EP 1119704 B1 20021218 - PUMP ARRANGEMENT FOR PROVIDING FUEL AT HIGH PRESSURE
Title (en)
PUMP ARRANGEMENT FOR PROVIDING FUEL AT HIGH PRESSURE
Title (de)
PUMPENANORDNUNG ZUR KRAFTSTOFFHOCHDRUCKERZEUGUNG
Title (fr)
ENSEMBLE POMPE POUR LA PRODUCTION D'UNE HAUTE PRESSION DE CARBURANT
Publication
Application
Priority
- DE 9901664 W 19990608
- DE 19846157 A 19981007
Abstract (en)
[origin: DE19846157A1] The inventive pump arrangement has a low-pressure pump (1) which draws fuel out of a fuel tank (2) and a high-pressure pump (10) with several pump elements (11). A supply line (3) leads from the low-pressure pump (1) to a suction valve (14) of each of the pump elements (11) respectively. A slide-type flow-regulating valve (4) and a differential pressure valve (5) are located in the supply line (3), the differential pressure valve being arranged on the exit side of the flow-regulating valve. A return line (6) leading to the fuel tank (2) branches off between the two valves (4, 5). The differential pressure valve (5) has an opening pressure that is greater than that of the suction valves (14). This prevents fuel from being drawn through the pump elements (11) when the high-pressure pump (10) is at zero delivery, but also ensures that the pump elements (11) are essentially evenly filled with fuel when the high-pressure pump (10) is operating and is partially full. The inventive pump arrangement for providing fuel at high pressure can be used in fuel injection systems of internal combustion engines, especially common-rail injection systems.
IPC 1-7
IPC 8 full level
F02M 37/00 (2006.01); F02M 59/46 (2006.01); F02M 63/02 (2006.01); F04B 49/22 (2006.01); F04B 49/24 (2006.01)
CPC (source: EP US)
F02M 63/0225 (2013.01 - EP US); F04B 49/225 (2013.01 - EP US); F04B 49/246 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DE 19846157 A1 20000413; DE 59903863 D1 20030130; EP 1119704 A1 20010801; EP 1119704 B1 20021218; JP 2002526716 A 20020820; US 6581577 B1 20030624; WO 0020753 A1 20000413
DOCDB simple family (application)
DE 19846157 A 19981007; DE 59903863 T 19990608; DE 9901664 W 19990608; EP 99936424 A 19990608; JP 2000574832 A 19990608; US 78692201 A 20010312