JPS6340523U

JPS6340523U -

Info

Publication number: JPS6340523U
Application number: JP13541586U
Authority: JP
Priority date: 1986-09-03
Filing date: 1986-09-03
Publication date: 1988-03-16
Anticipated expiration: 2001-09-03
Also published as: JPH0511296Y2

Description

[Brief explanation of the drawing]

第１図は本考案の１実施例に係る強制空冷頭上
弁型副室式エンジンの部分液冷装置の要部の縦断
背面図、第２図はそのエンジンの縦断側面図、第
３図はそのエンジンの背面図、第４図は第１図の
Ａ―Ａ線横断平面図である。２…シリンダブロツク、３…ヘツドブロツク、
１２，１４，１５，２２，２３…冷却液路、１７
…昇液路、１８…降液路（プツシユロツド室）、
２７…副室、３０…吸気ポート、３１…排気ポー
ト、３２…冷却液ジヤケツト、３３…降液路（プ
ツシユロツド挿通路）、３４…昇液路、３５…肉
壁部、３６…貫通孔、３８…外部配管、３９…継
手、４０…継手３９の内端部、４１…隔壁、４２
…冷却液導入路、４９…リリーフ通路、５０…閉
弁バネ、５１…リリーフ弁。 Fig. 1 is a longitudinal sectional rear view of the main parts of a partial liquid cooling system for a forced air-cooled overhead valve pre-compartment engine according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional side view of the engine, and Fig. 3 is its side view. The rear view of the engine, FIG. 4, is a cross-sectional plan view taken along the line AA in FIG. 2...Cylinder block, 3...Head block,
12, 14, 15, 22, 23...Cooling liquid path, 17
...liquid riser path, 18...liquid fall path (push rod chamber),
27...Sub-chamber, 30...Intake port, 31...Exhaust port, 32...Cooling liquid jacket, 33...Liquid descending path (push rod insertion path), 34...Liquid rising path, 35...Wall portion, 36...Through hole, 38 ...External piping, 39...Joint, 40...Inner end of joint 39, 41...Partition wall, 42
...Cooling fluid introduction path, 49...Relief passage, 50...Valve closing spring, 51...Relief valve.

Claims

[Scope of utility model registration request]

An auxiliary chamber 27 is arranged on one side of the head block 3, and a cooling oil jacket 32 is formed around the auxiliary chamber 27, and a cooling oil supply hole 17 and a push rod chamber extending vertically on the other side of the cylinder block 2 are provided. 18 are lined up inside and outside, and on the other side of the headblock 3, an oil lifting passage 34 that extends vertically and communicates with the cooling oil side jacket 17 and a push rod insertion passage 33 that communicates with the push rod chamber 18 are provided inside and outside. Form by arranging
The lower part of the cooling oil supply path 17 is connected to the lubricating oil pump 10.
At the same time, the lower part of the push rod chamber 18 is connected to the oil pan 12, and the push rod insertion passage 33 and the liquid rising passage 34 are penetrated from the other side of the head block 3. A through hole 36 is formed through the wall 35 between the intake port 30 and the exhaust port 31 to reach the cooling oil jacket 32, and the cooling oil is led out from the cooling oil jacket 32 and flows into the head block 3.
The terminal end of an external pipe 38 formed on the outside of the through hole 36 is connected to the push rod insertion passage 33 via a joint fitted to the outer end of the through hole 36, and the inner end 40 of this joint 39 is connected to the liquid raising path. 34 and into the partition wall 41 that partitions the push rod insertion passage 33, and the through hole 36 is inserted into the inner end 40 of the joint 39.
A relief passage 49 is formed at the inner end 40 of the joint 39 to communicate the coolant introduction passage 42 and the push rod insertion passage 33. A forced air cooling system characterized in that a relief valve 51 is inserted into the relief passage 49, which is biased to open by the internal pressure of the coolant introduction passage 42 and biased to close by a valve closing spring 50 to open and close the relief valve 51. Partial oil cooling system for overhead valve subchamber type engines.