An electric vehicle drive assembly 12, comprising: a housing 16 defining a cavity 18 to house the electric drive unit motor 14; and a breather spigot 20, extending through the housing 16, having a bore 22 in fluid communication with the cavity 18. The breather may extend into the cavity, perhaps by 2 to 4mm, and may have an end portion which is circumferentially discontinuous (24, Fig. 2). A portion 26 of the first cavity may surround a stator end winding 28, and the spigot may extend into that cavity portion 26, perhaps with a minimum distance of at least 5 mm between the breather and the stator end winding. The breather may have a bore 22 diameter of 3 to 5mm, and may be sealed to the housing using an o-ring 30 or sealant. A powertrain assembly 10 may comprise: an electric drive assembly 12 with a motor 14 and a breather 20; a transmission 32; and a second housing 34 defining a second cavity 36 to house the transmission. There may be oil spray outlets 44 or nozzles in the second cavity for the transmission.
Electric drive unit assembly
11.06.2025
Patent
Elektronische Ressource
Englisch