A drive unit includes an electric drive motor for driving and an electric generator motor in a series hybrid vehicle. Each of the motors includes a helical cooling passage helically surrounding an outer periphery of its stator. The first and second electric motors are housed in an outer housing such that the rotor axes are parallel. The helical cooling passages of the motors are connected in series via a connecting passage. The coolant outlet of the upstream helical cooling passage is connected to the connecting passage. The coolant inlet of the downstream helical cooling passage is connected to the connecting passage. The coolant outlet of the upstream helical cooling passage and the coolant inlet of the downstream helical cooling passage are arranged at end portions on the same side in a direction of the rotor axes.
DRIVE UNIT FOR SERIES HYBRID VEHICLE
18.05.2023
Patent
Elektronische Ressource
Englisch