Automotive electric liquid pump

An automotive electric liquid pump for providing a pressurized pumping liquid, the automotive electric liquid pump comprising:

• a positive displacement pumping section comprising a pump rotor which is arranged within a pump chamber which is substantially defined by a pump main housing;
• a motor section which is arranged in an axial alignment with the positive displacement pumping section, the motor section comprising,
• a dry electromagnetic motor stator,
• a motor control electronics which is configured to drive the dry electromagnetic motor stator, and
• a wet permanently-magnetized motor rotor which is separated from the dry electromagnetic motor stator via a separation wall which is substantially cylindrical;
• an internal electronics cooling circuit which is configured to actively cool the motor control electronics with the pressurized pumping liquid;
• a rotor shaft which is configured to co-rotatably support the pump rotor and the wet permanently-magnetized motor rotor, the rotor shaft being arranged as an axial liquid pipe comprising a motor-sided axial shaft opening and a pump-sided shaft axial opening, the axial liquid pipe being a part of the internal electronics cooling circuit;
• and
• a separate axial pump cover housing part which is axially mounted to the pump main housing and which comprises a proximal throttle groove which provides a fluid connection between the pump-sided shaft axial opening and a static low-pressure pump inlet chamber or with a static high-pressure pump outlet chamber.