JPS6261910U - - Google Patents
Info
- Publication number
- JPS6261910U JPS6261910U JP15492985U JP15492985U JPS6261910U JP S6261910 U JPS6261910 U JP S6261910U JP 15492985 U JP15492985 U JP 15492985U JP 15492985 U JP15492985 U JP 15492985U JP S6261910 U JPS6261910 U JP S6261910U
- Authority
- JP
- Japan
- Prior art keywords
- cam
- intake
- exhaust valve
- lever
- lift control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 1
Landscapes
- Valve Device For Special Equipments (AREA)
Description
第1図〜第4図はこの考案に係る内燃機関の吸
・排気弁リフト制御装置の第1実施例を示す図で
あり、第1図は吸・排気弁リフト可変機構を示す
その縦断面図、第2図はその要部平面図、第3図
はそのリフト制御カムの取付部の分解斜視図、第
4図はコイルスプリングとその係止部とを示す分
解斜視図、第5図は比較例を示す斜視図、第6図
A,Bは比較例の作用を説明する各作用説明図、
第7図A,Bはこの実施例の作用を説明する各作
用説明図、第8図〜第10図はこの考案の第2実
施例を示す図であり、第8図はその吸・排気弁リ
フト可変機構を示すその縦断面図、第9図はその
油圧ピボツトを示す断面図、第10図はコイルス
プリングの取付部を示す分解斜視図、第11図A
,Bはこの考案の第3実施例を示す図であり、第
11図Aはコイルスプリングの取付部を示す分解
斜視図、第11図Bはその要部断面図、第12図
は従来の内燃機関の吸・排気弁リフト制御装置を
示すその縦断面図である。
11……駆動カム、12……吸・排気弁、13
……ロツカアーム、13a……背面、15……レ
バー、17……シリンダヘツド(機関本体)、2
0……リフト制御カム、20h……円筒部、20
i……溝(係止部)、23……カム制御軸、24
……コイルスプリング(弾性部材)、29……ホ
ルダ(支持部材)、29a……溝(係止部)。
1 to 4 are diagrams showing a first embodiment of an intake/exhaust valve lift control device for an internal combustion engine according to this invention, and FIG. 1 is a longitudinal sectional view showing a variable intake/exhaust valve lift mechanism. , Fig. 2 is a plan view of the main parts, Fig. 3 is an exploded perspective view of the attachment part of the lift control cam, Fig. 4 is an exploded perspective view showing the coil spring and its locking part, and Fig. 5 is a comparison. A perspective view showing an example, FIGS. 6A and 6B are action explanatory diagrams explaining the action of a comparative example,
7A and 7B are operation explanatory diagrams for explaining the operation of this embodiment, and FIGS. 8 to 10 are diagrams showing a second embodiment of this invention, and FIG. 8 is an illustration of the intake/exhaust valve. FIG. 9 is a longitudinal cross-sectional view showing the variable lift mechanism, FIG. 9 is a cross-sectional view showing the hydraulic pivot thereof, FIG. 10 is an exploded perspective view showing the mounting portion of the coil spring, and FIG. 11A
, B are views showing a third embodiment of this invention, FIG. 11A is an exploded perspective view showing the mounting part of the coil spring, FIG. 11B is a sectional view of the main part, and FIG. 12 is a conventional internal combustion engine. FIG. 2 is a longitudinal sectional view showing an engine intake/exhaust valve lift control device. 11... Drive cam, 12... Intake/exhaust valve, 13
...Rocker arm, 13a...Back, 15...Lever, 17...Cylinder head (engine body), 2
0...Lift control cam, 20h...Cylindrical part, 20
i...Groove (locking part), 23...Cam control shaft, 24
... Coil spring (elastic member), 29 ... Holder (supporting member), 29a ... Groove (locking part).
Claims (1)
ドとに両端が係合するロツカアームの湾曲形成さ
れた背面を、該背面に沿つて機関本体に揺動自由
に取り付けられたレバーに支点接触させ、該レバ
ーの一端部に係合させたリフト制御カムの回動量
をカム制御軸により制御してレバーの揺動位置を
変化させることにより、レバーとロツカアームと
の接触する支点位置を変化させて吸・排気弁のリ
フト特性を可変制御するようにした内燃機関の吸
・排気弁リフト制御装置において、前記リフト制
御カムから突出して形成された円筒部と前記カム
制御軸に設けた支持部材とに各係止部をそれぞれ
形成するとともに、弾性部材の両端の一部を所定
角度だけ円筒部および支持部材に拘束しつつ両端
を各係止部に曲げモーメントが均一に作用するよ
うに係止して、リフト制御カムとカム制御軸とを
該弾性部材を介して連結するようにしたことを特
徴とする内燃機関の吸・排気弁リフト制御装置。 The curved back surface of the rocker arm, whose ends engage with the intake/exhaust valve drive cam and the stem ends of the intake/exhaust valves, is brought into fulcrum contact with a lever that is swingably attached to the engine body along the back surface. By controlling the amount of rotation of the lift control cam engaged with one end of the lever by the cam control shaft and changing the swinging position of the lever, the fulcrum position where the lever and the rocker arm come into contact is changed and suction is performed. - In an intake/exhaust valve lift control device for an internal combustion engine configured to variably control the lift characteristics of an exhaust valve, a cylindrical portion formed protruding from the lift control cam and a support member provided on the cam control shaft each have a While forming locking portions, a portion of both ends of the elastic member are restrained to the cylindrical portion and the support member by a predetermined angle, and both ends are locked so that a bending moment acts uniformly on each locking portion, An intake/exhaust valve lift control device for an internal combustion engine, characterized in that a lift control cam and a cam control shaft are connected via the elastic member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15492985U JPH0326246Y2 (en) | 1985-10-09 | 1985-10-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15492985U JPH0326246Y2 (en) | 1985-10-09 | 1985-10-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6261910U true JPS6261910U (en) | 1987-04-17 |
JPH0326246Y2 JPH0326246Y2 (en) | 1991-06-06 |
Family
ID=31075165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15492985U Expired JPH0326246Y2 (en) | 1985-10-09 | 1985-10-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0326246Y2 (en) |
-
1985
- 1985-10-09 JP JP15492985U patent/JPH0326246Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPH0326246Y2 (en) | 1991-06-06 |
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