JPS61204937U - - Google Patents
Info
- Publication number
- JPS61204937U JPS61204937U JP8829885U JP8829885U JPS61204937U JP S61204937 U JPS61204937 U JP S61204937U JP 8829885 U JP8829885 U JP 8829885U JP 8829885 U JP8829885 U JP 8829885U JP S61204937 U JPS61204937 U JP S61204937U
- Authority
- JP
- Japan
- Prior art keywords
- lock pin
- crankshaft
- compression ratio
- pressure
- eccentric bearing
- 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 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
第１図は本考案の一実施例に係る圧縮比制御油
圧回路の系統図、第２図は第１図で切換弁が切換
つたときの系統図、第３図は従来の圧縮比可変機
構の断面図、第４図は第３図の機構の第３図とは
直角方向の断面図、第５図は第３図のクランクシ
ヤフト近傍のオイル通路の斜視図、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
、１５……クランクシヤフト、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、２２，２３，２５，２
６……油溝、２４Ａ，２４Ｂ……油孔、２９……
切換弁。
Fig. 1 is a system diagram of a compression ratio control hydraulic circuit according to an embodiment of the present invention, Fig. 2 is a system diagram when the switching valve is switched in Fig. 1, and Fig. 3 is a system diagram of a conventional compression ratio variable mechanism. 4 is a cross-sectional view of the mechanism shown in FIG. 3 in a direction perpendicular to FIG. 3, and FIG. 5 is a perspective view of the oil passage near the crankshaft shown in FIG. 3. 11... Piston, 12... Cylinder, 13...
... Piston pin, 14 ... Connecting rod, 15 ... Crankshaft, 16 ... Eccentric bearing, 17 ... Lock pin engagement hole, 18 ... Lock pin, 19 ... Lock pin storage hole, 20 ...
Hydraulic passage for lock pin locking, 21...Hydraulic passage for lock pin unlocking, 22, 23, 25, 2
6... Oil groove, 24A, 24B... Oil hole, 29...
switching valve.
Claims (1)
の間に偏心ベアリングを介装し、偏心ベアリング
の動きをロツクピンを用いて固定、解除して圧縮
比を可変とする内燃機関において、ロツクピン差
動用油圧通路を、クランク軸受部では軸中心に点
対称に設けられた２本の油溝から成りクランクシ
ヤフト内では前記２本の油溝に対応して形成した
２本の油孔から成る２本の通路から構成し、一方
の通路を加圧するとともに他方を減圧して加圧、
減圧を切換弁にて切換可能としたことを特徴とす
る圧縮比制御油圧回路。 In an internal combustion engine in which an eccentric bearing is interposed between the piston pin and the small end of the connecting rod, and the movement of the eccentric bearing is fixed and released using a lock pin to change the compression ratio, the lock pin differential hydraulic passage is used. In the crankshaft, there are two oil grooves formed symmetrically around the shaft center, and in the crankshaft there are two oil passages formed in correspondence with the two oil grooves. The pressure is increased by pressurizing one passage and reducing the pressure in the other.
A compression ratio control hydraulic circuit characterized by being able to switch pressure reduction using a switching valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8829885U JPS61204937U (en) | 1985-06-13 | 1985-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8829885U JPS61204937U (en) | 1985-06-13 | 1985-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61204937U true JPS61204937U (en) | 1986-12-24 |
Family
ID=30641299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8829885U Pending JPS61204937U (en) | 1985-06-13 | 1985-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61204937U (en) |
-
1985
- 1985-06-13 JP JP8829885U patent/JPS61204937U/ja active Pending
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