FUEL PUMP CONTROLLER FOR INTERNAL COMBUSTION ENGINE

PURPOSE:To prevent the rotational frequency of a fuel pump from going higher than necessity, by outputting a duty control signal to a transistor so as to cause a terminal voltage of the fuel pump to become the target driving voltage. CONSTITUTION:A microcomputer 9 detects an actual terminal voltage...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TOMIZAWA NAOMI, KANO HIROYUKI, TOKI SHUICHI, GOKAN YOSHIAKI, HOSHINO YUKIO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent the rotational frequency of a fuel pump from going higher than necessity, by outputting a duty control signal to a transistor so as to cause a terminal voltage of the fuel pump to become the target driving voltage. CONSTITUTION:A microcomputer 9 detects an actual terminal voltage Vp'(Va-Vb) of a fuel pump 6 on the basis of a digital signal to be inputted, while it calculates a target driving voltage Vp of the fuel pump 6 from a neces sary supply of fuel, comparing the target driving voltage Vp with the terminal voltage Vp' of the fuel pump 6, and it outputs a duty control signal to a transis tor 7 via an output drive circuit 10 so as to cause the terminal voltage Vp' to become the target driving voltage Vp. Calculation of the target driving volt age Vp of the fuel pump 6 from the required quantity of fuel is determined after calculating the value between engine speed and driving pulse width of a fuel injection valve.