Avl List Gmbh

Technische Universitat Darmstadt

Raja Sangili Vadamalu

Christian Beidl

Maximilian Bier

Sakthivel Pavithiran

The operation of a hybrid powertrain system is optimized with respect to a desired state-of-charge trajectory, taking account of the estimated anticipated vehicle drive power. The hybrid powertrain system has an internal combustion engine and an electrically operated torque machine. The internal combustion engine and the torque machine are controlled by a control device and are connected to an output element via a hybrid transmission. Before the start of the prediction period &#x394;t, an experience-based state-of-charge trajectory for the anticipated route, covering at least the prediction period &#x394;t, is retrieved from an external database. The desired state-of-charge trajectory is established based on the experience-based state-of-charge trajectory by modifying it with at least one optimization constraint. The experience-based state-of-charge trajectory can be established based on operating data from hybrid powertrain systems of multiple vehicles and/or from operating data from multiple comparable journeys with the same vehicle.

Method for operating a vehicle with a hybrid drive train

To improve the identification of system parameters of a test setup of a test bench there is provision for the test setup to be dynamically excited on the test bench by virtue of a dynamic input signal being applied to the test setup. Measured values of the input signal of the test setup and of a resultant output signal of the test setup are recorded. A frequency response of the dynamic response of the test setup between the output signal and the input signal is determined using a nonparametric identification method. A model structure of a parametric model that maps the input signal onto the output signal is derived from the frequency response. The model structure and a parametric identification method are used to determine at least one system parameter of the test setup, and the at least one identified system parameter is used to perform the test run.

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Darmstadt, Germany

Raja Sangili Vadamalu