JPH046756U - - Google Patents
Info
- Publication number
- JPH046756U JPH046756U JP4760790U JP4760790U JPH046756U JP H046756 U JPH046756 U JP H046756U JP 4760790 U JP4760790 U JP 4760790U JP 4760790 U JP4760790 U JP 4760790U JP H046756 U JPH046756 U JP H046756U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- jet
- conrod
- piston
- small end
- 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
- 239000003921 oil Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000346 nonvolatile oil Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Description
第１図は本考案の実施例に係るピストン冷却装
置の構成図、第２図は従来の固定オイルジエツト
冷却装置を示す構成図、第３図は従来のコンロツ
ド小端オイルジエツト冷却装置を示す構成図であ
る。
１……クランクケース、２……メインギヤラリ
ー、３……固定オイルジエツトノズル、４……ピ
ストン、５……オイルジエツト給油孔、６……ド
ーナツ状冷却空洞、７……コンロツド、１２……
クランクピン、１３……クランクピン給油孔、１
４……コンロツドメタル油溝、１５……コンロツ
ド給油孔、１８……コンロツド小端ジエツトオイ
ル噴射孔、１９……制御バルブ。
FIG. 1 is a block diagram of a piston cooling device according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional fixed oil jet cooling device, and FIG. 3 is a block diagram of a conventional conrod small end oil jet cooling device. be. DESCRIPTION OF SYMBOLS 1...Crankcase, 2...Main gear rally, 3...Fixed oil jet nozzle, 4...Piston, 5...Oil jet oil supply hole, 6...Donut-shaped cooling cavity, 7...Conrod, 12...
Crank pin, 13...Crank pin oil supply hole, 1
4...Conrod metal oil groove, 15...Conrod oil supply hole, 18...Conrod small end jet oil injection hole, 19...Control valve.
Claims (1)
ヤラリーから供給されるオイルをピストン背面に
向けて噴射する固定オイルジエツトノズル、ピス
トン背面に設けられ前記固定オイルジエツトノズ
ルよりのオイルジエツトを受けるオイルジエツト
給油孔、ピストン内部に設けられ前記オイルジエ
ツト給油孔に連通した冷却空洞、及び前記メイン
ギヤラリーから固定オイルジエツトノズルに供給
される油圧の下限を規定する制御バルブからなる
固定オイルジエツト冷却機構と、メインギヤラリ
ーからクランク軸及びコンロツド内部を経てコン
ロツド小端に至る給油孔、コンロツド小端に設け
られピストン中央部背面に向けてオイルを噴射す
るコンロツド小端ジエツトオイル噴射孔、及び前
記コンロツド小端ジエツトオイル噴射孔のオイル
噴射時期をエンジン回転中にコンロツドに働らく
慣性力が大端から小端の方向に作用するクランク
角範囲に限定する給油孔開閉部材からなるコンロ
ツド小端オイルジエツト冷却機構とを具えたこと
を特徴とする内燃機関のピストン冷却装置。 A fixed oil jet nozzle that is fixed to the engine crankcase and injects oil supplied from the main gear rally toward the back of the piston, an oil jet oil supply hole provided on the back of the piston that receives the oil jet from the fixed oil jet nozzle, and an inside of the piston. A fixed oil jet cooling mechanism includes a cooling cavity provided in the main gear rally and communicating with the oil jet oil supply hole, and a control valve that defines the lower limit of the oil pressure supplied from the main gear rally to the fixed oil jet nozzle. The oil injection timing of the oil supply hole that runs through the inside to the small end of the conrod, the jet oil injection hole at the small end of the conrod that injects oil toward the back of the center of the piston, and the jet oil injection hole at the small end of the conrod is determined by engine rotation. A piston for an internal combustion engine, comprising a conrod small end oil jet cooling mechanism comprising an oil supply hole opening/closing member that limits the inertial force acting on the conrod to a crank angle range in the direction from the large end to the small end. Cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4760790U JPH046756U (en) | 1990-05-09 | 1990-05-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4760790U JPH046756U (en) | 1990-05-09 | 1990-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046756U true JPH046756U (en) | 1992-01-22 |
Family
ID=31563683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4760790U Pending JPH046756U (en) | 1990-05-09 | 1990-05-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046756U (en) |
-
1990
- 1990-05-09 JP JP4760790U patent/JPH046756U/ja active Pending
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