Case study 01 · Centro Ricerche Fiat · 1993–2008
MultiAir: Bringing Fully Variable Valve Actuation Into Production

Challenge
Fully variable valve actuation promised a step change in gasoline efficiency, torque response and emissions control — but only on the test bench. Electro-hydraulic valve control introduced tolerances, thermal behaviour, durability risk and unit cost that no series production plant had absorbed before. The technology risked staying a research showcase while regulators tightened limits every cycle.
Approach & solution
- Ran the physics first: combustion development, fluid dynamics and valvetrain analysis to establish which control strategies delivered real efficiency gains rather than bench artefacts.
- Moved actuation hardware through progressively harder validation — component rigs, engine dynamometers, calibration cycles and demonstrator vehicles — closing durability and tolerance gaps before industrial commitment.
- Worked side by side with fuel injection and calibration teams so valve control, mixture preparation and engine mapping were developed as one system, not three handoffs.
- Partnered with manufacturing engineering early to convert research specifications into producible tolerances, assembly sequences and plant-level process capability.
Results
- MultiAir fully variable valve actuation reached series production — a first-of-its-kind system in volume gasoline engines.
- Became the enabling technology for the FIRE MAIR Turbo, later named Best New Engine of the Year in 2009.
- Established a validated technology base that carried across multiple engine families and market regions for more than a decade.
- Contributed to two granted patents in powertrain technology.
Conclusion
This program set the pattern for everything that followed: a research idea is only valuable once a plant can build it repeatably and a customer can drive it for ten years. It demonstrates deep technical command of combustion and valvetrain engineering combined with the industrial realism to make breakthrough technology manufacturable.



