JPH041607U

JPH041607U -

Info

Publication number: JPH041607U
Application number: JP4184390U
Authority: JP
Priority date: 1990-04-19
Filing date: 1990-04-19
Publication date: 1992-01-08

Description

[Brief explanation of drawings]

第１図乃至第９図はこの考案の一実施例を示す
もので、第１図はバルブタイミング調整装置の要
部の概略構成図、第２図は低速用ロツカーアーム
および高速用ロツカーアームの取付け状態を示す
縦断面図、第３図は第２図の−線断面図、第
４図は第２図の−線断面図、第５図は第２図
の−線断面図、第６図は連結ピンを示す斜視
図、第７図は高速用ロツカーアームとロツカーシ
ヤフトとの連結状態を示す縦断面図、第８図は同
横断面図、第９図は他の実施例を示す要部の縦断
面図、第１０図はバルブ開閉駆動用カムのベース
円区間とリフト区間とを示す平面図である。１１……ロツカーシヤフト、１３……低速用ロ
ツカーアーム、１４……高速用ロツカーアーム、
１６ａ，１６ｂ……バルブ、１６ｃ……シム（第
１のクリアランス調整手段）、２０……低速用カ
ム、２１……高速用カム、２２……カムシヤフト
、３１……連結ピン、３２……貫通穴、４２……
係合穴。 Figures 1 to 9 show an embodiment of this invention. Figure 1 is a schematic diagram of the main parts of the valve timing adjustment device, and Figure 2 shows the installation state of the low-speed rocker arm and the high-speed rocker arm. 3 is a sectional view taken along the - line in FIG. 2, FIG. 4 is a sectional view taken along the - line in FIG. 2, FIG. 5 is a sectional view taken along the - line in FIG. FIG. 7 is a vertical cross-sectional view showing the state of connection between the high-speed rocker arm and the rocker shaft, FIG. 8 is a cross-sectional view of the same, and FIG. 9 is a vertical cross-sectional view of main parts showing another embodiment. FIG. 10 is a plan view showing a base circle section and a lift section of the cam for driving the valve to open and close. 11...Rotsuker shaft, 13...Rotsuker arm for low speed, 14...Rotsuker arm for high speed,
16a, 16b...Valve, 16c...Shim (first clearance adjustment means), 20...Low speed cam, 21...High speed cam, 22...Camshaft, 31...Connecting pin, 32...Through hole , 42...
engagement hole.

Claims

[Claims for Utility Model Registration] A low-speed cam and a high-speed cam are mounted on a camshaft, and the low-speed cam drives a low-speed rocker arm, and the high-speed cam drives a high-speed rocker arm, respectively. In the low-speed rotation range of the engine, the low-speed rocker arm opens and closes the valves provided in the valve train of the engine according to the rotation of the low-speed cam, and in the high-speed rotation range of the engine, the high-speed cam is driven to open and close. A valve timing adjustment device provided with a switching operation mechanism that switches between the low-speed rocker arm and the high-speed rocker arm so that the high-speed rocker arm opens and closes the valve according to rotation, wherein the low-speed rocker arm and the high-speed rocker arm A rocker shaft in which either one of the rocker arms is fixed and the other rotatably mounted; an engagement hole formed in the joint surface of the rocker arm rotatably mounted on the rocker shaft; and the rocker shaft. a through hole formed at a position corresponding to the engaging hole in the through hole, and a through hole that is installed in a manner that can be protruded and retracted from a housing position accommodated in the through hole to a protruding position protruding toward the engaging hole, and the protruding position a connecting pin that is removably engaged in the engagement hole to switch the rocker shaft and the rotatable rocker arm into a connected state; and adjusting a valve clearance between the low-speed cam and the valve. A first clearance adjustment means; and a second clearance adjustment means for adjusting the mounting angle of the low-speed rocker arm with respect to the rocker shaft to adjust the clearance between the high-speed cam and the high-speed rocker arm. A valve timing adjustment device featuring: