Method and apparatus for controlling power transmission system in electric car

• Main Authors: DERFLINGER MONIKA, SPONHEIMER ARNULF, GRAAF ROGER, SIMON MARC
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL

The invention provides a method and an apparatus for controlling a power transmission system in an electric car. The power transmission system comprises at least two drive units, wherein at least two car wheels arranged on different car axles of the electric car can be driven by the different drive units. The method involves adjusting the ratio of rotational torques, provided by the drive units for a preset rotational torque, under consideration of the power efficiency, applied for the drive units under preset operation conditions, in a first mode of operation; and adjusting the ratio of the rotational torques provided by the drive units for the preset rotational torque, independent of the power efficiency, applied for the drive units under preset operation conditions, in a second mode of operation.