EP 1141539 A1 20011010 - PISTON PUMP FOR HIGH-PRESSURE FUEL GENERATION
Title (en)
PISTON PUMP FOR HIGH-PRESSURE FUEL GENERATION
Title (de)
KOLBENPUMPE ZUR KRAFTSTOFFHOCHDRUCKERZEUGUNG
Title (fr)
POMPE A PISTON POUR CARBURANT SOUS HAUTE PRESSION
Publication
Application
Priority
- DE 9903643 W 19991116
- DE 19860672 A 19981229
Abstract (en)
[origin: DE19860672A1] High-pressure piston pump (6) with several pump elements (7) that is connected to a low-pressure flow-regulated pump (1) on the suction side. A first and a second check valve (10, 11) are connected in series to each pump element (7) on the suction side. The first check valve (10) opens against the force of a spring during the suction phase of the pump element (7) and closes during the delivery phase. The second check valve (11) opens against the force of a spring and closes assisted by the force of a spring when the fuel delivered by the pump (1) reaches pressures that are higher than the negative pressure generated in a cylinder chamber (9) of the pump element (7). The second check valve (11) regulates the amount of fuel delivered to the pump element (7). The first check valve (10) blocks the cylinder chamber (9) from the check valve (11) during the delivery phase. The piston pump ensures generation of high pressure fuel in fuel injection systems in internal combustion engines, especially in a common rail injection system.
IPC 1-7
IPC 8 full level
F02M 59/46 (2006.01); F02M 37/04 (2006.01); F02M 39/00 (2006.01); F02M 59/06 (2006.01); F02M 59/08 (2006.01); F04B 53/10 (2006.01)
CPC (source: EP US)
F02M 37/043 (2013.01 - EP US); F02M 39/005 (2013.01 - EP US); F02M 59/06 (2013.01 - EP US); F04B 53/1005 (2013.01 - EP US)
Citation (search report)
See references of WO 0039450A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DE 19860672 A1 20000713; DE 59911667 D1 20050331; EP 1141539 A1 20011010; EP 1141539 B1 20050223; JP 2002533612 A 20021008; US 6568927 B1 20030527; WO 0039450 A1 20000706; WO 0039450 A8 20000817
DOCDB simple family (application)
DE 19860672 A 19981229; DE 59911667 T 19991116; DE 9903643 W 19991116; EP 99963253 A 19991116; JP 2000591322 A 19991116; US 86952401 A 20010910