JPS6371452U

JPS6371452U -

Info

Publication number: JPS6371452U
Application number: JP16564386U
Authority: JP
Priority date: 1986-10-30
Filing date: 1986-10-30
Publication date: 1988-05-13
Anticipated expiration: 2001-10-30
Also published as: JPH0523809Y2

Description

【図面の簡単な説明】[Brief explanation of the drawing]

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〜第１０図は演算処理内容を示すフローチヤ
ート、第１１図は一律学習補正係数についての学
習領域を示す図、第１２図はフイードバツク補正
係数の変化の様子を示す図である。１……機関、５……スロツトル弁、６……燃料
噴射弁、７……点火栓、８……点火コイル、９…
…デイストリビユータ、１４……コントロールユ
ニツト、１５……スロツトルセンサ、１７……ク
ランク角センサ、２０……Ｏ_２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, Figs. 3 to 10 are flowcharts showing the contents of calculation processing, Fig. 11 is a diagram showing the learning area for uniform learning correction coefficients, Fig. 12 FIG. 2 is a diagram showing how the feedback correction coefficient changes. 1... Engine, 5... Throttle valve, 6... Fuel injection valve, 7... Ignition plug, 8... Ignition coil, 9...
...Distributor, 14...Control unit, 15...Throttle sensor, 17...Crank angle sensor, 20... _O2 sensor.

Claims

【実用新案登録請求の範囲】機関に吸入される空気量に関与するパラメータ
を少くとも含む機関運転状態を検出する機関運転
状態検出手段と、機関排気成分を検出しこれにより機関吸入混合
気の空燃比を検出する空燃比検出手段と、前記機関運転状態検出手段により検出された前
記パラメータに基づいて基本燃料噴射量を設定す
る基本燃料噴射量設定手段と、機関運転状態の全エリアについて前記基本燃料
噴射量を一律に補正するための一律学習補正係数
を記憶した書換え可能な一律学習補正係数記憶手
段と、機関運転状態のエリア毎に前記基本燃料噴射量
を補正するためのエリア別学習補正係数を記憶し
た書換え可能なエリア別学習補正係数記憶手段と
、実際の機関運転状態に基づいて前記エリア別学
習補正係数記憶手段から対応する機関運転状態の
エリアのエリア別学習補正係数を検索するエリア
別学習補正係数検索手段と、前記空燃比検出手段により検出された空燃比と
目標空燃比とを比較し実際の空燃比を目標空燃比
に近づけるように前記基本燃料噴射量を補正する
ためのフイードバツク補正係数を所定の量増減し
て設定するフイードバツク補正係数設定手段と、前記基本燃料噴射量設定手段で設定した基本燃
料噴射量、前記一律学習補正係数記憶手段に記憶
されている一律学習補正係数、前記エリア別学習
補正係数検索手段で検索したエリア別学習補正係
数、及び前記フイードバツク補正係数設定手段で
設定したフイードバツク補正係数に基づいて燃料
噴射量を演算する燃料噴射量演算手段と、前記燃料噴射量演算手段で演算した燃料噴射量
に相当する駆動パルス信号に応じオンオフ的に燃
料を機関に噴射供給する燃料噴射手段と、各機関回転数でスロツトル弁の開度変化に対し
吸入空気流量がほぼ変化しなくなる所定の領域を
検出する一律学習領域検出手段と、前記一律学習領域検出手段により前記所定の領
域であることが検出されたとき、前記フイードバ
ツク補正係数の基準値からの偏差を学習しこれを
減少させる方向に前記一律学習補正係数記憶手段
の一律学習補正係数を修正して書換える一律学習
補正係数修正手段と、前記一律学習領域検出手段により前記所定の領
域であることが検出されないとき、機関運転状態
のエリア毎に前記フイードバツク補正係数の基準
値からの偏差を学習しこれを減少させる方向に前
記エリア別学習補正係数記憶手段のエリア別学習
補正係数を修正して書換えるエリア別学習補正係
数修正手段と、機関回転数と基本燃料噴射量とに応じた点火時
期の制御値を記憶した点火時期記憶手段と、前記基本燃料噴射量設定手段で設定した燃料噴
射量を前記一律学習補正係数記憶手段に記憶され
ている一律学習補正係数で補正する基本燃料噴射
量補正手段と、実際の機関回転数と前記基本燃料噴射量補正手
段により補正した基本燃料噴射量とに基づいて前
記点火時期記憶手段から対応する点火時期の制御
値を検索する点火時期検索手段と、前記点火時期検索手段により検索した点火時期
の制御値に基づく点火信号により点火動作する点
火手段と、を含んで構成されることを特徴とする内燃機関の
学習制御装置。[Scope of Claim for Utility Model Registration] Engine operating state detection means for detecting the engine operating state including at least parameters related to the amount of air taken into the engine; air-fuel ratio detection means for detecting a fuel ratio; basic fuel injection amount setting means for setting a basic fuel injection amount based on the parameter detected by the engine operating state detection means; A rewritable uniform learning correction coefficient storage means storing a uniform learning correction coefficient for uniformly correcting the injection amount, and an area-specific learning correction coefficient for correcting the basic fuel injection amount for each area of the engine operating state. Area-specific learning that searches for area-specific learning correction coefficients of areas with corresponding engine operating conditions from the stored rewritable area-specific learning correction coefficient storage means and the area-specific learning correction coefficient storage means based on the actual engine operating conditions. a correction coefficient search means; and a feedback correction coefficient for comparing the air-fuel ratio detected by the air-fuel ratio detection means with a target air-fuel ratio and correcting the basic fuel injection amount so as to bring the actual air-fuel ratio closer to the target air-fuel ratio. a feedback correction coefficient setting means for increasing or decreasing by a predetermined amount the basic fuel injection amount set by the basic fuel injection amount setting means, the uniform learning correction coefficient stored in the uniform learning correction coefficient storage means, and the area. a fuel injection amount calculation means for calculating a fuel injection amount based on the area-specific learning correction coefficient searched by the separate learning correction coefficient search means and the feedback correction coefficient set by the feedback correction coefficient setting means; and the fuel injection amount calculation means A fuel injection means that injects fuel into the engine on and off in response to a drive pulse signal corresponding to the fuel injection amount calculated by , and an intake air flow rate that almost does not change with respect to changes in the opening of the throttle valve at each engine speed. uniform learning area detection means for detecting a predetermined area; and when the uniform learning area detection means detects that the predetermined area is present, the deviation of the feedback correction coefficient from a reference value is learned and reduced. uniform learning correction coefficient correction means for correcting and rewriting the uniform learning correction coefficient of the uniform learning correction coefficient storage means in the direction; and when the uniform learning area detection means does not detect that the uniform learning correction coefficient is in the predetermined area, the engine operating state area-specific learning correction coefficient correction means for learning the deviation of the feedback correction coefficient from a reference value for each area, and correcting and rewriting the area-specific learning correction coefficient in the area-specific learning correction coefficient storage means in a direction to reduce the deviation; , ignition timing storage means that stores a control value of ignition timing according to the engine speed and the basic fuel injection amount, and the fuel injection amount set by the basic fuel injection amount setting means in the uniform learning correction coefficient storage means. A basic fuel injection amount correction means corrects using a stored uniform learning correction coefficient, and a response is made from the ignition timing storage means based on the actual engine speed and the basic fuel injection amount corrected by the basic fuel injection amount correction means. an ignition timing search means for searching for an ignition timing control value searched by the ignition timing search means; and an ignition means for igniting with an ignition signal based on the ignition timing control value searched by the ignition timing search means. A learning control device for internal combustion engines.