Abstract
Keywords - Energy Management, energy architecture, E/E architecture, platforms, AUTOSAR
Energy Management in vehicles is a topic nearly every car manufacturer is involved with. State of the art is an individual, vehicle or platform specific integration of Energy Management as a single characteristic solution with limited extension capabilities. A Multiple Platform Energy Management with high flexibility instead enables the integration in more platforms and vehicles and thus reducing effort and costs per vehicle with increasing quality at the same time. The full paper will cover necessary software components and methodologies in order to enable multiple platform integration.
A core feature is splitting the energy management up into ECU (Electronic Control Unit) specific and system specific functionality and distributing it over the vehicle E/E architecture thus generating the energy architecture. The Multiple Platform Energy Management consists of decentralized and centralized software functions. The decentralized ECU specific software functions provide energy evaluation for the corresponding ECU and interaction to ECU bounded functions. Typical ECU bounded functions are driver assistance, chassis control or hybrid propulsion. The centralized system functions determine and evaluate the system wide energy state and control the energy in the vehicle E/E architecture. This is the real energy management and the core of the energy architecture, where algorithms for strategic behavior are included. It makes the appropriate decisions for energy rationing, controls the energy consumption and cycles the energy storages.
The partitioning of the energy management is supported by automotive software and architecture standards. The full paper will show the involved standardization AUTOSAR and highlight resulting consequences. Another characteristic for platform integration is configuration and calibration for the chosen platform, because realizing energy supply always refers to a real platform. Configuration and calibration needs to fit into manufacturer specific development and make process for the executable software of the embedded controllers. Because tool landscape is an important part of development process, a tool integration possibility will be proposed. The configuration possibilities of the Multi Platform Energy Management enable varying the focus between important platform properties like propulsion, comfort or efficiency and take into account different ECUs integrated in the vehicle E/E architecture. Platform independence is supported by a fixed interface for ECU energy behavior with signals describing consumption, generation or storage, which simplifies the transfer between vehicle E/E architectures. Service oriented communication is an appropriate method to implement flexibility in energy architecture via dynamic connection of communication participants.