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Electrification

The simulation of vehicles with different levels of electrification (from HEV to PEV), the optimization of electrical systems and their components such as electric drives, batteries and fuel cells under completely new operating conditions, and the performance improvement of electrical turbochargers are just a few examples of AVL's innovative simulation capabilities in the huge field of new and challenging technology trends.

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Highly Detailed Analysis of Electric Machine and Hybrid Powertrain NVH

The detailed component and system analysis in view of dynamics, strength/durability and acoustics of hybrid powertrain configurations is the domain of AVL EXCITE. Analysis targets include the dynamics of front-end belt drives and the interaction with the crank train of belt-driven starter-generator or mild hybrid systems, detailed investigations of crank train bearing behavior under hybrid-drive-specifi c loading conditions, the dynamics and NVH of transmissions under combined loading, effects of non-stationary conditions as start-stop, transition, boosting or braking by the electric machine on the powertrain.

Optimizing Energy Storage and Cooling Systems

AVL FIRE® allows the prediction of the overall behaviour of a Li-Ion battery cell, a module or a complete battery during transient charging and discharging processes. Critical conditions can be identified, thereby helping to optimize the system in respect of electro-chemistry, performance and thermal management. To accomplish these tasks, AVL FIRE® offers empirical but also predictive electro-chemical battery models enabling the simulation of electric charge transport in active layers plus and negative collector and heat conduction in thermal masses, while considering electric and thermal contact resistance.

Understanding the Fuel Cell

A comprehensive set of electro-chemical and physical models is offered by AVL FIRE® to simulate the processes taking place in polymer electrolyte membrane fuel cells (PEM FC). In the catalyst layers AVL FIRE® solves the electro-chemical reactions. Water transport and the transport of hydrogen ions and gas species is calculated in the membrane. Phenomena handled in the gas diffusion layer include the capillary flow of liquid water and electron conduction. Also phase change due to evaporation and condensation, multi-phase momentum transfer, multi-component diffusion of gas species and multiphase heat transfer are modelled. Heat and electron conduction are calculated in the bi-polar plates. The simulation of the cooling channels is also covered to account for convective heat transport.

Energy Efficiency is the Final Goal

Vehicle component and sub-system development cannot be done in isolation when the goal is to have improvements in fuel economy, performance and drivability. The acceptance and success of a new vehicle is determined by its strategic target definition, the choice of the powertrain configuration and the selection and sizing of the components – early in the first development phase. AVL CRUISE offers a wide range of implemented electric components on a system level, dynamic power flow and energy distribution analysis and an open concept to interface with other tools, which provides an incredible base for all hybrid concepts and control function development for all vehicle types from PEV to full HEV and other alternative powertrain solutions.

Component and System Design Analysis

Compared to conventional powertrains, the layout and design of hybrid drives requires the investigation of specific operating conditions such as non-stationary effects caused by additional torque of the electric machine switched on and off. The detailed component and system analysis in view of dynamics, strength/durability and acoustics of hybrid powertrain configurations is the domain of AVL EXCITE. Analysis targets include the dynamics of front-end belt drives and the interaction with the crank train of belt-driven starter-generator or mild hybrid systems, detailed investigations of crank train bearing behavior under hybrid-drive-specific loading conditions, the dynamics and NVH of transmissions under combined loading, effects of non-stationary conditions as start-stop, transition, boosting or braking by the electric machine on the powertrain.