Hydraulic lift translation system
OwnerPatrick Mattesinventor
Life of this patent
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Abstract
In a hydraulic stroke step-up system, in particular for an injection nozzle of a fuel injection system, having a base body (10), an inlet piston (24), a coupling chamber (38) which is filled with a hydraulic fluid, and an outlet piston (14), reliable ventilation of the coupling chamber on the one hand and a loss-free conversion of a motion of the inlet piston into a motion of the outlet piston on the other are to be assured. To this end, an intermediate piston (20) is provided, which is displaceable between a position of repose, in which the coupling chamber is closed from the outside by a ventilation opening (40), and a working position in which the ventilation opening and thus the coupling chamber are closed.
Claims10
A hydraulic stroke step-up system, in particular for an injection nozzle of a fuel injection system, having a base body (10), an inlet piston (24), a coupling chamber (38) which is filled with a hydraulic fluid, and an outlet piston (14),
- characterized in that an intermediate piston (20) is provided, which is displaceable between a position of repose, in which the coupling chamber is closed from the outside by a ventilation opening (40), and a working position in which the ventilation opening and thus the coupling chamber are closed.
The hydraulic stroke step-up system of one of the foregoing claims, characterized in that the intermediate piston (20) is provided with a sealing face (32), and the base body (10) is provided with a sealing seat (34) for the sealing face, and that the ventilation opening (40) is formed by an annular gap, which is formed between the sealing face and the sealing seat in the outset position of the intermediate piston (20).
The hydraulic stroke step-up system of one of the foregoing claims, characterized in that the intermediate piston (20) is connected to the inlet piston (24) by a spring (28).
The hydraulic stroke step-up system of one of the foregoing claims, characterized in that the intermediate piston (20) is connected to the base body (10) by a spring (30).
The hydraulic stroke step-up system of one of the foregoing claims, characterized in that the outlet piston (14) is connected to the base body (10) by a spring (16).
Dependencies are inferred from the claim text.