Abstract: An electric vehicle includes a plurality of electric drive units coupled to one or more axles of the electric vehicle. The drive units have an associated power loss map that is approximated by a plurality of second-order polynomials. Torque is apportioned between the electric drive units to minimize total power losses based on coefficients of the second-order polynomials for each of the electric drive units and a driver torque demand.

Abstract: The disclosure concerns an operating method for an electric motor vehicle with at least one electrical machine as the traction motor and with an operating element for preselecting a coasting function, wherein, if the coasting function is preselected by the driver, under predetermined conditions the operating mode is automatically changed into a coasting mode, in which neither a drive torque nor a drag torque is exerted on the wheels of the vehicle. According to the disclosure, the predetermined conditions include the conditions that the gas pedal is in a neutral position and that the current speed of the vehicle is at or is greater than a preset value. Under the predetermined conditions the operating mode is automatically changed into the coasting mode by bringing the drive train of the vehicle into a state in which the at least one electrical machine is consuming no electrical energy.

Abstract: A method for controlling a vehicle driveline includes connecting an electric motor to each of respective vehicle wheels, determining from driver input a magnitude of demanded wheel torque, determining speed of each wheel, using demanded wheel torque and the respective wheel speed to determine from a power loss map a current power loss for each motor, and transmitting power from the motor having the lowest current power loss to the respective vehicle wheel.

Abstract: A method for controlling an electric vehicle drivetrain having least two drive units with wheels located on opposite axles are driven by respective drive units, includes in a first operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set taking into account the efficiency applicable to each drive unit under the given operating conditions, and in a second operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set independently of the efficiency applicable to each drive unit under the given operating conditions.

Abstract: A method for controlling an electric vehicle drivetrain having least two drive units with wheels located on opposite axles are driven by respective drive units, includes in a first operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set taking into account the efficiency applicable to each drive unit under the given operating conditions, and in a second operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set independently of the efficiency applicable to each drive unit under the given operating conditions.

Abstract: Closed-loop and open-loop systems are used for automated control of the operation of arbitrary systems. An open-loop control apparatus, which controls at least one controlled variable of a system such as a fuel cell system, has a pilot control module and an associated storage module, for storing pilot control characteristic data. The pilot control module carries out pilot control, based on a pilot control value determined from a desired value of the controlled variable from the pilot control characteristic data. A closed-loop control module performs closed-loop control of the controlled variable using a controlled portion determined on the basis of the actual value of the controlled variable. In the open-loop control apparatus, the pilot control value and the controlled portion each make respective contributions to a manipulated variable. An adaptation module matches the pilot control characteristic data in the storage module adaptively during the run time of the open-loop control apparatus.

Abstract: In a suspension of a vehicle wheel on a vehicle body, including a spring element for accommodating the compressive forces acting between the vehicle wheel and vehicle body and with a linear actuator for adjusting the kinematics and the distance between the vehicle wheel and the vehicle body, the spring element and the linear actuator include at least one tubular contraction element with at least one hydraulic or pneumatic or hydropneumatic pressure chamber enclosed in a casing, which is designed in such a way that a pressure rise in the pressure chamber widens the casing radially and shortens it axially.

Abstract: In a suspension of a vehicle wheel on a vehicle body, including a spring element for accommodating the compressive forces acting between the vehicle wheel and vehicle body and with a linear actuator for adjusting the kinematics and the distance between the vehicle wheel and the vehicle body, the spring element and the linear actuator include at least one tubular contraction element with at least one hydraulic or pneumatic or hydropneumatic pressure chamber enclosed in a casing, which is designed in such a way that a pressure rise in the pressure chamber widens the casing radially and shortens it axially.