JPH0352334U - - Google Patents

Description

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

第１図はシリンダヘツド内壁面の弁及びマスク
壁配置図、第２図は第１図の−縦断面図、第
３図は給排気弁開放時の燃焼室縦断面図、第４図
は給排気弁と噴射弁との開閉時期を示す角度線図
を示す。 １……燃焼室、２……給気弁、３……排気弁、
４……燃料噴射弁、６……マスク壁、７……シリ
ンダヘツド、７ａ……シリンダヘツド内壁面、９
……ピストン。 Figure 1 is a diagram of the arrangement of valves and mask walls on the inner wall of the cylinder head, Figure 2 is a vertical cross-sectional view of Figure 1, Figure 3 is a vertical cross-sectional view of the combustion chamber when the supply and exhaust valves are open, and Figure 4 is a vertical cross-sectional view of the combustion chamber when the supply and exhaust valves are open. An angle diagram showing the timing of opening and closing of an exhaust valve and an injection valve is shown. 1... Combustion chamber, 2... Air intake valve, 3... Exhaust valve,
4... Fuel injection valve, 6... Mask wall, 7... Cylinder head, 7a... Cylinder head inner wall surface, 9
……piston.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ポペツト型給排気弁を有し、シリンダヘツド内
壁面から燃焼室に向けて延びるマスク壁を給気弁
と排気弁との間に形成し、該マスク壁により排気
弁側に位置する給気弁周辺部と弁座間の新気の流
通を閉鎖し、シリンダヘツド内壁面の中央部の給
排気弁間に燃料噴射弁を設け、ピストンが下死点
近傍にある時にピストン頭部を指向して燃料を下
方に噴射するように燃料噴射時期を設定した構成
としたことを特徴とする筒内噴射２サイクル内燃
機関。 It has a poppet-type intake and exhaust valve, and a mask wall extending from the inner wall surface of the cylinder head toward the combustion chamber is formed between the intake valve and the exhaust valve, and the area around the intake valve located on the exhaust valve side is defined by the mask wall. A fuel injection valve is installed between the supply and exhaust valves in the center of the inner wall of the cylinder head, and fuel is directed toward the piston head when the piston is near the bottom dead center. A direct injection two-cycle internal combustion engine characterized by having a configuration in which fuel injection timing is set so as to inject fuel downward.