US 12,244,212 B2
Coolant supply system for an electrically operated vehicle axle
Andreas Weber, Ingolstadt (DE); Ivo Greiter, Eitensheim (DE); Harald Gloede, Pförring (DE); Herbert Tschentscher, Riedenburg (DE); and Frank Röthlingshöfer, Ingolstadt (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 18/703,793
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Oct. 13, 2022, PCT No. PCT/EP2022/078503
§ 371(c)(1), (2) Date Apr. 23, 2024,
PCT Pub. No. WO2023/072606, PCT Pub. Date May 4, 2023.
Claims priority of application No. 102021128068.0 (DE), filed on Oct. 28, 2021.
Prior Publication US 2024/0333103 A1, Oct. 3, 2024
Int. Cl. H02K 9/193 (2006.01); H02K 7/00 (2006.01); H02K 9/197 (2006.01)
CPC H02K 9/193 (2013.01) [H02K 7/006 (2013.01); H02K 9/197 (2013.01); H02K 2209/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A coolant supply system for a drive device of an electrically operated vehicle axle of a two-track vehicle with an electric machine, comprising: an electric machine hydraulic circuit in which the interior of a cylindrical stator housing and a stator housing sump are integrated, in which the coolant draining from the stator housing collects, which is returned from there to a coolant tank by a plurality of return pumps, wherein the stator housing sump at each of its axially opposite axial sides has a suction point at which the coolant is sucked off, wherein the coolant is sucked off by action of a first return pump in the plurality of return pumps on a first side and by action of a second return pump in the plurality of return pumps on an opposite side, wherein an output of the plurality of return pumps is combined prior to flow of the coolant into the coolant tank, and a drain opening is formed on each stator housing axial side on the stator housing bottom, via which the coolant is drained from a respective winding head space into the stator housing sump.