EP 1066466 A1 20010110 - HIGH-PRESSURE PISTON CYLINDER UNIT
Title (en)
HIGH-PRESSURE PISTON CYLINDER UNIT
Title (de)
HOCHDRUCK-KOLBENZYLINDEREINHEIT
Title (fr)
UNITE CYLINDRE-PISTON HAUTE PRESSION
Publication
Application
Priority
- DE 19813454 A 19980326
- DE 19820264 A 19980507
- EP 9902010 W 19990324
Abstract (en)
[origin: US6477940B1] The invention relates to a high-pressure piston cylinder unit, especially an injection pump or an injection valve for an internal combustion engine, and to a method for producing one such high-pressure piston cylinder unit. The high-pressure piston cylinder unit has a piston which is guided inside a cylinder bore and which is coupled to an actuating element. The piston is subjected to a high pressure differential. According to the invention, fine grooves which run very close to one another are configured in at least one part of the guiding surface of the piston. The grooves ensure hydraulic pressure compensation on the periphery of the guiding surface, thus reducing wear, and prevent leakage in a longitudinal guiding direction.
IPC 1-7
IPC 8 full level
F02M 47/02 (2006.01); F02M 59/44 (2006.01); F02M 61/12 (2006.01); F02M 61/16 (2006.01)
CPC (source: EP US)
F02M 47/027 (2013.01 - EP US); F02M 59/44 (2013.01 - EP US); F02M 59/442 (2013.01 - EP US); F02M 61/12 (2013.01 - EP US); F02M 61/16 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
WO 9949209 A1 19990930; AT E226279 T1 20021115; DE 59903092 D1 20021121; EP 1066466 A1 20010110; EP 1066466 B1 20021016; US 6477940 B1 20021112
DOCDB simple family (application)
EP 9902010 W 19990324; AT 99915701 T 19990324; DE 59903092 T 19990324; EP 99915701 A 19990324; US 64705801 A 20010105