EP 1722098 A4 20100120 - FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINE
Title (en)
FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINE
Title (de)
KRAFTSTOFFEINSPRITZPUMPE FÜR VERBRENNUNGSMOTOR
Title (fr)
POMPE INJECTION DE CARBURANT POUR MOTEUR COMBUSTION INTERNE
Publication
Application
Priority
- JP 2005003664 W 20050225
- JP 2004061643 A 20040305
Abstract (en)
[origin: EP1722098A1] In a fuel injection pump (1) which is constituted so as to control incoming and outgoing of fuel to a suction-and-overflow hole (8) in which an early stage control groove (10) is formed with an upper-side control edge portion (11) and a lower-side control edge portion (12) of a pump plunger (4) reciprocating in the inside of a pump plunger bushing (3), a suction-and-overflow hole (8) includes a small-diameter hole (81) having an opening surface (14) to observe the inside of the pump plunger bushing (3) and a large-diameter hole (82) which is communicated with another end (81B) of the small-diameter hole (81), and a bottom portion (10A) of the early stage control groove (10) extends in an upwardly inclined manner in the direction away from the opening surface (14), and an inner surface of a communicating end portion of the large-diameter hole (82) with the small-diameter hole (81) is formed into a spherical surface portion (82C). The high-pressure fuel which is fed to the inside of the large-diameter hole (82) can ensure a large distance between the fed high-pressure fuel and a wall surface of the large-diameter hole (82) due to a spherical surface portion (82C) of the large-diameter hole (82) thus reducing a cavitation erosion effect.
IPC 8 full level
F02M 59/26 (2006.01)
CPC (source: EP KR)
F02M 59/20 (2013.01 - KR); F02M 59/26 (2013.01 - KR); F02M 59/265 (2013.01 - EP); F04B 1/0408 (2013.01 - EP); F04B 11/0091 (2013.01 - EP)
Citation (search report)
- [Y] EP 0372211 A1 19900613 - BOSCH GMBH ROBERT [DE]
- [Y] GB 1208635 A 19701014 - BOSCH GMBH ROBERT [DE]
- See references of WO 2005085626A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1722098 A1 20061115; EP 1722098 A4 20100120; CN 100443715 C 20081217; CN 1961146 A 20070509; JP 2005248876 A 20050915; JP 4098738 B2 20080611; KR 100781915 B1 20071204; KR 20060122975 A 20061130; WO 2005085626 A1 20050915
DOCDB simple family (application)
EP 05719961 A 20050225; CN 200580007060 A 20050225; JP 2004061643 A 20040305; JP 2005003664 W 20050225; KR 20067020440 A 20060929