US 12,237,755 B2
Coolant supply for an electric vehicle axle drive
Ivo Greiter, Eitensheim (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 18/704,569
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Jul. 21, 2022, PCT No. PCT/EP2022/070475
§ 371(c)(1), (2) Date Apr. 25, 2024,
PCT Pub. No. WO2023/072442, PCT Pub. Date May 4, 2023.
Claims priority of application No. 10 2021 128 081.8 (DE), filed on Oct. 28, 2021.
Prior Publication US 2024/0333104 A1, Oct. 3, 2024
Int. Cl. H02K 9/193 (2006.01); H02K 7/00 (2006.01); H02K 7/116 (2006.01); H02K 9/197 (2006.01)
CPC H02K 9/193 (2013.01) [H02K 7/006 (2013.01); H02K 7/116 (2013.01); H02K 9/197 (2013.01); H02K 2209/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A coolant supply system for an electric vehicle axle drive comprising:
an electric machine configured to output to at least one vehicle wheel of the electric vehicle drive via a transmission arrangement;
an electric machine housing, wherein stator is configured to interact with a rotor, a coolant separator is arranged that divides an interior of the electric machine housing into a radially outer stator chamber and a radially inner rotor chamber, which is separated therefrom in a largely fluid-tight manner and in which the rotor is arranged, and the radially outer stator chamber has a drain point from which coolant flowing out of the radially outer stator chamber is configured to be returned to a coolant reservoir by a return pump, and a feed pump and the return pump are combined to form a common dual pump.