Fuel pump

A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the im...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HANAI KAZUMICHI, HONDA YOSHIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the impeller. Since a clearance C 2 between an impeller outer circumference face 16 p and a pump cover inner circumference face 39 c is made extremely small, the pressurized fuel is caused to pass via through-holes 16 c that communicate between an upper and an lower side of an impeller 16 . By this means, it is difficult for the pressurized fuel to enter the clearance C 2 , and it is possible to prevent the decrease in pump efficiency caused by pressure at the impeller outer circumference face 16 p and the vicinity thereof.