Abstract: A fluid injector has a housing, an actuator and a valve body. The valve body has a cartridge (21) with a recess, that forms an injection nozzle on one end, and with a needle (22), that is arranged in the recess and closes the injection nozzle, if it rests with its seat area (224) on a needle seat (215) of the cartridge (21). The area (216) of the cartridge (21) adjacent to the needle seat (215) has a cylindrically-shaped outer contour and the needle (22) has a cylindrically-shaped area (223) adjacent to the seat area (224). The area (216) adjacent to the needle seat (215) and the cylindrically-shaped area (223) have the same diameter.

Abstract: A fluid injector has a housing, an actuator and a valve body. The valve body has a cartridge (21) with a recess, that forms an injection nozzle on one end, and with a needle (22), that is arranged in the recess and closes the injection nozzle, if it rests with its seat area (224) on a needle seat (215) of the cartridge (21). The area (216) of the cartridge (21) adjacent to the needle seat (215) has a cylindrically-shaped outer contour and the needle (22) has a cylindrically-shaped area (223) adjacent to the seat area (224). The area (216) adjacent to the needle seat (215) and the cylindrically-shaped area (223) have the same diameter.

Abstract: The invention relates to a metering device for dosing pressurized fluids, comprising a housing with a metering opening, controlled an axially moveable valve needle, an axially extendable piezoelectric actuator, a thermal compensator unit, and an electrical connector for supplying electrical power to the piezoelectric actuator.

Abstract: The invention relates to a terminal adapter (34) for an electrical connector (30) supplying electrical power to a piezoelectric actuator (18) in a high pressure fuel injector (10), in which the axially extendable piezoelectric actuator (18) controls the axial movement of a valve needle (26) to open and close a metering opening of the injector (10). According to the invention, the terminal adapter (34) comprises a set of adapter pins (36) each of which has a first end piece and a second end piece, wherein the first end pieces provide electrical contact to the piezoelectric actuator (18) and the second end pieces are adapted to be connected with an external power supply, and wherein the second end pieces have a flexible bending area allowing axial extensions of the adapter pins.

Abstract: The invention relates to a metering device for dosing pressurized fluids, comprising a housing with a metering opening, controlled an axially moveable valve needle, an axially extendable piezoelectric actuator, a thermal compensator unit, and an electrical connector for supplying electrical power to the piezoelectric actuator.