Electric drive axle system and operating method
AssigneeDana Heavy Vehicle Systems Group, LLC
InventorsJeffrey M. David, Mark A. Davis, Darren J. Ziskovsky, Aaron D. Gries, Jordan M. Houser
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Abstract
Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.
Claims20
An electric drive system, comprising:
- a first multi-motor drive unit including a first planetary gear reduction that transfers power between a first pair of motors and a first set of axle shafts;
- and
- a second multi-motor drive unit including a second planetary gear reduction that transfers power between a second pair of motors and a second set of axle shafts;
- wherein the first and second multi-motor drive units have asymmetric gear ratios.
An electric axle system, comprising:
- a first dual-motor drive unit including a first planetary gear reduction that receives power from a first pair of motors through a ring and a sun gear and delivers power to a first set of axle shafts via a carrier;
- and
- a second dual-motor drive unit including a second planetary gear reduction that receives power from a second pair of motors through a ring and a sun gear and delivers power to a second set of axle shafts via a carrier;
- wherein the first dual-motor drive unit has a greater gear ratio than the second dual-motor drive unit.
Dependencies are inferred from the claim text.