JPS61186732U

JPS61186732U -

Info

Publication number: JPS61186732U
Application number: JP7068385U
Authority: JP
Priority date: 1985-05-15
Filing date: 1985-05-15
Publication date: 1986-11-21
Also published as: JPH0433378Y2

Description

[Brief explanation of drawings]

第１図は内燃機関の側面断面図、第２図は第１
図の平面断面図、第３図は内燃機関の全体図、第
４図は吸気弁の開弁期間と噴射完了時期を示す線
図、第５図は噴射開始クランク角および噴射完了
クランク角を求めるフローチヤート、第６図は燃
料噴射処理のためのフローチヤート、第７図は制
御時間と機関回転数の関係を示す線図、第８図は
ＲＯＭに記憶された増量係数を示す線図である。４……シリンダヘツド、４ａ……シリンダヘツ
ド内壁面、４ｂ……陸起部、４ｃ……垂直側壁面
、５……燃焼室、６……点火栓、７……第１吸気
弁、８……第２吸気弁、９……第３吸気弁、１２
……第１吸気通路、１３……第２吸気通路、１４
……第３吸気通路、１９……吸気制御弁、２１…
…燃料噴射弁。 Figure 1 is a side cross-sectional view of the internal combustion engine, and Figure 2 is a cross-sectional side view of the internal combustion engine.
Fig. 3 is a general view of the internal combustion engine, Fig. 4 is a diagram showing the intake valve opening period and injection completion timing, and Fig. 5 is a diagram showing the injection start crank angle and injection completion crank angle. Flowchart, FIG. 6 is a flowchart for fuel injection processing, FIG. 7 is a diagram showing the relationship between control time and engine speed, and FIG. 8 is a diagram showing the increase coefficient stored in the ROM. . 4... Cylinder head, 4a... Cylinder head inner wall surface, 4b... Land rise portion, 4c... Vertical side wall surface, 5... Combustion chamber, 6... Spark plug, 7... First intake valve, 8... ...Second intake valve, 9...Third intake valve, 12
...First intake passage, 13...Second intake passage, 14
...Third intake passage, 19...Intake control valve, 21...
...Fuel injection valve.

Claims

[Scope of utility model registration request]

It is equipped with three intake valves consisting of a first intake valve, a second intake valve and a third intake valve, and three intake passages consisting of a first intake passage, a second intake passage and a third intake passage. A first intake passage for generating a swirling flow inside the room is connected to the combustion chamber through the first intake valve, and a second intake passage connected to the combustion chamber through the second intake valve is connected to the combustion chamber through the second intake valve. An intake control valve that opens during the intake stroke is disposed, and a fuel injection valve is disposed in a third intake passage connected to the combustion chamber via a third intake valve. A protrusion projecting downward on the inner wall surface of a cylinder head in a fuel injection internal combustion engine in which the third intake valve opens from near the top dead center to the beginning of the compression stroke, and the third intake valve opens from near the center of the intake stroke to the beginning of the compression stroke. At the same time, a vertical side wall surface having an arcuate cross section is formed on the raised portion, and the vertical side wall surface surrounds the peripheral edge of the third intake valve located on the periphery side of the combustion chamber, and the fuel injection completion timing of the fuel injection valve is determined. A fuel injection type internal combustion engine equipped with a plurality of intake valves that gradually advance the intake stroke from the end of the intake stroke to the beginning of the intake stroke as the engine speed increases.