Patent ID: 7083113
Filing Date: 2006-08-01
Classification: F02M

Abstract:
1. In a fuel injection apparatus for injecting fuel into the combustion chambers ( 7 ) of an internal combustion engine, having a high pressure source ( 2 ), a pressure booster ( 5 ), and a metering valve ( 6 , 56 ), wherein the pressure booster ( 5 ) includes a working chamber ( 10 ) and a control chamber ( 11 ) that are separated from each other by a piston ( 12 , 13 , 14 ) and wherein a pressure change in the control chamber ( 11 ) of the pressure booster ( 5 ) produces a pressure change in a compression chamber ( 15 ), which acts on a nozzle chamber ( 22 ) via a fuel inlet ( 21 ), which nozzle chamber ( 22 ) encompasses an injection valve element ( 29 ), the improvement comprising a nozzle control chamber ( 25 ) that acts on the injection valve element ( 29 ) and can be filled on the high-pressure side via a line ( 23 ) leading from the compression chamber 15 and containing an inlet throttle restriction ( 24 ) and said nozzle control chamber ( 25 ) being connected on the outlet side to a chamber ( 10 , 11 ) of the pressure booster ( 5 ) via a line ( 26 , 40 ) containing an outlet throttle restriction ( 27 ).