Method for operating fuel system of internal combustion engine mounted in e.g. motor vehicle, involves pulsing electrically driven fuel pump, periodically, in manner of pulse width modulation, by a relay and connecting to power supply

The fuel system (10) is comprised of at least one electrically driven fuel pump (16). The electrically driven fuel pump is periodically pulsed in the manner of pulse width modulation, by a relay (40) and is connected to the power supply (48). The duty ratio of the pulse width modulation is controlle...

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Bibliographische Detailangaben
1. Verfasser:	HERMES, HENNING
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	The fuel system (10) is comprised of at least one electrically driven fuel pump (16). The electrically driven fuel pump is periodically pulsed in the manner of pulse width modulation, by a relay (40) and is connected to the power supply (48). The duty ratio of the pulse width modulation is controlled and/or regulated, in dependence on the quantity of fuel to be pumped. The frequency of pulse width modulation is in the range of 1-100 Hz, preferably 10 Hertz. Independent claims are included for the following: (1) a control and/or regulating device for internal combustion engine; and (2) a computer program having instructions executed in control and/or regulating device of internal combustion engine. Es wird ein Verfahren zum Betreiben eines Kraftstoffsystems (10) für eine Brennkraftmaschine beschrieben, wobei das Kraftstoffsystem (10) mindestens eine elektrisch angetriebene Kraftstoffförderpumpe (16) umfasst, und wobei die elektrische Kraftstoffförderpumpe (16) mittels eines Relais (40) periodisch getaktet in der Art einer Pulsweitenmodulation (59) an eine Betriebsspannung (48) geschaltet wird. Dabei wird ein Tastverhältnis (60) der Pulsweitenmodulation (59) in Abhängigkeit von einer zu fördernden Kraftstoffmenge (58) gesteuert und/oder geregelt.