An electric vehicle drive system includes first and second electric motors, first and second torque limiters and a torque splitter. The first and second torque limiters correspond to the first and second electric motors, respectively, and generate respective first and second maximum torques. The torque splitter receives a first input that includes at least a total torque request for the first and second electric motors and the first and second maximum torques and generates at least respective first and second torque requests for the first and second electric motors, wherein the torque splitter is configured to direct a torque request to the second motor only if the first maximum torque is less than a threshold. The torque splitter may generate a zero second torque request if a motor speed of the first electric motor exceeds a threshold.
Control system for an all-wheel drive electric vehicle
2018-11-20
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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