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US 12,595,843 B2Granted
Electric drive for a vehicle
AssigneeGKN Automotive AG
InventorsTheodor Gassmann, John Foulsham, Ian Stone, Daniel Beeby
Life of this patent
Estimating the term…
Abstract
An electric drive for a vehicle comprises a housing, an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation, a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and a hydraulic circuit for circulating a fluid.
Claims17
An electric drive for a vehicle, comprising:
- a housing,
- an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation,
- a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and
- a hydraulic circuit for circulating a fluid, the hydraulic circuit comprising a pump hydraulically connected to a reservoir, a mode control valve hydraulically connected to the pump, a hydraulic stator path connecting the mode control valve with a portion of the electric machine to supply fluid to the stator, and a hydraulic transmission path connecting the mode control valve with a portion of the transmission,
- wherein the mode control valve is controllable such that in a low speed mode the stator end-windings of the electric machine are supplied with fluid via the hydraulic stator path, and in a high speed mode the transmission is supplied with fluid via the hydraulic transmission path.
2 more elements
An electric drive for a vehicle, comprising:
- a housing,
- an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation,
- a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and
- a hydraulic circuit for circulating a fluid, the hydraulic circuit comprising a pump hydraulically connected to a reservoir, a mode control valve hydraulically connected to the pump, a hydraulic stator path connecting the mode control valve with a portion of the electric machine to supply fluid to the stator, and a hydraulic transmission path connecting the mode control valve with a portion of the transmission,
- wherein the mode control valve is controllable such that in a low speed mode the stator end-windings of the electric machine are supplied with fluid via the hydraulic stator path, and in a high speed mode the transmission is supplied with fluid via the hydraulic transmission path, and
- wherein the housing includes an intermediate wall which separates the reservoir into a motor-side reservoir and a transmission-side reservoir, wherein a reservoir control valve is arranged in a through-opening of the intermediate wall to selectively open or close the through-opening.
3 more elements
An electric drive for a vehicle, comprising:
- a housing,
- an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation,
- a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and
- a hydraulic circuit for circulating a fluid, the hydraulic circuit comprising a pump hydraulically connected to a reservoir, a mode control valve hydraulically connected to the pump, a hydraulic stator path connecting the mode control valve with a portion of the electric machine to supply fluid to the stator, and a hydraulic transmission path connecting the mode control valve with a portion of the transmission,
- wherein the mode control valve is controllable such that in a low speed mode the stator end-windings of the electric machine are supplied with fluid via the hydraulic stator path, and in a high speed mode the transmission is supplied with fluid via the hydraulic transmission path,
- wherein the mode control valve is a three-way two-position directional valve, which in the high speed mode is in a normal position and in the low speed mode is in an actuated position, and
- wherein the mode control valve is hydraulically actuated, wherein the pump is a bidirectional pump, the mode control valve being actuated depending on a pumping direction of the pump.
4 more elements
Dependencies are inferred from the claim text.