Coolant pump for the automotive industry

A coolant pump for the automotive industry, the coolant pump comprising:

• a conveying channel;
• a drive shaft;
• a coolant pump impeller arranged on the drive shaft so as to rotate jointly therewith, the coolant pump impeller being configured to convey a coolant into the conveying channel which surrounds the coolant pump impeller;
• a control slide which is configured to be movable so as to control a flow cross-section of an annular gap arranged between an exit of the coolant pump impeller and the conveying channel, the control slide comprising a first pressure chamber;
• a side channel pump comprising a side channel pump impeller arranged on the drive shaft so as to rotate jointly therewith, and a side channel which is configured so that a pressure can be generated by a rotation of the side channel pump impeller, the side channel comprising an inlet and an outlet;
• a pressure channel comprising a flow cross section, the pressure channel being configured to fluidically connect the outlet of the side channel to the first pressure chamber of the control slide;
• a valve configured to close the flow cross-section of the pressure channel;
• a second pressure chamber arranged on a side of the control slide facing the coolant pump impeller;
• and
• a connection channel arranged from the side channel into the second pressure chamber between the inlet and the outlet.