초록 ▼

The present invention relates to a piston pump, which is in particular appropriate for the pressure fluid delivery in electronically controlled brake systems, including a housing, a suction valve, a pressure valve, and a pump piston that is designed as a stepped piston having a large-diameter portio

The present invention relates to a piston pump, which is in particular appropriate for the pressure fluid delivery in electronically controlled brake systems, including a housing, a suction valve, a pressure valve, and a pump piston that is designed as a stepped piston having a large-diameter portion and a small-diameter portion. According to the present invention, the stepped piston at its large-diameter portion is guided in a pump cartridge. Preferably, the pressure valve is designed additionally at the cartridge in a radial direction relative to the direction of movement of the stepped piston.

대표청구항 ▼

1. Piston pump, in particular for the pressure fluid delivery in electronically controlled brake systems, comprising: a housing, a suction valve, a pressure valve, and a stepped piston having a large-diameter portion, and a small-diameter portion, wherein the stepped piston at its large-diamet

1. Piston pump, in particular for the pressure fluid delivery in electronically controlled brake systems, comprising: a housing, a suction valve, a pressure valve, and a stepped piston having a large-diameter portion, and a small-diameter portion, wherein the stepped piston at its large-diameter portion is guided in a pump cartridge, wherein the pump cartridge defines at least a portion of at least one suction channel extending substantially along the length of the pump cartridge and parallel to a direction of movement of the stepped piston guided therein and wherein the pump cartridge is in continuous, fluidic communication with the suction valve. 2. Piston pump as claimed in claim 1, wherein the pressure valve is provided at the pump cartridge and designed radially relative to a direction of movement of the stepped piston. 3. Piston pump as claimed in claim 1, wherein the pump cartridge is made of plastics or a sintered metals. 4. Piston pump as claimed in claim 1, the piston pump further comprising a suction channel, wherein a part of the suction channel is provided close to an outside edge of the pump housing. 5. Piston pump as claimed in claim 4, wherein a part of the suction channel extends through the stepped piston, and the suction valve is designed at the stepped piston. 6. Piston pump as claimed in claim 5, wherein a filter element is provided in the pump housing adjacent to the small-diameter portion of the stepped piston. 7. Piston pump as claimed in claim 1, wherein a seal and a wear-resistant element is provided in the pump housing adjacent to the small-diameter portion of the stepped piston. 8. Piston pump as claimed in claim 7, the piston pump further comprising a suction channel, wherein the seal and the wear-resistant element is retained in the housing by means of a filter element provided in the suction channel between the pump cartridge and the stepped piston. 9. Piston pump as claimed in claim 1, wherein the housing is closed towards the outside by means of a cover calked in the housing. 10. Piston pump as claimed in claim 9, wherein the cover is designed integrally with the pump cartridge.