Fuel injection valve
AssigneeRobert Bosch GmbH
InventorsWolfgang Ruehle, Hubert Stier, Matthias Boee, Guenther Hohl, Norbert Keim
Life of this patent
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Abstract
A fuel injection valve, especially an injection valve for fuel injection systems of internal combustion engines, includes a piezoelectric or magnetostrictive actuator and a valve-closure member, which can be actuated by an actuator via a valve needle and interacts with a valve-seat surface to form a sealing seat. An intermediate piece is connected via a first flexible seal to a support plate; the support plate is connected via a second flexible seal to a driver at the valve needle; and the driver is connected via a third flexible seal to the intermediate piece, thereby creating a sealed hydraulic translation device.
Claims10
A fuel injection valve comprising:
- a valve-seat surface;
- a valve-closure member interacting with the valve-seat surface to form a sealing seat;
- a valve needle;
- an intermediate piece;
- an actuator for actuating the valve-closure member via the valve needle and for actuating the intermediate piece, the actuator being one of piezoelectric and magnetostrictive;
- a driver for actuating the valve needle;
- a support plate;
- a first flexible seal connecting the intermediate piece to the support plate;
- a second flexible seal connecting the support plate to the driver;
- and
- a third flexible seal connecting the driver to the intermediate piece.
Dependencies are inferred from the claim text.