Technical Paper
Investigation of fuel economy prediction technology considering engine thermal flow for hybrid electric vehicle, and application to vehicle development process
2024-04-09
2024-01-2408
Powertrain development requires an efficient development process with no rework and model-based design (MBD), in addition to performance design that achieves low CO2 emissions. Furthermore, it also demands fuel economy performance considering real-world usage conditions, and in North America, the EPA 5-cycle, which evaluates performance in a combination of various environments, is applied. This evaluation mode necessitates predicting performance while considering engine heat flow, particularly simulation technology that takes into account behavior based on engine temperature. Additionally, in the development trend of vehicle aerodynamic improvement, variable devices like Active Grille Shutter (AGS) are utilized to contribute to reducing CO2 emissions. When equipped with AGS, the engine's heat flow environment also changes, resulting in more complex phenomena in the engine compartment compared to the without AGS.