Patent ID: 8459232

Claim:
An injection system for injecting fuel at a predetermined fuel pressure, said injection system having a high-pressure zone which is exposed to the fuel pressure and a low-pressure zone, and comprising: a) a controllable actuator that provides a working stroke for indirectly actuating a valve pin which opens and closes a nozzle in an opening direction or in a closing direction; b) a pilot valve which is arranged in a valve chamber of the high-pressure zone and which has a valve mushroom and opens or closes as a function of the working stroke that is provided; c) a supply throttle that is disposed between a high-pressure connection and a control chamber of the high-pressure zone in order to supply the fuel, said control chamber containing a control piston; d) a first discharge throttle located between the control chamber and the valve chamber; e) a first sealing edge of the valve chamber, said first sealing edge embodying a first sealing seat in conjunction with the valve mushroom when the nozzle is closed, in order to seal the piston chamber and the valve chamber from each other; f) a second sealing edge of a piston chamber that has a valve piston, said second sealing edge embodying a second sealing seat in conjunction with the valve piston during a maximum working stroke of the actuator, in order to at least substantially seal the piston chamber and the valve chamber from each other; g) a second discharge throttle that connects the piston chamber to the low-pressure zone between the first and the second sealing edge; h) wherein d 1 >d 2 >d 3 , where d 1 denotes the minimum diameter of the first discharge throttle, d 2 denotes the minimum diameter of the second discharge throttle, and d 3 denotes the minimum diameter of the supply throttle.