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US 12,473,970 B2Granted
Electric drive arrangement for a vehicle
AssigneeGKN Automotive AG
InventorsTheodor Gassmann, Ian Stone, John Foulsham, Daniel Beeby
Life of this patent
Estimating the term…
Abstract
An electric drive arrangement for a vehicle includes a housing, an electric machine, a transmission, and a hydraulic circuit for circulating a fluid to cool and lubricate the electric machine and the transmission.
Claims16
An electric drive arrangement for a vehicle, comprising:
- a housing;
- an electric machine with a stator connected to the housing and including stator end-windings, and a rotor with a rotor shaft rotatably supported in the housing;
- a transmission to transmit a rotary movement from the rotor shaft to drive a driveline of the vehicle;
- and
- a hydraulic circuit for circulating a fluid to cool and lubricate the electric machine and the transmission, the hydraulic circuit comprising:
- an oil sump formed in a lower portion of the housing,
- a reservoir arranged above the oil sump, wherein the reservoir is configured to temporarily store and feed oil to rotating parts of the transmission, and
- a bi-directional pump which is hydraulically connected to the oil sump on a suction side, which is further hydraulically connected to the reservoir on a first pressure side and which is hydraulically connected to cooling nozzles of the electric machine on a second pressure side;
- wherein, operation of the bi-directional pump in a first direction of rotation supplies fluid to the reservoir, and operation of the bi-directional pump in a second direction of rotation supplies fluid to the cooling nozzles for cooling the stator end-windings.
6 more elements
An electric drive arrangement for a vehicle, comprising:
- a housing;
- an electric machine with a stator connected to the housing and including stator end-windings, and a rotor with a rotor shaft rotatably supported in the housing;
- a transmission to transmit a rotary movement from the rotor shaft to drive a driveline of the vehicle;
- a hydraulic circuit for circulating a fluid to cool and lubricate the electric machine and the transmission, comprising
- an oil sump formed in a lower portion of the housing,
- a reservoir arranged above the oil sump, the reservoir configured to temporarily store and feed oil to rotating parts of the transmission, and
- a bi-directional pump which is hydraulically connected to the oil sump on a suction side, is hydraulically connected to the reservoir on a first pressure side, and is hydraulically connected to cooling nozzles of the electric machine on a second pressure side;
- wherein operation of the bi-directional pump in a first direction of rotation supplies fluid to the reservoir, and operation of the bi-directional pump in a second direction of rotation supplies fluid to the cooling nozzles for cooling the stator end-windings,
- wherein the bi-directional pump is further hydraulically connected via the reservoir to an inner diameter of the driveshaft and/or to the transmission, and
- wherein operation of the bi-directional pump in the first direction of rotation supplies fluid to the inner diameter of the driveshaft and/or to the transmission.
7 more elements
An electric drive arrangement for a vehicle, comprising:
- a housing;
- an electric machine with a stator connected to the housing and including stator end-windings, and a rotor with a rotor shaft rotatably supported in the housing;
- a transmission to transmit a rotary movement from the rotor shaft to drive a driveline of the vehicle;
- and
- a hydraulic circuit for circulating a fluid to cool and lubricate the electric machine and the transmission, the hydraulic circuit comprising
- an oil sump formed in a lower portion of the housing,
- a reservoir arranged above the oil sump, wherein the reservoir is configured to temporarily store and feed oil to rotating parts of the transmission, and
- a bi-directional pump which is hydraulically connected to the oil sump on a suction side, which is further hydraulically connected to the reservoir on a first pressure side and which is hydraulically connected to cooling nozzles of the electric machine on a second pressure side;
- wherein operation of the bi-directional pump in a first direction of rotation supplies fluid to the reservoir, and operation of the bi-directional pump in a second direction of rotation supplies fluid to the cooling nozzles for cooling the stator end-windings, and
- wherein the bi-directional pump is hydraulically connected to a heat exchanger on the first pressure side and/or on the second pressure side.
7 more elements
Dependencies are inferred from the claim text.