JPS62122105U - - Google Patents

Info

Publication number
JPS62122105U
JPS62122105U JP990986U JP990986U JPS62122105U JP S62122105 U JPS62122105 U JP S62122105U JP 990986 U JP990986 U JP 990986U JP 990986 U JP990986 U JP 990986U JP S62122105 U JPS62122105 U JP S62122105U
Authority
JP
Japan
Prior art keywords
oil return
piston
crank chamber
return passage
passage
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
Application number
JP990986U
Other languages
Japanese (ja)
Other versions
JPH0618008Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1986009909U priority Critical patent/JPH0618008Y2/en
Publication of JPS62122105U publication Critical patent/JPS62122105U/ja
Application granted granted Critical
Publication of JPH0618008Y2 publication Critical patent/JPH0618008Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Check Valves (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の第１の実施例を示す縦断面
図、第２図は第２の実施例を示す縦断面図である
。 １…ピストン、１ａ…摺動面、１ｂ…凹所、２
ａ…シリンダ部、２ｃ…シリンダ内面、４…クラ
ンク室、１２…リターン通路、１３…連通孔、１
４…逆止弁、１５…トツプリング、１９…オイル
戻り通路。 FIG. 1 is a longitudinal sectional view showing a first embodiment of this invention, and FIG. 2 is a longitudinal sectional view showing a second embodiment. 1... Piston, 1a... Sliding surface, 1b... Recess, 2
a...Cylinder part, 2c...Cylinder inner surface, 4...Crank chamber, 12...Return passage, 13...Communication hole, 1
4... Check valve, 15... Top spring, 19... Oil return passage.

Claims (1)

【実用新案登録請求の範囲】 (1) ピストンの摺動方向が水平方向に設定され
た４サイクルエンジンのオイルリターン装置であ
つて、一端をクランク室側に開口したオイルのリ
ターン通路と、このリターン通路をシリンダ内面
の下部に開口させる連通孔とがシリンダ部の下部
に設けられ、上記連通孔が下死点におけるピスト
ンのトツプリングよりも上記クランク室側に配設
されてなることを特徴とする４サイクルエンジン
のオイルリターン装置。 (2) 上記リターン通路がピストン下降行程にお
ける上記クランク室の正圧により閉止し、ピスト
ン上昇行程における上記クランク室の負圧により
開放する逆止弁を備えた実用新案登録請求の範囲
第１項記載の４サイクルエンジンのオイルリター
ン装置。 (3) 上記ピストンの摺動面の下部に凹所が形成
され、この凹所が上記連通孔に対向する実用新案
登録請求の範囲第１項又は第２項に記載の４サイ
クルエンジンのオイルリターン装置。 (4) 上記リターン通路がローカアーム室から上
記クランク室へのオイル戻り通路の一部である実
用新案登録請求の範囲第１項ないし第３項のいず
れかに記載の４サイクルエンジンのオイルリター
ン装置。[Scope of Claim for Utility Model Registration] (1) An oil return device for a four-stroke engine in which the sliding direction of the piston is set in the horizontal direction, comprising an oil return passage with one end opened toward the crank chamber, and this return passage. A communication hole for opening a passage at the lower part of the inner surface of the cylinder is provided at the lower part of the cylinder part, and the communication hole is arranged closer to the crank chamber than the top ring of the piston at bottom dead center. Oil return device for 4-cycle engine. (2) Claim 1 of the utility model registration claim, wherein the return passage is provided with a check valve that is closed by the positive pressure in the crank chamber during the piston's downward stroke and opened by the negative pressure in the crank chamber during the piston's upward stroke. Oil return device for 4-cycle engine. (3) An oil return for a four-stroke engine according to claim 1 or 2, wherein a recess is formed in the lower part of the sliding surface of the piston, and the recess faces the communication hole. Device. (4) The oil return device for a four-cycle engine according to any one of claims 1 to 3, wherein the return passage is a part of an oil return passage from the loker arm chamber to the crank chamber.
JP1986009909U 1986-01-27 1986-01-27 Oil return device for 4-cycle engine Expired - Lifetime JPH0618008Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986009909U JPH0618008Y2 (en) 1986-01-27 1986-01-27 Oil return device for 4-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986009909U JPH0618008Y2 (en) 1986-01-27 1986-01-27 Oil return device for 4-cycle engine

Publications (2)

Publication Number Publication Date
JPS62122105U true JPS62122105U (en) 1987-08-03
JPH0618008Y2 JPH0618008Y2 (en) 1994-05-11

Family

ID=30795670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986009909U Expired - Lifetime JPH0618008Y2 (en) 1986-01-27 1986-01-27 Oil return device for 4-cycle engine

Country Status (1)

Country Link
JP (1) JPH0618008Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218308U (en) * 1975-07-29 1977-02-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218308U (en) * 1975-07-29 1977-02-09

Also Published As

Publication number Publication date
JPH0618008Y2 (en) 1994-05-11

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