Patent ID: 7090151
Filing Date: 2006-08-15
Classification: F02M,F16K

Abstract:
1. In a device for actuating a control piston or nozzle needle ( 27 ), via a control chamber ( 26 ), which communicates via a control chamber line ( 25 ) with valve chambers ( 3 , 22 ) of a 3/2-way valve ( 5 ), whose valve body ( 6 , 40 , 51 ) is switchable by means of an actuator ( 11 ) and is moreover acted upon by pressure by means of a restoring spring ( 14 ), and a seat portion ( 7 ) in the housing ( 4 ) embodied on the valve body ( 6 , 40 , 51 ) is put into its valve seat ( 20 ), the improvement wherein the valve body ( 6 , 40 , 51 ) of the 3/2-way valve ( 5 ) comprises a seat portion ( 7 ), a longitudinal slide portion ( 8 ), and opposing faces ( 31 , 32 ) on the valve body which make the state of pressure equilibrium of the valve body ( 6 , 40 , 51 ) possible, the actuator ( 11 ) being operable to move the valve body ( 6 , 40 , 51 ), different stroke lengths ( 10 . 1 , 10 . 2 ; 23 , 24 ).