Needle guide body for injector of fuel injection system embodied as electrically insulating ceramic body with axial hole in which is metal casing forming guide for needle; bonding device for same; injector with bonding device

摘要

In order to achieve an electrical insulation bonding (8) of a valve needle (6) from its outer surface, the needle guide body (2) is embodied as an electrically insulating ceramic body with an axially bored hole in which is a metal casing (7) which forms a needle guide for the valve needle. The electrical insulation bonding leads through the insulating material of the needle guide body right through to the casing.