Method and system for controlling fuel pressure

A method for controlling rail pressure in a fuel supply system comprising a fuel pump 1, at least one injector 4 and a rail 3 connecting the injector (4) to the pump (1), comprises the steps of establishing a relationship between rail pressure (P) and a leak rate of the injector (4), estimating a fu...

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Bibliographische Detailangaben
Hauptverfasser:	DINTINO MAURA, PISONI EUGENIO, RAMPINO VINCENZO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	A method for controlling rail pressure in a fuel supply system comprising a fuel pump 1, at least one injector 4 and a rail 3 connecting the injector (4) to the pump (1), comprises the steps of establishing a relationship between rail pressure (P) and a leak rate of the injector (4), estimating a fuel drain rate from the rail based on a fuel injection rate (Qinj), rail pressure (P) and rail pressure/leak rate relationship; estimating a desired intake flow rate of the pump based on fuel drain rate and controlling the pump (1) to operate at a desired intake flow rate.