JPS6284602U

JPS6284602U -

Info

Publication number: JPS6284602U
Application number: JP17685885U
Authority: JP
Priority date: 1985-11-19
Filing date: 1985-11-19
Publication date: 1987-05-29

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例を示す動弁制御
装置の縦断面図、第２図は同上のレバーの縦断面
図、第３図は第２の実施例を示すレバーの縦断面
図、第４図は第３の実施例を示すロツカアームの
縦断面図、第５図は従来例を示す動弁制御装置の
縦断面図、第６図は同上の平面図、第７図はリフ
ト制御カムの部分の斜視図、第８図はバルブリフ
ト特性を示す線図、第９図は各種バルブリフト時
のバルブ加速度特性を示す線図である。１１……吸・排気弁駆動カム、１２……吸・排
気弁、１３……ロツカアーム、１５……レバー、
２０……リフト制御カム、２０ａ〜２０ｅ……カ
ム面、２３……制御軸、２４……捩りコイルスプ
リング、２６……モータ、２７……制御回路、５
１，６１，７１……緩衝部材、５２，６２，７２
……支持部材。 FIG. 1 is a longitudinal sectional view of a valve control device showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same lever, and FIG. 3 is a longitudinal sectional view of a lever showing a second embodiment. Figure 4 is a vertical cross-sectional view of a rocker arm showing the third embodiment, Figure 5 is a vertical cross-sectional view of a conventional valve control device, Figure 6 is a plan view of the same, and Figure 7 is a lift. FIG. 8 is a perspective view of the control cam portion, FIG. 8 is a diagram showing valve lift characteristics, and FIG. 9 is a diagram showing valve acceleration characteristics at various valve lifts. 11... Suction/exhaust valve drive cam, 12... Suction/exhaust valve, 13... Locker arm, 15... Lever,
20... Lift control cam, 20a-20e... Cam surface, 23... Control shaft, 24... Torsion coil spring, 26... Motor, 27... Control circuit, 5
1, 61, 71...buffer member, 52, 62, 72
...Supporting member.

Claims

[Scope of utility model registration request]

The back side of the rocker arm, whose both ends engage the intake/exhaust drive cam and the stem ends of the intake/exhaust valves, is brought into fulcrum contact with a lever that is swingably supported at one end. By engaging a polygonal lift control cam having a plurality of substantially flat cam surfaces of different shapes, and controlling the rotational position of the lift control cam to change the swinging position of the lever, the lever and rocker arm are The lift characteristics of the intake/exhaust valves are variably controlled by changing the fulcrum position in contact with the lift control cam, and the lift control cam is rotatably attached to the control shaft, and the lift control cam and the control shaft are elastically connected. In the valve control device for an internal combustion engine, the locker arm, the lever, and the lift control cam are provided with an actuator that is connected through a member and rotates the control shaft to a predetermined rotation position according to engine operating conditions. A valve control device for an internal combustion engine, characterized in that a buffer member is interposed between at least one combination of the above.