Pressure booster with stroke-dependent damping
OwnerChristian Grimmiger, Andreas Kellnerinventors
Life of this patent
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Abstract
A pressure booster for a fuel injection device, with a piston-shaped pressure boosting element accommodated in a housing and dividing a working chamber from a differential pressure chamber. A control line connects the differential pressure chamber to a high-pressure source or pressure-relieves it into a low-pressure region. A return spring acts on the piston-shaped pressure boosting element and rests against an annular insert inside the housing. The insert has a damper throttle via which fuel flows from the working chamber of the pressure booster into a hydraulic chamber when the pressure in the differential pressure chamber is relieved.
Claims13
1-12. (canceled)
A pressure booster for a fuel injection device, comprising
- a piston-shaped pressure boosting element (5) that is accommodated in a housing (10) and divides a working chamber (2) and a differential pressure chamber (6) from each other,
- a control line (7) connecting the differential pressure chamber (6) to a high-pressure source or to pressure-relieve it into a low-pressure region,
- an annular insert (15) in the housing (10),
- a return spring (13) acting on the piston-shaped pressure boosting element (5), the return spring (13) resting against the annular insert (15), and
- a damping throttle (24) in the insert (15, 35) via which fuel flows from the working chamber (2) of the pressure booster (1) into a hydraulic chamber (22) when the pressure in the differential pressure chamber (6) is relieved.
Dependencies are inferred from the claim text.