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New and improved

AVL BOOST™ 2019 R2

Find out more about the latest release of AVL BOOST

AVL BOOST 2019 R2 is a virtual engine simulation tool that accurately predicts engine performance, acoustics, and the effectiveness of exhaust aftertreatment devices. It helps users to get the trade-off between high performance and emissions and fuel efficiency right.
 

Exhaust Gas Aftertreatment


Component Deactivation

The deactivation of individual components from the entire exhaust line model can be helpful when running diagnostic checks or other sorts of system analysis. BOOST Aftertreatment supports this analysis with new functionality to completely deactivate and activate selected components during a running simulation.

With the help of the data bus network, individual components – such as catalysts and filters – can receive a bypass flag. Once there, the component’s input fluxes feed directly through to the next component in the downstream direction. The internal states of the component, such as the substrate temperatures, surface loading, and soot loading, are all held during the bypass phase.

Bypass option for any AT component - Deactivation via data bus

Ash Segregation

This version of BOOST Aftertreatment presents an additional modeling step for the description of ash in particulate filters. The cake layer treats both ash and soot as two separate masses, featuring individual mass distributions over the height of the cake. It then filters soot and ash following a simple first-principle correlation depending on the locally available space. Ultimately, this process means that the transported particulate matter ends up filtered at the top surface of the cake.

When soot, from the mixture of soot and ash, gets regenerated, free void spaces appear over the height of the cake. Depending on the size of the voids and the amount of solid material above it, soot and ash can slide down. The migration velocity can be tuned by one global parameter, where zero represents an immobile cake and high values represent a continuously shrinking cake.

The combined application of the models for cake filtration, cake migration, and soot regeneration shows a known phenomenon in transient simulations: As soot gets removed, either passively or actively, an ash cake appears to grow, starting at the wall surface.

Inhomogeneous composition of the PM cake over the cake height

HiL Deployment and Custom Coding

To increase the usability of HiL deployment workflows and flexibility in custom coding, BOOST Aftertreatment offers two new enhancements: Model Export and Site Density.

Model Export

To export multiple BOOST modes to NI Veristand for the parallel execution on different RT nodes requires several manual steps. This procedure is now simplified and embedded in the model export function. You can specify model identifiers (postfixes) and export all needed model DLLs (and resource files) without any manual copying. This procedure accelerates model export and avoids potential mistakes that can occur in the course of manual interaction.

Site Density via Function

This user-coding interface offers the option of applying custom functions to the site density of surface storage reactions. This approach enables the possibility of protecting the intrinsic properties (values) of the site density while still exporting any kind of density multipliers.
 

Acoustic Starting


Acoustic Simulations Directly in BOOST 3D

With BOOST 3D 2019R2 executing solver and postprocessing tasks has been simplified. The BOOST 3D GUI starts the simulation automatically once modelling and meshing have finished and loads results automatically to the results tab for instant analysis.

Starting a simulation directly in the BOOST™ 3D GUI