Working paper HDH-12-03e is a joint presentation of the three institutes tasked with conducting validation test program 1.

Mr. Six started the presentation with a general overview of the progress achieved. Development of the driver models for the different approaches (WHVC and WHDHC) has been finished. Inclusion of non-electric components has been largely finalized, and the development of the thermal models will be completed within the next two weeks. From meetings with OEMs (see page 7), it was reported that a fully vehicle independent approach does not seem to be feasible, and that some OEMs considered that a SILS approach would be preferred over HILS. Most commonly used powerpack components are already included in the component library with a planetary gearbox model added recently. The component list will be checked, if vehicles for validation test program 2 are identified.

Mr. Silberholz continued with the description of the thermal models (task 1.6). Details of task 1.6 are shown on pages 9 to 17. The thermal model for the aftertreatment system (ATS) has been finished, the models for the coolant and lube oil circuit will be finished by the end of January, and the models for battery and electric motor will be finished within the next week and validated by the end of January.

Investigation into the different drive cycle options (WHVC vs. WHDHC) is an important part of validation test program 1. The results are shown on pages 18 to 34 for the serial hybrid. The two options only lead to comparable positive traction work, if the WHVC is accompanied with slopes. Even then, the power distribution over rotational speed at the wheel hub is different between the two options, as shown on page 27. Using the WHTC as basis leads to highly fluctuating torque signals that may cause ECU errors, as already indicated by Japan at the 11th HDH meeting. In order to solve the problem, curve smoothing is necessary. Curve smoothing was demonstrated to have no significant impact on the positive work (page 31) nor on the power distribution (page 32).

The major focus of Task 2 is currently the restructuring of the models, which is a prerequisite for setting up the data bus system needed for the component library. The results are shown on pages 37 to 44. The restructuring requires two types of interfaces (page 39). The physical interface is related to how different components are connected together, physically. The signal interface is related to control/sensor signals needed for the ECU. The proposed solution is the port based approach shown on pages 40 to 42. This approach allows easy interchanging of components including integration of OEM subsystems.