Fluid dosing device for measuring fuel in combustion chamber of cylinder of internal-combustion engine i.e. diesel internal-combustion engine, has nozzle needle coupled with control piston and stopping fluid flow via injection nozzle

摘要

The device has a nozzle needle (39) coupled with a control piston (37) in its closing position and stops the fluid flow through an injection nozzle (41) in the closing position and enables the fluid flow through the injection nozzle outside of the closing position. A stop unit (44) is arranged in a housing with respect to an axis of the nozzle needle. A nozzle spring is supported on a supporting point of the stop unit, which is supported axially on an outlet of the nozzle needle and is in contact with a housing-sided stop in the opening position of the needle.