Loading patent…
AssigneeMAGNA Powertrain AG & Co KG
InventorsWolfgang SCHWEIGER, Matthias PFAU
Estimating the term…
The invention relates to an arrangement for the requirement-based distribution of cooling/lubricating oils in electric traction drives with an electrically controllable motor pump unit and a hydraulic arrangement, wherein the motor pump unit can be controlled in both rotational directions, and wherein the motor pump unit is connected via a heat exchanger to several fluid outlets for partial volume flows which are connected at least to the stator of an electric machine, the rotor of an electric machine and the transmission for cooling and/or heating and/or lubrication, wherein at least one fluid outlet is additionally opened via at least one hydraulically switchable valve when the rotational direction of the motor pump unit is reversed.
An arrangement for requirement-based distribution of cooling/lubricating oil flows in electric traction drives with an electrically controllable motor pump unit and a hydraulic arrangement, wherein the motor pump unit can be activated in both directions of rotation, and wherein the motor pump unit is connected via a heat exchanger to a plurality of fluid outlets for partial volume flows which are connected at least to the stator of an electric machine, to the rotor of an electric machine, and to the transmission for cooling and/or heating and/or lubrication purposes, wherein at least one fluid outlet is additionally opened via at least one hydraulically switchable valve when a reversal of the direction of rotation of the motor pump unit takes place.
A method for requirement-based distribution of cooling/lubricating oil flows in electric traction drives with an electrically controllable motor pump unit and a hydraulic arrangement, wherein the motor pump unit is activated in both directions of rotation, and wherein the motor pump unit is connected via a heat exchanger to a plurality of fluid outlets which are connected at least to the stator of an electric machine, and/or to the rotor of an electric machine, and/or to the transmission for cooling and/or heating and/or lubrication purposes, wherein at least one fluid outlet is additionally opened via at least one hydraulically switchable valve when a reversal of the direction of rotation of the motor pump unit takes place.
Dependencies are inferred from the claim text.