JPS6345043U

JPS6345043U -

Info

Publication number: JPS6345043U
Application number: JP13736786U
Authority: JP
Priority date: 1986-09-09
Filing date: 1986-09-09
Publication date: 1988-03-26
Also published as: JPH0455235Y2

Description

[Brief explanation of drawings]

第１図は本考案の構成を示すブロツク図、第２
図は本考案の一実施例を示す構成図、第３図は第
２図中のコントロールユニツトのブロツク回路図
、第４図は同上実施例の燃料噴射量計算ルーチン
を示すフローチヤート、第５図は同じく学習サブ
ルーチンを示すフローチヤート、第６図は同じく
制御特性図、第７図は同じく格子軸切換ルーチン
を示すフローチヤート、第８図は同じく学習進行
度が低い時の領域区分図、第９図は同じく学習進
行度が高い時の領域区分図、第１０図は領域の大
、小による経過時間と学習回数との関係を示すグ
ラフ、第１１図は同じく領域の大小による同一領
域間の空燃比のずれ量を示すグラフである。１……機関、６……エアフローメータ、１１…
…燃料噴射弁、１６……Ｏ_２センサ、１７……ク
ランク角センサ、３０……コントロールユニツト
。 Figure 1 is a block diagram showing the configuration of the present invention;
3 is a block circuit diagram of the control unit shown in FIG. 2, FIG. 4 is a flowchart showing the fuel injection amount calculation routine of the same embodiment, and FIG. 5 is a block diagram showing an embodiment of the present invention. 6 is a flowchart showing the learning subroutine, FIG. 6 is a control characteristic diagram, FIG. 7 is a flowchart showing the grid axis switching routine, FIG. 8 is a region division diagram when the learning progress is low, and FIG. Figure 10 is a graph showing the relationship between the elapsed time and the number of learning times depending on the size of the area, and Figure 11 is a graph showing the space between the same areas depending on the size of the area. It is a graph showing the amount of deviation in fuel ratio. 1... Engine, 6... Air flow meter, 11...
...Fuel injection valve, 16... _O2 sensor, 17...Crank angle sensor, 30...Control unit.

Claims

[Claims for Utility Model Registration] A first detection means for detecting the engine intake air flow rate;
an engine operating state detecting means including at least a second detecting means for detecting the engine rotation speed, and a third detecting means for detecting an engine exhaust component and thereby detecting the air-fuel ratio of the engine intake air-fuel mixture; basic fuel injection amount calculation means for calculating a basic fuel injection amount based on the engine intake air flow rate outputted by the detection means and the engine rotational speed outputted by the second detection means; a rewritable storage means that stores grid axes dividing into a plurality of regions and learning correction coefficients for correcting the basic fuel injection amount for each region surrounded by these grid axes; and an actual engine operating state. learning correction coefficient retrieval means for retrieving a learning correction coefficient for a corresponding region from the storage means based on the learning correction coefficient; and a learning correction coefficient retrieval means for retrieving a learning correction coefficient for a corresponding region from the storage means; a feedback correction coefficient setting means for increasing or decreasing a feedback correction coefficient by a predetermined amount for correcting the basic fuel injection amount so as to bring it closer to the fuel ratio; a basic fuel injection amount calculated by the basic fuel injection amount calculation means; a fuel injection amount calculation means for calculating a fuel injection amount based on the learning correction coefficient searched by the learning correction coefficient search means and the feedback correction coefficient set by the feedback correction coefficient setting means; A fuel injection means for injecting fuel into the engine on and off in response to a drive pulse signal corresponding to the fuel injection amount; a steady state detection means for detecting that the actual engine operating state is in a steady state; Learning correction that learns the deviation from the standard value of the feedback correction coefficient for each corresponding region when in a steady state, and corrects and rewrites the learning correction coefficient corresponding to the region of the engine operating state in a direction to reduce this deviation. coefficient modifying means; learning progress determining means for determining the degree of learning progress based on the number of times the learning correction coefficient is modified by the learning correction coefficient modifying means; When it is determined that the learning progress is high, the lattice axes are set so that each region partitioned by the lattice axes of the storage means is relatively large, and when it is determined that the learning progress is high, each region is relatively large. 1. A learning control device for an air-fuel ratio of an internal combustion engine, comprising: a lattice axis switching means for switching the lattice axis so that the target becomes smaller than the target.