JPS62165428U - - Google Patents
Info
- Publication number
- JPS62165428U JPS62165428U JP5207186U JP5207186U JPS62165428U JP S62165428 U JPS62165428 U JP S62165428U JP 5207186 U JP5207186 U JP 5207186U JP 5207186 U JP5207186 U JP 5207186U JP S62165428 U JPS62165428 U JP S62165428U
- Authority
- JP
- Japan
- Prior art keywords
- lock pin
- compression ratio
- eccentric bearing
- hydraulic passage
- connecting rod
- 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 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
第１図は本考案の一実施例に係る可変圧縮比機
構におけるピストン冷却装置の部分断面図で高圧
縮比の状態を示した断面図、第２図は第１図の装
置における低圧縮比の状態を示した断面図でロツ
クピン駆動用のオイルがオイル噴射通路から噴出
する状態を示した断面図、第３図は第１図の装置
における低圧縮比の状態を示した断面図でオイル
噴射通路とロツクピンアンロツク用油圧通路とが
非連通状態の場合を示した断面図、第４図は第１
図の装置におけるロツクピン駆動通路構造の断面
図、第５図は従来の可変圧縮比機構の断面図、第
６図は第５図の―線に沿う断面図、である。
２０……偏心ベアリング、２４……コネクテイ
ングロツド、２６……ロツクピン孔、２７……小
端部、２８……ピストン、３０……オイル噴射通
路、３１……ロツクピン案内溝、３５……ロツク
ピン収納穴、３６……ロツクピン、３７……ロツ
クピンロツク用油圧通路、３８……ロツクピンア
ンロツク用油圧通路。
FIG. 1 is a partial sectional view of a piston cooling device in a variable compression ratio mechanism according to an embodiment of the present invention, showing a high compression ratio state, and FIG. 2 is a sectional view showing a low compression ratio state in the device of FIG. 1. Figure 3 is a cross-sectional view showing the state in which oil for driving the lock pin is spouted from the oil injection passage, and Figure 3 is a cross-sectional view showing the low compression ratio state of the device in Figure 1, showing the oil injection passage. Fig. 4 is a sectional view showing the case where the lock pin unlocking hydraulic passage and the lock pin unlocking hydraulic passage are in a non-communicating state.
FIG. 5 is a cross-sectional view of a conventional variable compression ratio mechanism, and FIG. 6 is a cross-sectional view taken along line - in FIG. 5. 20... Eccentric bearing, 24... Connecting rod, 26... Lock pin hole, 27... Small end, 28... Piston, 30... Oil injection passage, 31... Lock pin guide groove, 35... Lock pin Storage hole, 36...Lock pin, 37...Hydraulic passage for locking the lock pin, 38...Hydraulic passage for unlocking the lock pin.
Claims (1)
との間にロツクピン案内溝を有する偏心ベアリン
グを介装し、前記コネクテイングロツドに摺動自
在に設けられたロツクピンをロツクピンロツク用
油圧通路の油圧により前記偏心ベアリングのロツ
クピン穴に嵌合させて偏心ベアリングをロツクす
ることにより高圧縮比とし、前記ロツクピンをロ
ツクピンアンロツク用油圧通路の油圧により前記
ロツクピン孔から外して偏心ベアリングのロツク
を解除することにより低圧縮比とした可変圧縮比
機構において、前記コネクテイングロツドの小端
部に、低圧縮比時の偏心ベアリングの回転に伴う
前記ロツクピン案内溝の変位により前記ロツクピ
ンアンロツク用油圧通路と連通し前記ロツクピン
アンロツク用油圧通路のオイルをピストン裏面に
向けて噴射するオイル噴射通路を設けたことを特
徴とする可変圧縮比機構におけるピストン冷却装
置。 An eccentric bearing having a lock pin guide groove is interposed between the piston pin and the small end of the connecting rod, and the lock pin, which is slidably provided on the connecting rod, is moved by the hydraulic pressure of the lock pin locking hydraulic passage. A high compression ratio is achieved by fitting the eccentric bearing into the lock pin hole of the bearing, and a low compression ratio is achieved by removing the lock pin from the lock pin hole using hydraulic pressure from the lock pin unlocking hydraulic passage to release the lock of the eccentric bearing. In the variable compression ratio mechanism, a small end of the connecting rod is connected to the hydraulic passage for unlocking the lock pin by displacement of the lock pin guide groove as the eccentric bearing rotates at a low compression ratio. A piston cooling device for a variable compression ratio mechanism, characterized in that an oil injection passage is provided for injecting oil from a pin unlocking hydraulic passage toward the back surface of the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5207186U JPS62165428U (en) | 1986-04-09 | 1986-04-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5207186U JPS62165428U (en) | 1986-04-09 | 1986-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62165428U true JPS62165428U (en) | 1987-10-21 |
Family
ID=30876911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5207186U Pending JPS62165428U (en) | 1986-04-09 | 1986-04-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62165428U (en) |
-
1986
- 1986-04-09 JP JP5207186U patent/JPS62165428U/ja active Pending
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