EP 0151562 A2 19850814 - Fuel injector.
Title (en)
Fuel injector.
Title (de)
Kraftstoffeinspritzdüse.
Title (fr)
Injecteur de carburant.
Publication
Application
Priority
AT 19884 A 19840120
Abstract (en)
1. Fuel injection nozzle comprising a valve member which is urged against a valve seat in a valve chamber by means of a valve member spring (14) and the end of which remote from the valve seat extends into a chamber (15) that can be filled with fuel and accommodates the valve member spring (14), and a solenoid valve (8) for controlling the injection which in its open position connects the pressure chamber (9) of an injection pump with a spill conduit, characterised in that in a pumping chamber (31) of the fuel injection nozzle a plunger (13) is provided, and the pumping chamber (31) is connected to a conduit leading from the pressure chamber (9) of the injection nozzle to the valve chamber, and the end of the plunger (13) extending remotely from the pumping chamber rests upon the valve member spring (14), that the fuel pressure in said conduit acts upon the other end of the plunger (13), that the active cross-sectional area of the plunger (13) is greater than the cross-sectional area of the valve member, and that within the whole range of speed and load the plunger (13) performs its working stroke against the force of the spring before, at the beginning of the injection, the valve member is being lifted.
Abstract (de)
Die Kraftstoffeinspritzdüse (1) weist eine Düsennadel auf, deren dem Nadelsitz abgewendetes Ende in einen, eine Düsennadelfeder (14) aufnehmenden Raum (15) eintaucht. Es ist ein elektromagnetisches Ventil (8) vorgesehen, dessen Steuerschieber (7) in geöffneter Stellung den Düsennadelraum oder den Pumpendruckraum (9) mit der Rücklaufleitung bzw. dem Saugraum (8) der Pumpe verbindet. Es ist weiters ein Kolben (13) vorgesehen, welcher einseitig mit dem Pumpendruck beaufschlagt und an der anderen Seite gegen die Düsennadelfeder (14) abgestützt ist.
IPC 1-7
IPC 8 full level
F02M 47/00 (2006.01); F02M 57/02 (2006.01); F02M 59/36 (2006.01); F02M 59/46 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02M 57/02 (2013.01); F02M 57/023 (2013.01); F02M 59/366 (2013.01); F02M 59/462 (2013.01)
Designated contracting state (EPC)
AT DE FR GB
DOCDB simple family (publication)
EP 0151562 A2 19850814; EP 0151562 A3 19851127; EP 0151562 B1 19891011; AT 397129 B 19940225; AT A19884 A 19930615; AT E47202 T1 19891015; DE 3573638 D1 19891116
DOCDB simple family (application)
EP 85890012 A 19850118; AT 19884 A 19840120; AT 85890012 T 19850118; DE 3573638 T 19850118