Piston pump, in particular high-pressure fuel pump for internal combustion engine

The invention relates to a piston pump (16), in particular a high-pressure fuel pump for an internal combustion engine, comprising a pump housing (26), a pump piston (28) which is guided in the pump housing (26), and a delivery chamber (38) which is delimited at least by the pump housing (26) and the pump piston (28), a seal (43) being arranged on the periphery of the pump piston (28) for sealing the delivery chamber (38), characterized in that the seal (43) is arranged in the delivery chamber (38). According to the invention, the seal (43) is designed as a sealing ring (44) having a substantially sleeve-shaped base section (45) extending along a central longitudinal axis (41), the sealing ring (44) being made of a fiber-reinforced plastic, the fibers (49) of which are oriented in the circumferential direction (51) of the sealing ring (44) at least along a majority of the circumference of the sealing ring (44). 本发明涉及一种活塞泵(16)、尤其是用于内燃机的燃料高压泵，具有泵壳体(26)、在所述泵壳体(26)中被引导的泵活塞(28)和至少被所述泵壳体(26)和所述泵活塞(28)限界的输送室(38)，其中，