Radial piston pump for high fuel pressure in IC engines with common-rail injection system has suction valve closure spring supported on pump piston and contained in long piston bore

The pump has a spring-loaded pump piston (16) in a cylinder chamber (32) connected to a suction valve (18). The valve closure body (28) is loaded by a closure spring (35), which is supported on the pump piston. The spring is a helical pressure spring and is mainly contained in a longitudinal bore (3...

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Bibliographische Detailangaben
Hauptverfasser:	LOESCH, GERD, BAUER, RUEDIGER
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BLASTING 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:	The pump has a spring-loaded pump piston (16) in a cylinder chamber (32) connected to a suction valve (18). The valve closure body (28) is loaded by a closure spring (35), which is supported on the pump piston. The spring is a helical pressure spring and is mainly contained in a longitudinal bore (33) in the pump piston. A bar-shaped shaft (36) of the closure body is guided in the spring. One end of the spring engages on the base (34) of the bore in the pump piston, the other end is supported on the valve plate (29) of the suction valve. Die Radialkolbenpumpe weist einen längsbewegbaren Pumpenkolben (16) in einem Zylinderraum (32) auf, welcher mit einem Saugventil (18) in Verbindung steht. Ein Schließkörper (28) des Saugventils (18) ist von einer in Richtung auf einen gehäusefesten Ventilsitz (27) wirkenden Ventilschließfeder (35) belastet. Die Ventilschließfeder (35) ist am Pumpenkolben (16) abgestützt. DOLLAR A Die Radialkolbenpumpe ist bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem, verwendbar.