En gros, résumé du fonctionnement:
Site du fabricant: FPT MultiAirRinolfi’s MultiAir engine uses an electronic hydraulic- valve lift system that allows the engine to automatically adjust the amount of airflow into the combustion chambers, without the use of a traditional throttle valve. In addition to saving fuel, it also reduces carbon emissions by at least 10 percent, he said. The valve control system updates the internal combustion engine, where burning fuel in chambers filled with air creates pressure that applies force to moveable parts.
In the traditional engine, the valves that pump air into the chambers open fully, regardless of how fast the car is moving. Even if the car is coasting and needs less power to keep momentum, air and fuel get in and energy is wasted.
“For years, engines have lost energy in this pumping process,” said Rinolfi, vice president of Fiat Powertrain Research & Development, who joined Fiat in 1971 after getting a physics degree at the University of Turin.
Pas grand info technique, dommage... On sait juste que c'est un système électro-hydraulique qui contrôle les valves indépendemment sur chaque cylindre... Ça l'air semblable au système Valvetronic de BMW (edit: et au VVEL de Nissan)?
En théorie ça fait du sens... En effet, pourquoi ne pas utiliser l'ouverture des valves pour controler l'admission d'air? Mais est-ce vraiment plus efficace? Votre avis là-dessus?
