Robert Boschgmbh

Tobias Schenk

Heiko Jahn

Soeren Stritzel

Oliver Albrecht

Viktor Schretling

A diaphragm cell for damping pressure pulsations in a low-pressure region of a piston pump has two axially deformable diaphragms that are connected along their radial peripheries and enclose a gas space. The diaphragms each have a central region that extends over no less than 50% of the cross-sectional surface area of the diaphragms. The diaphragms are of undulating shape in the central region, which is curved axially outwards in its radially inner region and in its radially outer region. The diaphragms further include an axially inwardly curved annular region that is arranged between and immediately adjacent to the radially inner region and the radially outer region. An axially-measured amplitude of the wave shape has a predetermined range related to the cross-sectional surface area of the diaphragms when the pressure difference is zero. The pressure difference is a pressure in the gas space minus a pressure outside the gas space.

Diaphragm cell for damping pressure pulsations in a low-pressure region of a piston pump

A plunger fuel pump for an internal combustion engine includes a pump cylinder and a pump plunger that is axially displaceable in the pump cylinder. The plunger fuel pump has a seal with an annular basic structure arranged around the circumference of the pump plunger. The seal is produced by injection molding in an axial injection direction.

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Marbach am Neckar, Germany

Tobias Schenk