Fuel injection valve
AssigneeRobert Bosch GmbH
InventorGuenther Hohl
Life of this patent
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Abstract
A fuel injector, especially for the direct injection of fuel into the combustion chamber of a mixture-compressing internal combustion engine having externally supplied ignition, comprising a swirl disk having swirl channels and a central recess, and having a guide compensator inserted into the recess whose center axis is able to be inclined relative to the center axis of the fuel injector and which has a sealing fit with respect to the valve needle. Formed by a sealing-seat surface, disposed in the swirl disk, and a radial widening of the guide compensator is a sealing seat which tolerates an excursion of the center axis, preventing a swirl-free leakage flow in the same manner as the sealing fit between the valve needle and the guide compensator.
Claims8
A fuel injector for fuel-injection systems of internal combustion engines, comprising:
- a valve-seat member including a valve-seat surface and a valve-closure member configured to cooperate with the valve-seat surface to form a first sealing seat;
- a swirl disk including a central recess, the valve-closure member penetrating the recess;
- a sealing seat surface arranged adjacent to the swirl disk;
- a valve needle connected to the valve-closure member and including at least one swirl channel arranged upstream from the valve-seat surface, the swirl channel configured to generate a swirl in a fuel to be sprayed off by the fuel injector;
- and
- a guide compensator insertable into the central recess of the swirl disk, the guide compensator including a central recess to guide the valve needle, and a radial widening at a downstream end of the guide compensator which cooperates with the sealing-seat surface to form a second sealing seat.
Dependencies are inferred from the claim text.