内燃機関の燃料噴射量の補正装置、および、これを用いた内燃機関の制御装置

Correction device of fuel injection quantity of internal combustion engine and control device of internal combustion engine using this device

Abstract

PROBLEM TO BE SOLVED: To prevent rotational reduction, misfire and engine stall by eliminating a fuel correction to the lean side of the air-fuel ratio such as exceeding a combustion limit at the low temperature of an engine. SOLUTION: An operation control device has an air-fuel ratio state determining means for determining whether a state of the air-fuel ratio detected by an air-fuel ratio detecting means is rich or lean, a characteristic holding means for holding an integral gain characteristic and a proportional gain characteristic of determining a value by an engine speed and intake pipe pressure and a cooling water temperature factor characteristic of determining a cooling water temperature factor of correcting integral gain in response to the cooling water temperature, and a fuel correction quantity operation means for multiplying the integral gain by the cooling water temperature factor when determining a correction value of a fuel injection quantity by using a sign, the integral gain and proportional gain provided by a determining result of the air-fuel ratio state determining means. The cooling water temperature factor of the cooling water temperature factor characteristic is set smaller than a steady value in an area lower than the steady temperature in the cooling water temperature. COPYRIGHT: (C)2007,JPO&INPIT
【課題】機関低温時に燃焼限界を越えるような空燃比のリーン側への燃料補正をなくし、回転低下、失火、エンジン・ストールを防止すること。 【解決手段】空燃比検出手段によって検出される空燃比の状態がリッチであるかリーンであるかを判定する空燃比状態判定手段と、機関回転数及び吸気管圧力によって値が決定される積分ゲイン特性及び比例ゲイン特性と、冷却水温度に応じて積分ゲインを補正する冷却水温度係数が決定される冷却水温度係数特性とを保持する特性保持手段と、空燃比状態判定手段の判定結果によって得られる符号、積分ゲイン、及び、比例ゲインを用いて燃料噴射量の補正値を求める際に、積分ゲインに冷却水温度係数を乗算する燃料補正量演算手段とを備え、冷却水温度係数特性の冷却水温度係数は、冷却水の温度が定常温度より低い領域において、定常値よりも小さく設定される。 【選択図】図4

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Cited By (5)

    Publication numberPublication dateAssigneeTitle
    DE-112010005933-B4January 09, 2014Toyota Jidosha Kabushiki KaishaSteuervorrichtung für eine Verbrennungskraftmaschine
    DE-112010005933-T5September 26, 2013Toyota Jidosha Kabushiki KaishaSteuervorrichtung für eine Verbrennungskraftmaschine
    JP-2009156052-AJuly 16, 2009Toyota Motor Corp, トヨタ自動車株式会社内燃機関の空燃比制御装置
    US-7712459-B2May 11, 2010Toyota Jidosha Kabushiki KaishaAir-fuel ratio control system for internal combustion engine and control method of the same
    US-8793058-B2July 29, 2014Toyota Jidosha Kabushiki KaishaControl device for internal combustion engine