COMMON RAIL MECHANISM

PROBLEM TO BE SOLVED: To improve the discharge characteristic of lubricating flow control valves at low engine speed. SOLUTION: This common rail mechanism has an adjustable spare feed pump for feeding a flow of fuel from a fuel tank to a high-pressure pump. The fuel flow is divided into a lubricatin...

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Bibliographische Detailangaben
Hauptverfasser:	LOESCH GERD, FAIX ERHARD
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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 TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve the discharge characteristic of lubricating flow control valves at low engine speed. SOLUTION: This common rail mechanism has an adjustable spare feed pump for feeding a flow of fuel from a fuel tank to a high-pressure pump. The fuel flow is divided into a lubricating flow via a valve system and a highly pressure-loaded high-pressure feed flow to be supplied to a high-pressure accumulator. The spare feed pump has a practically linear discharge characteristic curve 1 of preset gradients. The valve system for the lubricating flow has one valve, whose discharge characteristic curve 2 slopes up in a first section I at the same gradient as the discharge characteristic curve 1 of the spare feed pump in dependence on the speed of rotation of the spare feed pump, slopes up in a second section II generally linearly at a slightly gentler gradient than the spare feed pump discharge characteristic curve 1, and slopes down finally in a third section III.