JPH0285808U

JPH0285808U -

Info

Publication number: JPH0285808U
Application number: JP16481088U
Authority: JP
Priority date: 1988-12-19
Filing date: 1988-12-19
Publication date: 1990-07-06

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例としての動弁系潤
滑用オイル循環装置を有するエンジンの断面図、
第２図は第１図におけるオイルジエツト機構を拡
大して示す断面図（第１図の部拡大断面図）、
第３図は本考案の第２実施例を示す要部断面図、
第４図ａ，ｂはそれぞれ本考案の第３実施例を示
す要部平面図および要部断面図、第５図ａ，ｂは
それぞれ本考案の第４実施例を示す要部平面図お
よび要部断面図、第６図ａ，ｂはそれぞれ本考案
の第５実施例を示す要部平面図および要部断面図
、第７図ａ，ｂはそれぞれ本考案の第６実施例を
示す要部平面図および要部断面図、第８図ａ，ｂ
はそれぞれ噴出オイルの流れ方向を北半球の場合
および南半球の場合について示す説明図、第９図
は潤滑用オイルの循環経路を示す概要図であり、
第１０図は従来例によるエンジンの断面図である
。１……シリンダブロツク、１Ａ……クランクケ
ース、２……シリンダ、３……ピストン、４……
吸気弁、５……排気弁、６……シリンダヘツド、
７……ロツカアーム、８……カム、９……オイル
パン、１０……オイル落し穴、１１……空気抜き
穴、１２……オイルジエツト機構を構成するノズ
ル、１３……オイルポンプ、１４……オイルクー
ラ、１５……オイルクーラバイパスバルブ、１６
……シリンダ、クランクシヤフトなどの各部、Ａ
……潤滑用オイル。 FIG. 1 is a sectional view of an engine having an oil circulation device for lubricating a valve train as a first embodiment of the present invention;
FIG. 2 is an enlarged cross-sectional view of the oil jet mechanism in FIG. 1 (an enlarged cross-sectional view of a portion of FIG. 1);
FIG. 3 is a sectional view of main parts showing a second embodiment of the present invention;
FIGS. 4a and 4b are a plan view and a sectional view of a main part showing a third embodiment of the present invention, respectively, and FIGS. FIGS. 6a and 6b are a plan view and a sectional view of a main part showing a fifth embodiment of the present invention, and FIGS. 7a and b are a main part of a sixth embodiment of the present invention, respectively. Plan view and sectional view of main parts, Fig. 8a, b
are explanatory diagrams showing the flow direction of jetted oil in the case of the northern hemisphere and the case of the southern hemisphere, respectively, and FIG. 9 is a schematic diagram showing the circulation path of lubricating oil,
FIG. 10 is a sectional view of a conventional engine. 1... Cylinder block, 1A... Crank case, 2... Cylinder, 3... Piston, 4...
Intake valve, 5...Exhaust valve, 6...Cylinder head,
7... Locker arm, 8... Cam, 9... Oil pan, 10... Oil pit, 11... Air vent hole, 12... Nozzle forming the oil jet mechanism, 13... Oil pump, 14... Oil cooler, 15...Oil cooler bypass valve, 16
...Each part of the cylinder, crankshaft, etc., A
...Lubricating oil.

Claims

[Scope of utility model registration request]

The oil in the oil pan below the cylinder block is driven by an oil pump, and the oil is supplied into the cylinder head that houses the valve train, so that the valve train is lubricated with the oil, and then the cylinder head is In an oil circulation system for lubricating a valve train in an internal combustion engine, the oil is returned to the oil pan side through an oil drop hole that opens to the cylinder head. characterized by
Oil circulation system for lubricating the valve train in internal combustion engines.