ELECTRIC DRIVE UNIT
First Claim
Patent Images
1. An electric drive unit for a motor vehicle, the electric drive unit comprising:
- an electric motor including a rotor and a stator; and
a lubrication and cooling circuit configured for circulation through the electric motor, the lubrication and cooling circuit having a first fluid which is flows through and contacts an internal area of the electric motor to thereby lubricate and cool the internal area.
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Accused Products
Abstract
An electric drive unit for a motor vehicle has an electric machine and a lubrication and cooling circuit. The lubrication and cooling circuit includes an aqueous lubricant, which is passed at least through an internal area of the electric machine, in order to cool parts of the electric machine in the internal area.
6 Citations
20 Claims
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1. An electric drive unit for a motor vehicle, the electric drive unit comprising:
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an electric motor including a rotor and a stator; and a lubrication and cooling circuit configured for circulation through the electric motor, the lubrication and cooling circuit having a first fluid which is flows through and contacts an internal area of the electric motor to thereby lubricate and cool the internal area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric drive unit for a motor vehicle, the electric drive unit comprising:
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an electric motor including a rotor, a stator, an inverter and a gearbox; a first fluid circuit configured to lubricate and cool a first predetermined area of the electric motor; and a second fluid circuit configured to cool a second predetermined area of the electric motor, wherein the second fluid circuit is operated at a lower temperature level than a temperature level of the first fluid circuit. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An electric drive unit for a motor vehicle, the electric drive unit comprising:
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an electric motor including a rotor, a stator, an inverter and a gearbox; a first fluid circuit configured to lubricate and cool the electric motor, the first fluid circuit comprising a first fluid circuit feed device which circulates a first fluid continuously through the first fluid circuit, and a first fluid/air heat exchanger; and a second fluid circuit configured to cool the electric motor, the second fluid circuit comprising a second fluid circuit feed device which circulates a second fluid continuously through the second fluid circuit, and a second fluid/air heat exchanger, wherein; the first fluid circuit extends continuously between the first fluid circuit feed device, at least one of the stator and the rotor, the first heat exchanger and the gearbox; and the second fluid circuit extends continuously between the second fluid circuit feed device, the second heat exchanger, the inverter, the first heat exchanger and the stator. - View Dependent Claims (19, 20)
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Specification