JPH01103716U

JPH01103716U -

Info

Publication number: JPH01103716U
Application number: JP20064287U
Authority: JP
Priority date: 1987-12-28
Filing date: 1987-12-28
Publication date: 1989-07-13
Also published as: JPH0439373Y2

Description

[Brief explanation of the drawing]

図面は本考案の構成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、１８ｉ，１８ｅ……カムシ
ヤフト、１８ｉ′，１８ｅ′……カムジヤーナル
部、１９ｉ，１９ｅ，２０ｉ，２０ｅ……低速用
カム、２１ｉ，２１ｅ……高速用カム、２６ｉ，
２６ｅ……連結切換機構、２９，３０ａ，３０ｂ
，３０ｃ……カムホルダ、５８……油圧供給路、
７８……給油路、８０……分岐油路。 The drawing shows an example of the configuration of the present invention.
Figure 1 is a longitudinal cross-sectional view of the main part of an internal combustion engine, and is a cross-sectional view taken along the line - in Figure 2, Figure 2 is a view taken along the line - in Figure 1, and Figure 3 is a cross-sectional view taken in the line - - in Figure 2. , Fig. 4 is a sectional view taken along the line - - of Fig. 1, Fig. 5 is a sectional view taken along the - line of Fig. 2, Fig. 6 is a cross-sectional view showing the connection switching mechanism, and Fig. 7 shows the oil supply system. It is a diagram. 1...Cylinder block, 2...Cylinder, 3
...Cylinder head, 18i, 18e...Camshaft, 18i', 18e'...Cam journal part, 19i, 19e, 20i, 20e...Low speed cam, 21i, 21e...High speed cam, 26i,
26e...Connection switching mechanism, 29, 30a, 30b
, 30c...cam holder, 58...hydraulic supply path,
78... Oil supply route, 80... Branch oil route.

Claims

[Scope of utility model registration request]

A plurality of cylinders are arranged in series in the cylinder block, and a pair of mutually parallel camshafts are 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 cams including a low-speed cam are fixedly installed in correspondence with the intake valve and exhaust valve of each cylinder, respectively, and a plurality of cams are fixedly installed in correspondence with the intake valve and exhaust valve of each cylinder in order to make sliding contact with each cam. The Rotsuka arm to be placed is
Lubricating oil supply for a DOHC multi-cylinder internal combustion engine that is equipped with a connection switching mechanism that can connect and disconnect each other according to oil pressure in order to change the operation mode of intake valves and exhaust valves according to the operating state of the engine. In the device, an oil supply path that is independent of the hydraulic pressure supply path for supplying hydraulic pressure to the connection switching mechanism is provided in the cylinder head at approximately the center along the arrangement direction of each cylinder, extending vertically. The cam holder located approximately in the center along the arrangement direction has a sliding contact portion between the low-speed cam of each cylinder on the intake side and the exhaust side and the rocker arm, as well as the upper end of the oil supply passage to supply lubricating oil to the cam journal portion of the camshaft. A DOHC characterized in that communicating branch oil passages are provided separately on the intake side and the exhaust side.
Lubricating oil supply system for multi-cylinder internal combustion engines.