23. Internationales Stuttgarter Symposium

Automobil- und Motorentechnik

4. - 5. Juli 2023

Session: ZERO-IMPACT- EMISSIONS II | | 15:30 - 16:00

Using Virtualization for possible Trade-offs between EU7 Start Budget Criteria and Drivability

Lukas Behr, Robert Bosch GmbH

Upcoming EU7, shortage of time, budgets, and test vehicles at a wider variant portfolio will lead to an increase of complexity with significant impact on development of Engine Control Unit (ECU) functionalities. Virtualization is a key success factor to face these new challenges. Within a Bosch project, a virtual vehicle to calibrate emission use cases is established in a Software-in-the-Loop (SiL) environment. The modular approach is flexible to be tailored for various topologies of vehicles. Arbitrary cycle scenarios with flexible boundary conditions can be simulated. It offers multiple new opportunities, along with time- and cost-efficient and location independent benefits. It is usable for multiple software (SW) and calibration tasks on different levels of complexity. Based on a use case the benefits and opportunities for future tasks are shown. Critical cold start emissions are simulated under various boundary conditions. Different calibration measures, such as torque limitation and drive-off delay, and their impact on the trade-off between emissions and drivability are considered and put into context with EU7 start budget criteria. The use of virtualization enables identification of new fields of emission reduction potential and leads to the development of new calibration strategies. New methodologies and automation processes have been elaborated. Virtualization is a chance of mastering future complexity in ECU development.