JPS6383441U - - Google Patents
Info
- Publication number
- JPS6383441U JPS6383441U JP17830286U JP17830286U JPS6383441U JP S6383441 U JPS6383441 U JP S6383441U JP 17830286 U JP17830286 U JP 17830286U JP 17830286 U JP17830286 U JP 17830286U JP S6383441 U JPS6383441 U JP S6383441U
- Authority
- JP
- Japan
- Prior art keywords
- compression ratio
- hydraulic passage
- variable compression
- ratio mechanism
- drain discharge
- 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.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 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)
- Safety Valves (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Measuring Volume Flow (AREA)
Description
第１図は本考案の第１実施例に係る可変圧縮比
機構の油圧通路の系統図、第２図は第１図におけ
るクランクジヤーナル軸受部近傍の油圧通路の斜
視図、第３図は第２図を別方向から見た断面図、
第４図は本考案の第２実施例に係る可変圧縮比機
構の油圧通路の系統図、第５図は本考案の第３実
施例に係る可変圧縮比機構の油圧通路の系統図、
である。
３……ピストンピン、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、８……ロツクピン、１０……ロツクピン
ロツク用油圧通路、１１……ロツクピンアンロツ
ク用油圧通路、１２，１３，１８，１９……油溝
（油圧通路）、１４……油孔、１６……クランク
ピン軸受部、１７……クランクジヤーナル軸受部
、２０……オイルパン、２３……オイルポンプ、
２６……高圧縮比制御用油圧通路、２７……低圧
縮比制御用油圧通路、２８……方向切換弁、２９
……ドレン通路、３０……ドレン排出制限手段と
してのオリフイス、４０……ドレン排出制限手段
としてのリリーフ弁、５０……ドレン排出制限手
段としての電磁弁。
1 is a system diagram of the hydraulic passage of the variable compression ratio mechanism according to the first embodiment of the present invention, FIG. 2 is a perspective view of the hydraulic passage near the crank journal bearing in FIG. 1, and FIG. A sectional view of the figure seen from another direction,
FIG. 4 is a system diagram of a hydraulic passage of a variable compression ratio mechanism according to a second embodiment of the present invention, and FIG. 5 is a system diagram of a hydraulic passage of a variable compression ratio mechanism according to a third embodiment of the present invention.
It is. 3... Piston pin, 4... Connecting rod, 5... Crankshaft, 6... Eccentric bearing, 8... Lock pin, 10... Hydraulic passage for lock pin locking, 11... Hydraulic passage for lock pin unlocking, 12 , 13, 18, 19...Oil groove (hydraulic passage), 14...Oil hole, 16...Crank pin bearing section, 17...Crank journal bearing section, 20...Oil pan, 23...Oil pump,
26... Hydraulic passage for high compression ratio control, 27... Hydraulic passage for low compression ratio control, 28... Directional switching valve, 29
... Drain passage, 30... Orifice as drain discharge limiting means, 40... Relief valve as drain discharge limiting means, 50... Solenoid valve as drain discharge limiting means.
Claims (1)
間に回転可能に偏心ベアリングを介装し、前記コ
ネクテイングロツド側に設けられたロツクピンを
クランクジヤーナル軸受部およびクランクピン軸
受部に設けられた油圧通路を介して油圧駆動させ
ることにより前記偏心ベアリングの回転をロツク
しまたはロツクを解除させ、圧縮比を可変させる
ようにした内燃機関の可変圧縮比機構において、
該可変圧縮比機構の油圧通路のドレン通路に、排
出されるオイルの流れを制限するドレン排出制限
手段を設けたことを特徴とする可変圧縮比機構の
油圧通路。 (2) 前記ドレン排出制限手段が、オリフイスで
ある実用新案登録請求の範囲第１項記載の可変圧
縮比機構の油圧通路。 (3) 前記ドレン排出制限手段が、リリーフ弁で
ある実用新案登録請求の範囲第１項記載の可変圧
縮比機構の油圧通路。 (4) 前記ドレン排出制限手段が、電磁弁である
実用新案登録請求の範囲第１項記載の可変圧縮比
機構の油圧通路。[Claims for Utility Model Registration] (1) An eccentric bearing is rotatably interposed between the piston pin and the connecting rod, and the lock pin provided on the connecting rod side is connected to the crank journal bearing and the crank pin. In a variable compression ratio mechanism for an internal combustion engine, the rotation of the eccentric bearing is locked or unlocked by hydraulically driving the eccentric bearing through a hydraulic passage provided in the bearing portion, and the compression ratio is varied.
A hydraulic passage of a variable compression ratio mechanism, characterized in that the drain passage of the hydraulic passage of the variable compression ratio mechanism is provided with drain discharge restriction means for restricting the flow of discharged oil. (2) The hydraulic passage of the variable compression ratio mechanism according to claim 1, wherein the drain discharge limiting means is an orifice. (3) The hydraulic passage of the variable compression ratio mechanism according to claim 1, wherein the drain discharge limiting means is a relief valve. (4) The hydraulic passage of the variable compression ratio mechanism according to claim 1, wherein the drain discharge limiting means is a solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17830286U JPH048276Y2 (en) | 1986-11-21 | 1986-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17830286U JPH048276Y2 (en) | 1986-11-21 | 1986-11-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6383441U true JPS6383441U (en) | 1988-06-01 |
| JPH048276Y2 JPH048276Y2 (en) | 1992-03-03 |
Family
ID=31120306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17830286U Expired JPH048276Y2 (en) | 1986-11-21 | 1986-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048276Y2 (en) |
-
1986
- 1986-11-21 JP JP17830286U patent/JPH048276Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH048276Y2 (en) | 1992-03-03 |