JPH0264731U - - Google Patents
Info
- Publication number
- JPH0264731U JPH0264731U JP14277588U JP14277588U JPH0264731U JP H0264731 U JPH0264731 U JP H0264731U JP 14277588 U JP14277588 U JP 14277588U JP 14277588 U JP14277588 U JP 14277588U JP H0264731 U JPH0264731 U JP H0264731U
- Authority
- JP
- Japan
- Prior art keywords
- lock pin
- eccentric bearing
- connecting rod
- compression ratio
- ratio mechanism
- 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.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
第１図は本考案の第１実施例に係る可変圧縮比
機構における偏心ベアリングのロツク状態を示す
断面図、第２図は第１図の―線に沿う断面図
、第３図は第１図の可変圧縮比機構における偏心
ベアリングのアンロツク状態を示す断面図、第４
図は第１図における偏心ベアリングの斜視図、第
５図は第１図のダンピング室近傍を示す斜視図、
第６図は本考案の第２実施例に係る可変圧縮比機
構における偏心ベアリングのアンロツク状態を示
す断面図、第７図は第６図における偏心ベアリン
グの斜視図、第８図は従来の可変圧縮比機構の一
例を示す断面図、第９図は第８図の―線に沿
う断面図、である。
２０…コネクテイングロツド、２１…ピストン
ピン、２３…偏心ベアリング、２６…ロツクピン
収納穴、２７…ロツクピン、２８…ロツクピン係
合孔、２９…油圧通路（ロツクピンロツク用油圧
通路）、３１，４２…隆起部、３２…ダンピング
室、３３…逆止弁、３４…ピストン部材、３５…
付勢手段、３６…オリフイス。
1 is a sectional view showing the locked state of the eccentric bearing in the variable compression ratio mechanism according to the first embodiment of the present invention, FIG. Sectional view showing the unlocked state of the eccentric bearing in the variable compression ratio mechanism, No. 4
The figure is a perspective view of the eccentric bearing in Figure 1, Figure 5 is a perspective view showing the vicinity of the damping chamber in Figure 1,
Fig. 6 is a sectional view showing the unlocked state of the eccentric bearing in the variable compression ratio mechanism according to the second embodiment of the present invention, Fig. 7 is a perspective view of the eccentric bearing in Fig. 6, and Fig. 8 is a conventional variable compression ratio mechanism. FIG. 9 is a sectional view showing an example of the ratio mechanism, and FIG. 9 is a sectional view taken along the line - in FIG. 20... Connecting rod, 21... Piston pin, 23... Eccentric bearing, 26... Lock pin storage hole, 27... Lock pin, 28... Lock pin engagement hole, 29... Hydraulic passage (hydraulic passage for lock pin lock), 31, 42... Protrusion Part, 32... damping chamber, 33... check valve, 34... piston member, 35...
Biasing means, 36...orifice.
Claims (1)
偏心ベアリングを回転可能に介装し、前記コネク
テイングロツド側に設けられたロツクピン収納穴
にロツクピンを摺動自在に収納し、該ロツクピン
収納穴に接続される油圧通路にオイルを圧送して
前記ロツクピンを駆動させることにより前記偏心
ベアリングの回転をロツクまたはアンロツクする
ようにした内燃機関の可変圧縮比機構において、
前記偏心ベアリングに、半径方向外方に隆起する
隆起部を設け、前記コネクテイングロツドの前記
隆起部と対向する位置に、逆止弁を介して前記油
圧通路に接続されるダンピング室を形成し、該ダ
ンピング室に、前記偏心ベアリング側に付勢され
偏心ベアリングの隆起部との当接によつて前記付
勢方向と逆方向に移動し前記逆止弁側から流入し
たオイルをオリフイスを介して排出させるピスト
ン部材を配置したことを特徴とする可変圧縮比機
構。 An eccentric bearing is rotatably interposed between the piston pin and the connecting rod, a lock pin is slidably stored in a lock pin storage hole provided on the connecting rod side, and the lock pin is connected to the lock pin storage hole. In a variable compression ratio mechanism for an internal combustion engine, the rotation of the eccentric bearing is locked or unlocked by force-feeding oil to a hydraulic passageway to drive the lock pin,
The eccentric bearing is provided with a protuberance that protrudes outward in a radial direction, and a damping chamber is formed at a position facing the protrusion of the connecting rod and connected to the hydraulic passage via a check valve. , the oil that is biased toward the eccentric bearing and moves in the opposite direction to the biasing direction by contact with the protrusion of the eccentric bearing and flows from the check valve side is passed through the orifice into the damping chamber. A variable compression ratio mechanism characterized by disposing a piston member to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14277588U JPH0264731U (en) | 1988-11-02 | 1988-11-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14277588U JPH0264731U (en) | 1988-11-02 | 1988-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0264731U true JPH0264731U (en) | 1990-05-15 |
Family
ID=31409008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14277588U Pending JPH0264731U (en) | 1988-11-02 | 1988-11-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0264731U (en) |
-
1988
- 1988-11-02 JP JP14277588U patent/JPH0264731U/ja active Pending