Pump exhibiting an adjustable delivery volume

A pump which exhibits an adjustable delivery volume, the pump comprising:

• (a) a pump housing comprising a delivery chamber which comprises a delivery chamber inlet on a low-pressure side of the pump, and a delivery chamber outlet on a high-pressure side of the pump, for a fluid;
• (b) a delivery rotor which can be rotated about a rotary axis within the delivery chamber, for delivering the fluid;
• (c) an adjusting device, comprising:
• (c1) an adjusting member which can be adjusted back and forth in the pump housing in a setting direction and a restoring direction in order to adjust the delivery volume of the pump;
• (c2) a first setting chamber for generating a first setting pressure for adjusting the adjusting member in the setting direction;
• (c3) and a second setting chamber for generating a second setting pressure for adjusting the adjusting member in the setting direction;
• (d) a restoring device, arranged in the pump housing, for generating a restoring force which acts on the adjusting member in the restoring direction;
• (e) a fluidically operable valve for adjusting the setting pressure of the first setting chamber, the fluidically operable valve comprising:
• a pressure port for a setting fluid which is diverted from the fluid of the high-pressure side;
• a working port, connected to the first setting chamber, for the setting fluid;
• and a relief port for the setting fluid;
• (f) and an electromagnetic valve, comprising:
• a pressure port for a setting fluid which is diverted from the high-pressure side;
• and a relief port for the setting fluid,
• (g) wherein the electromagnetic valve comprises a working port for the setting fluid, which is connected to the second setting chamber, in order to adjust the setting pressure of the second setting chamber.