JPH0454953U

JPH0454953U -

Info

Publication number: JPH0454953U
Application number: JP9723090U
Authority: JP
Priority date: 1990-09-18
Filing date: 1990-09-18
Publication date: 1992-05-12
Anticipated expiration: 2005-09-18
Also published as: JP2512726Y2

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を示すシステム図、第
３図は燃料噴射制御ルーチンのフローチヤート、
第４図は補正指令条件判定ルーチンのフローチヤ
ート、第５図は密度学習ルーチンのフローチヤー
ト、第６図は従来の問題点を示す図である。１……機関、３……スロツトル弁、５……燃料
噴射弁、１０……コントロールユニツト、１１…
…エアフローメータ、１２……クランク角センサ
、１３……スロツトルセンサ。 Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a system diagram showing an embodiment of the present invention, FIG. 3 is a flowchart of a fuel injection control routine,
FIG. 4 is a flowchart of the correction command condition determination routine, FIG. 5 is a flowchart of the density learning routine, and FIG. 6 is a diagram showing problems in the conventional method. DESCRIPTION OF SYMBOLS 1... Engine, 3... Throttle valve, 5... Fuel injection valve, 10... Control unit, 11...
...Air flow meter, 12...Crank angle sensor, 13...Throttle sensor.

Claims

[Scope of Claim for Utility Model Registration] Basic fuel injection amount calculation means for calculating the basic fuel injection amount Tp=K×Q/N (K is a constant) from the intake air flow rate Q and the engine speed N, and the throttle valve opening degree. and a moving average ratio setting means for setting a moving average ratio SFLOAD according to the moving average ratio SFLOAD, and a basic fuel injection amount moving average calculation unit that calculates a basic fuel injection amount moving average AvTp from the following formula based on the moving average ratio SFLOAD. and AvTp=Tp×SFLOAD+AvTp×(
1-SFLOAD) Fuel injection amount calculation means for calculating the fuel injection amount Ti based on the basic fuel injection amount moving average AvTp; and change amount calculation means for calculating the change amount ΔAvTp in the basic fuel injection amount moving average AvTp. , under the condition that the amount of change ΔAvTp is less than a predetermined value,
Increase/decrease correction amount Cho according to the amount of change △AvTp
an increase/decrease correction means for calculating s and correcting the fuel injection amount Ti by adding the increase/decrease correction amount Chos; and a fuel injection amount calculation means calculated by the fuel injection amount calculation means at a predetermined fuel injection timing synchronized with engine rotation. a fuel injection means for injecting fuel at an injection amount Ti or an amount obtained by adding an increase/decrease correction amount Chos to the injection amount Ti by the increase/decrease correction means;
Interrupt injection amount IN according to the amount of change △AvTp
JSET and calculates the interrupt injection amount INJSET without waiting for the predetermined fuel injection timing.
In an electronically controlled fuel injection system for an internal combustion engine, the electronically controlled fuel injection device for an internal combustion engine includes: an interrupt injection means for injecting fuel; and an acceleration determination means for determining acceleration; a target basic fuel injection amount setting means for setting the basic fuel injection amount moving average AvTp during acceleration;
a comparison determination means for outputting a correction command signal when S exceeds the target basic fuel injection amount;
moving average ratio correction means for correcting FLOAD to a smaller side; correction direction reversing means for receiving the correction command signal and reversing the direction of correction by the increase/decrease correction means; and receiving the correction command signal and controlling the interrupt injection. An electronically controlled fuel injection device for an internal combustion engine, comprising: interrupt injection prohibition means for prohibiting operation of the means.