JPS58118215U - internal combustion engine - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来の内燃機関の一部断面側面図、第２図は第
１図の■−リ矢視図、第３図は第２図の■−更更新断面
図第４図は本考案の実施例に係る内燃機関の正面図、第
５２図は第４図の内燃機関の背面図、第６図は第４図の
Ｖｌ−ＶＩ横断面図、第７図は第６図の■−■縦断面図
である。 ”２・・・・・・シリンダ、２ａ・・・・・・シリンダ
頂面、４・・・・・・シリンダヘッド、４ａ、　　４ｂ
・・・・・・シリンダヘッドの側面、７・・・・・・冷
却ファン、８・・曲ピストン、　　　−１１・・・・・
・クランク軸、１２・・・・・・吸気弁、１３・・・・
・・排気弁、１６・・・・・・燃料噴射弁、２０・・・
・・・吸気通路、２１・・・・・・排気通路、２４・・
・・・・冷却風通路、２７・・・・・・弁間隙間、Ｗ・
・・・・・冷却風。 ｈ 第３回 ［ 「； ／ １ 第７図Fig. 1 is a partial cross-sectional side view of a conventional internal combustion engine, Fig. 2 is a view taken from the ■ - arrow direction in Fig. 1, and Fig. 3 is a sectional view of the updated version of Fig. 2. Fig. 4 is a cross-sectional view of the present invention. 52 is a rear view of the internal combustion engine of FIG. 4, FIG. 6 is a cross-sectional view taken along Vl-VI of FIG. 4, and FIG. 7 is a cross-sectional view of FIG. ■It is a vertical cross-sectional view. "2...Cylinder, 2a...Cylinder top surface, 4...Cylinder head, 4a, 4b
... Side of cylinder head, 7 ... Cooling fan, 8 ... Bent piston, -11 ...
・Crankshaft, 12...Intake valve, 13...
...Exhaust valve, 16...Fuel injection valve, 20...
...Intake passage, 21...Exhaust passage, 24...
...Cooling air passage, 27... Valve gap, W.
...Cooling air. h 3rd [ ``; / 1 Figure 7

Claims (1)

【実用新案登録請求の範囲】 シリンダ２の頂面２ａ上に締着固定したシリンダヘッド
４内に、ピストン８の頂面側に開口する吸気通路２０と
排気通路２１、ヲそれぞれ形成して該吸気通路２０と排
気通路セ１を吸気弁１２と排気弁１３によ２て開閉制御
する一方、前記吸気通路２０と排気通路２１の中間位置
に燃料噴射弁１６を取付はミさらに、前記シリンダ２の
側方にクランク軸１１と連動回転する冷却ファン７を配
設し該冷却ファン７によって発生せしめられる冷却風Ｗ
の一部を前記吸気通路２０と排気通路゛２１の周囲に形
成した冷却風通路２４内を流通せしめ−るようにした内
燃機関であって、前記吸気通路２０と排気通路２１を、
該吸気通路２０と排気通路２１の間に冷却風Ｗの流通を
許容し得る適宜大きさの弁間隙間２７を有する如く、前
記シリンダ２の前記冷却ファン７装着側の第１側面４ａ
側と該第１側面４ａに対してシリンダ軸心をはさんで対
向する第２側面４ｂ側とに適宜離隔させて形成する一方
、前記冷却風通路２４を、冷却風Ｗを前記弁間隙間２７
を介して前記冷却ファイアの回転力。 −− 向に沿う方向に向けて流通せしめ得る如゛く形成すると
゛ともにく該冷却風通路の冷却風入口を、前記冷却ファ
ン７を装置した前記シリンダヘッド４の第１側面４ａ上
のしかもシリンダ軸心に対して冷却風上流側となる位置
に開口せしめ、さらに、前記燃料噴射弁１６を前記弁間
隙間２７の冷却風出口側に配置したことを特徴とする内
燃機関。[Claims for Utility Model Registration] An intake passage 20 and an exhaust passage 21, which open toward the top surface of the piston 8, are respectively formed in the cylinder head 4 which is fastened and fixed on the top surface 2a of the cylinder 2. The opening and closing of the passage 20 and the exhaust passage 1 are controlled by the intake valve 12 and the exhaust valve 13 2, while the fuel injection valve 16 is installed at an intermediate position between the intake passage 20 and the exhaust passage 21. A cooling fan 7 that rotates in conjunction with the crankshaft 11 is disposed on the side, and the cooling air W generated by the cooling fan 7
An internal combustion engine in which a part of the cooling air is allowed to flow through a cooling air passage 24 formed around the intake passage 20 and the exhaust passage 21, wherein the intake passage 20 and the exhaust passage 21 are
The first side surface 4a of the cylinder 2 on the side where the cooling fan 7 is attached is provided with an inter-valve gap 27 of an appropriate size that allows the flow of the cooling air W between the intake passage 20 and the exhaust passage 21.
The cooling air passage 24 is formed so as to be appropriately spaced from the second side surface 4b that faces the first side surface 4a across the cylinder axis, and the cooling air passage 24 is formed so as to pass the cooling air W through the intervalve gap 27.
The rotating force of the cooling fire through. The cooling air inlet of the cooling air passage is formed so as to be able to flow in the direction along the direction of An internal combustion engine characterized in that the fuel injection valve 16 is opened at a position on the upstream side of the cooling air with respect to the shaft center, and the fuel injection valve 16 is further arranged on the cooling air outlet side of the intervalve gap 27.