EP 0419612 B1 19940803 - FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES.
Title (en)
FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES.
Title (de)
KRAFTSTOFFEINSPRITZPUMPE FÜR BRENNKRAFTMASCHINEN.
Title (fr)
POMPE A INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE.
Publication
Application
Priority
- DE 3912624 A 19890418
- DE 9000235 W 19900323
Abstract (en)
[origin: WO9012957A1] To ensure a very rapid increase in pressure inside a fuel injection pump for internal combustion engines, a pressure-control valve which controls this pressure is modified so that it is closed from the beginning when the internal combustion engine is started from the cold. To this end, the rear face of a control piston (17) of the pressure control valve (16) is acted on by a restoring spring (22) whose other point of support is an adjustable limit stop (23) which is acted on by the increasing pressure in the fuel injection pump, thereby preloading the restoring spring (22). This causes an outlet choke (46) controlled by the control piston (17) to close, so that all the fuel delivered by a feed pump (10) remains inside the pump chamber and contributes to the increase in pressure. This pressure results in very rapid adjustment of an injection adjustment piston (4), ensuring an early start of fuel injection which facilitates cold start and warm up.
IPC 1-7
IPC 8 full level
F02D 1/18 (2006.01); F02M 41/12 (2006.01)
CPC (source: EP US)
F02D 1/183 (2013.01 - EP US); F02M 41/128 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9012957 A1 19901101; DE 3912624 A1 19901025; DE 59006681 D1 19940908; EP 0419612 A1 19910403; EP 0419612 B1 19940803; JP 2895218 B2 19990524; JP H03505477 A 19911128; US 5085196 A 19920204
DOCDB simple family (application)
DE 9000235 W 19900323; DE 3912624 A 19890418; DE 59006681 T 19900323; EP 90904766 A 19900323; JP 50471590 A 19900323; US 62392890 A 19901218