US 6,474,565 B1Granted

Fuel injection valve

AssigneeRobert Bosch GmbH

InventorsWolfgang Ruehle, Hubert Stier, Matthias Boee, Guenther Hohl, Norbert Keim

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Abstract

A fuel injector (1), particularly an injection valve for fuel-injection systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator (16) that is arranged in a valve housing (2) and is sealed off from a fuel by an actuator housing (15), and a valve-closure member (7) which is operable by the actuator (16) with the aid of a valve needle (6) and which cooperates with a valve-seat surface (5) to form a sealing seat. The valve housing (2) and the actuator housing (15) have cut-outs (38, 39) adjoining one another, and the valve housing (2) is joined to the actuator housing (15) in an edge area of the cut-outs (38, 39). In this manner, a feed-through opening (41) is formed which is sealed off from the fuel. The feed-through opening (41) is filled with a filler element (43) by which at least one electrical supply line (37) of the actuator (16) is fixed in position in the feed-through opening (41).

Claims12

Dependent claims

A fuel injector, comprising:

an actuator housing;
a valve housing;
one of a piezoelectric actuator and a magnetostrictive actuator arranged in the valve housing and being sealed off from a fuel by the actuator housing;
a valve needle;
a valve seat surface;
a valve-closure member that is operable by the one of the piezoelectric actuator and the magnetostrictive actuator in accordance with an operation of the valve needle, the valve-closure member cooperating with the valve-seat surface to form a sealing seat;
and
a filler element, wherein:
the valve housing and the actuator housing include cut-outs adjoining one another,
the valve housing is joined to the actuator housing in an edge area of the cut-outs, thereby forming a feed-through opening sealed off from the fuel, and
the feed-through opening is filled with the filler element by which at least one electrical supply line of the one of the piezoelectric actuator and the magnetostrictive actuator is fixed in position in the feed-through opening.

8 more elements

Dependencies are inferred from the claim text.