VOKAL

 

The introduction of the Euro 7 emission standard increases the requirements in powertrain development, as real road tests have to be performed under strict conditions. Virtual development methods such as simulations can reduce the testing effort required for this and increase the quality of solutions to minimize fuel or energy consumption and pollutant emissions.

 

The focus of the project is to validate the detailed simulation models to represent complex interactions between the real ECU, the modeled powertrain components and the vehicle environment on an innovative hardware-in-the-loop (HiL) based driving simulator using real measurements from a vehicle. The HiL requires robust models to describe fuel consumption and emission generation under transient operating conditions as a basis for developing CO2-
emission-optimized control units.

Previous studies have shown¹ that there is potential for improvement in model accuracy and extrapolation capability under transient conditions, such as in areas that are not part of the standard approval cycles. Therefore, in the project, the HiL will overcome this problem through the implemented real driving distances and behaviors. In addition, the parameterization of the route models will be improved to increase their robustness.

The findings from the validation will be used to realize a demonstrative test of the new development methodology "virtual calibration "² and to exploit its advantages for the development of CO2 emission-optimal control strategies in the course of the introduction of new exhaust emission standards.

¹Picerno, M.; Real-Time Emission Prediction with Detailed Chemistry under Transient Conditions for HiL Simulations. Energies
²Lee, S.-Y.; HiL-Based Virtual Calibration Approach to Meet Real Driving Emissions Requirements. SAE

 

Funding