Skip to main content
European Commission logo

Hybrid supercharging system for engines with high downsizing

European Union
Complete with results
Project website
Project Acronym
STRIA Roadmaps
Transport electrification (ELT)
Vehicle design and manufacturing (VDM)
Transport policies
Deployment planning/Financing/Market roll-out,
Environmental/Emissions aspects


Background & Policy context

The increasing pressure of regulations on emissions coupled with the imperatives of reducing the environmental footprint of vehicles, led all players in the automotive industry to seek solutions to reduce CO2 emissions. One of the solutions envisaged to reduce the consumption of the engines was reducing the cubic capacity of the engine (downsizing). However this capacity reduction cannot currently exceed a threshold of 30% without risk of degrading vehicle performance.


This project develops a solution to go further in the virtuous path of engines "downsizing". The proposed solution combines:

  • An electric air compressor (also called electric supercharger) supercharging the engine at low system in addition to a turbo-compressor
  • A hybridization system to promote the recovery of kinetic energy.

The project is divided into 6 lots shared between the partners aimed at:

  • The specification and development of the various components,
  • validation of all technologies by bench testing and by carrying out a demonstration vehicle, and
  • demonstration of the technical feasibility and economic competitiveness of evaluated solutions.


Work on the SURAL-HY project allowed the development of different technological components necessary for the extreme use of "downsizing" and "downspeeding":

  • AMESim LMS Simulation Platform
  • Turbo-compressor - Floor (Specific power 10kW / L)
  • Floor Compressor impeller for e-Supercharger (Fort pressure ratio of 1.7, reduced flow range de150kg / h)
  • Supervision laws for a couple of intake (Motor Services 'downsized' with level equivalent to the reference engine)
  • Optimized energy management laws(significantly Shrink electrical system (12V system))


Lead Organisation
EU Contribution
Partner Organisations
EU Contribution


Contribute! Submit your project

Do you wish to submit a project or a programme? Head over to the Contribute page, login and follow the process!