Patent ID: 6837451
Filing Date: 2005-01-04
Classification: F02M,Y10T

Abstract:
1. A 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a control piston ( 44 ) guided in a housing ( 53 ), in which the control piston ( 44 ), in a first switching position, opens a hydraulic connection between an injector ( 7 ) and a fuel return ( 42 ), and in a second switching position the control piston ( 44 ) opens a hydraulic connection between the injector ( 7 ) and a high-pressure fuel reservoir ( 3 ), and means for force balancing the control piston ( 44 , 70 ), wherein the control piston ( 44 , 70 ) has two guides, with a larger guide diameter and a smaller guide diameter; wherein the control piston ( 44 , 70 ) has a control edge cooperating with the smaller guide diameter; wherein a blind bore ( 50 , 62 ) is embodied in the end, remote from the control edge, of the control piston ( 44 , 70 ); wherein the blind bore ( 50 , 62 ) can be subjected to pressure via a bore ( 51 ); and wherein a throttle is provided in the bore ( 51 ).