JPS62188534U - - Google Patents
Info
- Publication number
- JPS62188534U JPS62188534U JP7535686U JP7535686U JPS62188534U JP S62188534 U JPS62188534 U JP S62188534U JP 7535686 U JP7535686 U JP 7535686U JP 7535686 U JP7535686 U JP 7535686U JP S62188534 U JPS62188534 U JP S62188534U
- Authority
- JP
- Japan
- Prior art keywords
- lock pin
- engagement hole
- eccentric bearing
- compression ratio
- variable compression
- 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 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
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図のイないしニは本考案の一実施例に係る
内燃機関の可変圧縮比機構のクランクピン部とク
ランクジヤーナル部の油溝の連通状態を示す断面
図、第２図は第１図の可変圧縮比機構の全体断面
図、第３図は第２図の―線に沿う断面図、第
４図は第２図のクランクシヤフト近傍のオイル通
路の斜視図、第５図は第１図の可変圧縮比機構に
おけるクランクシヤフトの回転角度とロツクピン
の油圧駆動時期との関係を示した関係図、第６図
は従来の可変圧縮比機構におけるクランクシヤフ
トの回転角度とロツクピンの油圧駆動時期との関
係を示した関係図、である。
３……ピストン、４……コネクテイングロツド
、５……クランクシヤフト、６……偏心ベアリン
グ、７……ロツクピン係合孔、８……ロツクピン
、９……ロツクピン収納穴、１２，１３……コネ
クテイングロツド側の油溝、１４……油孔、１８
，１９……クランクジヤーナル軸受側の油溝、Ｈ
ｉ１……ロツクピンの油圧駆動時期。
1 to 2 are cross-sectional views showing the state of communication between the oil grooves of the crank pin and crank journal of a variable compression ratio mechanism for an internal combustion engine according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along line - in FIG. 2, FIG. 4 is a perspective view of the oil passage near the crankshaft in FIG. 2, and FIG. 5 is a sectional view of the variable compression ratio mechanism. A relationship diagram showing the relationship between the rotation angle of the crankshaft and the hydraulic drive timing of the lock pin in a variable compression ratio mechanism. Figure 6 shows the relationship between the rotation angle of the crankshaft and the hydraulic drive timing of the lock pin in a conventional variable compression ratio mechanism. This is a relationship diagram showing the following. 3... Piston, 4... Connecting rod, 5... Crankshaft, 6... Eccentric bearing, 7... Lock pin engagement hole, 8... Lock pin, 9... Lock pin storage hole, 12, 13... Oil groove on the connecting rod side, 14...Oil hole, 18
, 19... Oil groove on the crank journal bearing side, H
i1 ...Hydraulic drive timing of lock pin.
Claims (1)
回転可能に偏心ベアリングを介装し、該偏心ベア
リングにロツクピン係合孔を設けるとともに、コ
ネクテイングロツド側にロツクピン係合孔に出入
りするロツクピンを設け、油圧によりロツクピン
をロツクピン係合孔に係合または離脱させ偏心ベ
アリングの回転をロツクまたはアンロツクさせる
ようにした内燃機関の可変圧縮比機構において、
前記ロツクピンを偏心ベアリングのロツクピン係
合孔に係合させる時のロツクピンの油圧駆動時期
を、クランクシヤフトの回転角度で上死点前９０
°から上死点後１８０°の範囲内に設定したこと
を特徴とする内燃機関の可変圧縮比機構。 An eccentric bearing is rotatably interposed between the piston pin and the connecting rod, a lock pin engagement hole is provided in the eccentric bearing, and a lock pin that goes in and out of the lock pin engagement hole is provided on the connecting rod side. In a variable compression ratio mechanism for an internal combustion engine, the rotation of an eccentric bearing is locked or unlocked by engaging or disengaging a lock pin with a lock pin engagement hole.
When the lock pin is engaged with the lock pin engagement hole of the eccentric bearing, the hydraulic drive timing of the lock pin is set to 90 degrees before top dead center in terms of the rotation angle of the crankshaft.
A variable compression ratio mechanism for an internal combustion engine, characterized in that the variable compression ratio mechanism is set within a range of 180 degrees after top dead center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7535686U JPS62188534U (en) | 1986-05-21 | 1986-05-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7535686U JPS62188534U (en) | 1986-05-21 | 1986-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62188534U true JPS62188534U (en) | 1987-12-01 |
Family
ID=30921420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7535686U Pending JPS62188534U (en) | 1986-05-21 | 1986-05-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62188534U (en) |
-
1986
- 1986-05-21 JP JP7535686U patent/JPS62188534U/ja active Pending