JPS6278327U

JPS6278327U -

Info

Publication number: JPS6278327U
Application number: JP16924985U
Authority: JP
Priority date: 1985-11-05
Filing date: 1985-11-05
Publication date: 1987-05-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の側面断面図、第２
図は第１図の平面断面図、第３図は同上実施例の
全体図、第４図は第２２吸気弁の駆動機構の側面
断面図、第５図は同上実施例における機関低負荷
時の第１及び第２吸気弁の開弁時期と燃料噴射時
期とを示す線図、第６図は吸入空気の流速を考慮
した最適の燃料噴射完了時期を示す線図、第７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８図は燃料噴射処理
のためのフローチヤート、第９図は制御時間と機
関回転数の関係を示す線図、第１０図はＲＯＭに
記憶された増量計数を示す線図、第１１図は別の
実施例のフローチヤート、第１２図はＲＯＭに記
憶された噴射開始クランク角を示す線図である。５……燃焼室、６……点火栓、７……第１吸気
弁、８……第２吸気弁、１０……第１吸気通路、
１１……第２吸気通路、１５……燃料噴射弁、６
０，６１……カム、６２……カム軸。 Figure 1 is a side cross-sectional view of one embodiment of the present invention;
The figure is a plan sectional view of FIG. 1, FIG. 3 is an overall view of the same embodiment, FIG. 4 is a side sectional view of the drive mechanism of the 22nd intake valve, and FIG. 5 is a plan view of the same embodiment at low engine load. A diagram showing the opening timing of the first and second intake valves and the fuel injection timing, Figure 6 is a diagram showing the optimal fuel injection completion timing considering the flow velocity of intake air, and Figure 7 is a diagram showing the injection start crank. Figure 8 is a flowchart for fuel injection processing, Figure 9 is a diagram showing the relationship between control time and engine speed, and Figure 10 is stored in ROM. FIG. 11 is a diagram showing the increase count, FIG. 11 is a flowchart of another embodiment, and FIG. 12 is a diagram showing the injection start crank angle stored in the ROM. 5... Combustion chamber, 6... Spark plug, 7... First intake valve, 8... Second intake valve, 10... First intake passage,
11...Second intake passage, 15...Fuel injection valve, 6
0, 61...Cam, 62...Cam shaft.

Claims

[Claims for Utility Model Registration] 1. A combustion chamber comprising two intake valves consisting of a first intake valve and a second intake valve, and two intake passages consisting of a first intake passage and a second intake passage. A first intake passage for generating a swirl flow is connected to the combustion chamber via a first intake valve, and a fuel injection valve is disposed within a second intake passage connected to the combustion chamber via a second intake valve. However, the first intake valve opens from near the top dead center of the intake stroke to the beginning of the compression stroke, and the second intake valve opens from near the center of the intake stroke when the engine is under partial load. Until the beginning of the stroke, when the engine is under high load, the timing is from near the top dead center of the intake stroke to the beginning of the compression stroke, and as the engine speed increases, the timing of completion of fuel injection from the fuel injector is changed from the end of the intake stroke to the beginning of the intake stroke. A fuel-injected internal combustion engine that is characterized by gradually accelerating the process. 2. The mechanism for controlling the opening timing of the second intake valve includes two cams with different cam profiles,
The fuel injection type internal combustion engine according to claim 1, wherein the timing of opening and closing of the second intake valve is controlled by switching and operating these two cams. 3. The fuel injection internal combustion engine according to claim 1, wherein the two cams are slidable in the axial direction of a camshaft on which these cams are attached.