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AssigneeContinental Teves AG & Co. oHG
InventorsStephan Krebs, Jens Bacher, Heinrich Kreh, Lazar Milisic, Michael Jürging, Marcel Niepenberg, Jose Gonzalez, Karlheinz Seitz, Hans-Michael Koppel, Falk Petzold, Rolf Fellinger, Stefan Imhof, Thomas Oeffner, Paul Wiebe, Manfred Rüffer
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The invention relates to a pump unit that can be driven by an electric motor, in particular for providing vacuum for a pneumatic brake booster, including a pump housing that can be closed by a working-chamber cover and at least one elastic displacement element, wherein a working chamber is bounded between the displacement element and the working-chamber cover and wherein inlet valves and outlet valves and inlet channels and outlet channels associated with the valves are associated with the working chamber. According to the invention, in order to reduce noise emissions, devices for reducing a contact surface between the working-chamber cover and the pump housing are provided.
A pump unit that can be driven by electric motor, for the generation of negative pressure for a pneumatic brake force booster, comprising a pump housing that can be closed off by a working chamber cover and comprising at least one elastic displacement element, wherein a working chamber is delimited between the displacement element and the working chamber cover, and said working chamber is assigned in each case inlet and outlet valves and inlet and outlet ducts assigned to the valves, and means for reducing an area of contact between the working chamber cover and the pump housing.
A pump unit that can be driven by electric motor, for the generation of negative pressure for a pneumatic brake force booster, comprising a pump housing that can be closed off by a working chamber cover and comprising at least one elastic displacement element, wherein the working chamber cover has a top cover and a bottom cover, and wherein a working chamber is delimited between the displacement element and the working chamber cover, and said working chamber is assigned in each case inlet and outlet valves and inlet and outlet ducts assigned to the valves, wherein the inlet and outlet ducts are at least partially surrounded by the top cover, and a length of an outer contour of the top cover is significantly smaller than a length of an outer contour of the bottom cover.
Dependencies are inferred from the claim text.