内燃機関の燃料供給制御装置

Fuel supply control device for internal combustion engine

Abstract

PROBLEM TO BE SOLVED: To control injection end time correctly in relation to a crank angle by obtaining angular acceleration of crank rotation from the change of generation interval of crank angle signal, predicting rotating speed change on the basis of this angular accceleration, and setting injection start time on the basis of the predicted result. SOLUTION: In a device computing an injection command signal for driving a fuel injection valve 9 by a control unit 1 inputting detection signals from various sensors 2-7 for detecting an operating state, angular acceleration of crank rotation is detected on the basis of the generation interval of crank angle signal based on the operating state of an engine at the time of detecting a reference position. On the basis of the crank angle acceleration and engine speed at the time of detecting the reference position, supply time predicting rotating speed change during actual fuel supply is converted into crank angle width on the basis of the predicted rotating speed change, and a fuel supply start crank angle is set on the basis of the converted crank angle width and a fuel supply end crank angle. COPYRIGHT: (C)1997,JPO
(57)【要約】 【課題】噴射指令から実際の噴射までに回転速度が変化 しても、噴射終了時期をクランク角度に対して正確に制 御できるようにすること。 【解決手段】クランク角度信号(POS)の発生間隔の 変化からクランク回転の角加速度A0を求め、この角加 速度A0に基づいて回転速度変化を予測し、その予測結 果に基づいて「噴射期間Tinj1(msec)」を「噴射期間θ inj1(deg CA)」に変換し、これを「所定の噴射終了クラ ンク角度θend(deg CA) 」から逆算して「噴射開始クラ ンク角度θstart1(deg CA)」を設定する。従って、噴射 指令から実際の噴射までに回転速度が変化しても、噴射 終了時期を、「所定の噴射終了クランク角度θend(deg CA) 」に高精度に制御することが可能となる。

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    US-8468999-B2June 25, 2013Toyota Jidosha Kabushiki KaishaFuel injection control system of internal combustion engine