Patent ID: 8302888
Filing Date: 2012-11-06
Classification: F02M

Abstract:
1. A fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine, comprising: a multi-part injection valve element, which is adjustable between a closing position and an opening position and which includes a first part and at least one second part that is adjustable relative to the first part; a hydraulic coupler volume, in which the first part and the at least one second part are coupled to one another, with the first part being guided in a guide of the second part, or the second part being guided in a guide the first part; wherein the first part is a control piston that defines a control chamber at one end and said coupler volume at an opposite end, and the second part is a nozzle needle cooperating with a nozzle needle seat; and an injector volume which communicates with the coupler volume via at least one throttle arrangement which is embodied such that a volumetric through flow increases non-linearly with an increasing pressure difference between the coupler volume and the injector volume.