EP 0976924 B1 20030917 - Injector with a servo valve
Title (en)
Injector with a servo valve
Title (de)
Einspritzventil mit einem Servoventil
Title (fr)
Injecteur avec une servovalve
Publication
Application
Priority
DE 19834667 A 19980731
Abstract (en)
[origin: EP0976924A2] The servo valve is used for the fuel injection valve of an internal combustion engine. There is a control space (4) above a piston (6) which is connected to the fuel injector needle. The contact space is connected with a second space (20) via a first throttle channel (3). A high-pressure bore (1) is connected to the second space via a wide access bore. Fuel may leave the control space via a bore (9) leading to a second throttle bore. There is a valve body (26) moved by a pushrod (16) attached to a piezoelectric actuator (18). The valve body is hemispherical and its flat surface may seal against a flat surface (24) at the end of the metal block containing the second space. The hemispherical surface is surrounded by a valve chamber (22) and when the valve body is in its upper position it engages a valve seat (28) to block off return flow to the fuel supply.
IPC 1-7
IPC 8 full level
F02M 47/02 (2006.01); F02M 59/46 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02M 47/027 (2013.01); F02M 63/0026 (2013.01); F02M 63/0036 (2013.01); F02M 63/0045 (2013.01)
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
EP 0976924 A2 20000202; EP 0976924 A3 20010613; EP 0976924 B1 20030917; DE 59906995 D1 20031023
DOCDB simple family (application)
EP 99112980 A 19990705; DE 59906995 T 19990705