JPS61200460U

JPS61200460U -

Info

Publication number: JPS61200460U
Application number: JP8447985U
Authority: JP
Priority date: 1985-06-04
Filing date: 1985-06-04
Publication date: 1986-12-15

Description

[Brief explanation of drawings]

第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案の一実施例による燃料噴射式エン
ジンの概略構成図、第３図は上記装置におけるＣ
ＰＵ１７の演算処理のフローチヤートを示す図、
第４図はエンジン回転数とスロツトル弁開度とを
パラメータとする全サイクル噴射領域、間引き噴
射領域及び燃料カツト領域を示す図、第５図は軽
負荷時における各気筒の噴射タイミングを示す図
、第６図は本考案の他の実施例の演算処理のフロ
ーチヤートを示す図、第７図はエンジン回転数と
スロツトル弁開度をパラメータとする全気筒燃料
供給領域、一部気筒燃料カツト領域及び燃料カツ
ト領域を示す図、第８図は軽負荷時における気筒
の噴射タイミングを示す図である。２０……第１の燃料噴射弁、２１……吸気通路
、２２……第２の燃料噴射弁、２３……噴射弁駆
動手段、２４……負荷検出手段、２５……軽負荷
時制御手段、１……エンジン、２ａ〜２ｄ……気
筒、３ａ〜３ｄ……吸気マニホールド、１０ａ〜
１０ｄ……第１の燃料噴射弁、１１ａ〜１１ｄ…
…第２の燃料噴射弁、１２……スロツトル開度セ
ンサ、１３……回転数センサ、１７……ＣＰＵ。 Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a schematic configuration diagram of a fuel injection type engine according to an embodiment of the present invention, and FIG. 3 is a C
A diagram showing a flowchart of arithmetic processing of PU17,
FIG. 4 is a diagram showing a full cycle injection region, a thinning injection region, and a fuel cut region using engine speed and throttle valve opening as parameters, and FIG. 5 is a diagram showing injection timing for each cylinder under light load. FIG. 6 is a diagram showing a flowchart of arithmetic processing according to another embodiment of the present invention, and FIG. 7 shows a flowchart of all cylinder fuel supply area, partial cylinder fuel cut area, and partial cylinder fuel cut area using engine speed and throttle valve opening as parameters. FIG. 8 is a diagram showing the fuel cut region, and FIG. 8 is a diagram showing the injection timing of the cylinder at the time of light load. 20...First fuel injection valve, 21...Intake passage, 22...Second fuel injection valve, 23...Injection valve drive means, 24...Load detection means, 25...Light load control means, 1...Engine, 2a-2d...Cylinder, 3a-3d...Intake manifold, 10a-
10d...first fuel injection valve, 11a to 11d...
...Second fuel injection valve, 12...Throttle opening sensor, 13...Rotational speed sensor, 17...CPU.

Claims

[Scope of utility model registration request]

a first fuel injection valve provided in a cylinder of the engine; a second fuel injection valve provided in an intake passage of the engine;
, an injection valve driving means for driving one or both of the second fuel injection valves, a load detection means for detecting the engine load, and an output of the load detection means for driving the injection valve when the engine is under light load. When the load is light, the means is controlled to drive only the first fuel injection valve, and at that time, the first fuel injection valve is thinned out or the injection of the first fuel injection valves of some cylinders is stopped. A fuel injection engine characterized by comprising a control means.