JPS623953U - - Google Patents
Info
- Publication number
- JPS623953U JPS623953U JP9515085U JP9515085U JPS623953U JP S623953 U JPS623953 U JP S623953U JP 9515085 U JP9515085 U JP 9515085U JP 9515085 U JP9515085 U JP 9515085U JP S623953 U JPS623953 U JP S623953U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- compression ratio
- upper limit
- limit position
- control 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
- 238000002485 combustion reaction Methods 0.000 claims 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
第１図は本考案に係る圧縮比制御機構の一実施
例の制御ピストン近傍を断面にして示した断面図
、第２図は第１図の機構の第１図と直角方向の断
面図、第３図は第１図の機構の平面図、第４図は
従来の圧縮比可変機構の断面図、第５図は第３図
の機構の第３図とは直角の断面図、である。
１１……ピストン、１２……シリンダ、１３…
…ピストンピン、１４……コネクテイングロツド
、１６……偏心ベアリング、１７……ロツクピン
係合孔、１８……ロツクピン、１９……ロツクピ
ン収納穴、２０……ロツクピンロツク用油圧通路
、２１……ロツクピンアンロツク用油圧通路、２
２……ベース、２３……制御シリンダ、２４……
制御ピストン、２５……オイル通路、２６……オ
イルポンプ、２７……切換弁、２８……スプリン
グ、２９……プレート。
1 is a sectional view showing the vicinity of the control piston of an embodiment of the compression ratio control mechanism according to the present invention; FIG. 2 is a sectional view of the mechanism shown in FIG. 3 is a plan view of the mechanism shown in FIG. 1, FIG. 4 is a sectional view of a conventional variable compression ratio mechanism, and FIG. 5 is a sectional view of the mechanism shown in FIG. 3 at right angles to FIG. 11... Piston, 12... Cylinder, 13...
... Piston pin, 14 ... Connecting rod, 16 ... Eccentric bearing, 17 ... Lock pin engagement hole, 18 ... Lock pin, 19 ... Lock pin storage hole, 20 ... Hydraulic passage for lock pin lock, 21 ... Lock Hydraulic passage for pin unlock, 2
2... Base, 23... Control cylinder, 24...
Control piston, 25... oil passage, 26... oil pump, 27... switching valve, 28... spring, 29... plate.
Claims (1)
内外周が偏心された偏心ベアリングを介装して偏
心ベアリングの回転量に応じて圧縮比を変化させ
る内燃機関の圧縮比制御機構において、シリンダ
ブロツクにピストン下方に延出するベースを設け
、該ベースに上下方向に油圧によつて駆動可能に
制御ピストンを設け、該制御ピストンの上限位置
をピストンが下死点位置近傍にあるときにピスト
ンにあたつてピストンを上方に持上げる位置に設
定したことを特徴とする圧縮比制御機構。 In a compression ratio control mechanism for an internal combustion engine, an eccentric bearing whose inner and outer circumferences are eccentric is interposed between a piston pin and a connecting rod to change the compression ratio according to the amount of rotation of the eccentric bearing. A control piston is provided on the base that can be driven by hydraulic pressure in the vertical direction, and the upper limit position of the control piston is set such that the upper limit position of the control piston is set so that the upper limit position of the control piston is such that when the piston is near the bottom dead center position, the piston hits the piston. A compression ratio control mechanism characterized in that the compression ratio control mechanism is set at a position where it is lifted upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9515085U JPS623953U (en) | 1985-06-25 | 1985-06-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9515085U JPS623953U (en) | 1985-06-25 | 1985-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS623953U true JPS623953U (en) | 1987-01-10 |
Family
ID=30654134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9515085U Pending JPS623953U (en) | 1985-06-25 | 1985-06-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS623953U (en) |
-
1985
- 1985-06-25 JP JP9515085U patent/JPS623953U/ja active Pending