Claims

[Scope of utility model registration request]

A plurality of cylinders are arranged in series in the cylinder block, and a camshaft is rotatably supported on both sides of each cylinder along the cylinder arrangement direction by a cylinder head and a cam holder fastened to the cylinder head. A plurality of rocker arms that respond to the rotation of the cams are supported on the rocker shaft, which is fixedly supported by the cylinder head and has a plurality of rocker arms corresponding to the engine valves of each cylinder. In order to change the opening/closing operation mode of the engine valve, a hydraulic connection switching mechanism is provided that can switch mutual connection and disconnection depending on the oil pressure, and the oil supply path that connects each hydraulic connection switching mechanism in common is a rock shaft. In a valve train for a multi-cylinder internal combustion engine, a cam holder located approximately at the center along the arrangement direction of each cylinder has a hydraulic pressure supply passage communicating with a hydraulic pressure supply source and the oil supply passage along the axial direction. A refueling port communicating with the oil supply path approximately at the center thereof is provided to open on the top surface of the cam holder, and a switching valve is installed on the top surface of the cam holder that can switch between communication and isolation between the oil pressure supply path and the oil fill port. Valve gear for multi-cylinder internal combustion engines.