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The propulsion system is one of the most complex systems in an automotive vehicle, heavily influencing other attributes and systems.

Both electrical and mechanical interfaces are important. As example the engine breathing put requirements on intake and exhaust systems while heat rejection influences aero and thermodynamics of the vehicle. The propulsion system acts also as one of the major noise and vibration sources in the vehicle. In terms of fuel consumption and emissions the propulsion system plays the most dominant role.

The technical complexity of the propulsion system has increased over the last years due to customer requirements and regulations. New technical solutions for both engines and transmissions have been introduced due to more stringent emission regulations in order to e.g. increase energy efficiency. Examples are automated stop/start and energy recovery systems but also more extensive after-treatment systems such as active ones in next generation diesel engines for heavier vehicles.

Automotive vehicles of tomorrow may feature a mixture of internal combustion engine (ICE), electrical (EV) or hybrid electric propulsion (HEV) solutions that all will require experience and skills in managing a seamless and efficient integration. Our core competences regarding ICE, EV and HEV propulsion systems are:

  • Performance and emission simulation
  • Powertrain physical and electrical integration incl. related subsystem
  • Functional and diagnostics calibration
  • Powertrain in-vehicle validation

ÅF is a premium supplier of engineering solutions within the engine, transmission and hybrid area with long experience from different global development programs. Main business focus is within integration of components and systems to obtain a well-balanced and optimized end-product that meets the expectation of our clients.


Lennart Hasselqvist

Lennart Hasselqvist

Propulsion Systems