Alfa Romeo

Vuoto

    MultiAir is a technological revolution; as much of an "epochal" turning point for petrol engines as common rail was for diesel engines.
    From the technical point of view, replacing the traditional throttle valves, it is an innovative hydro-electric system for operating the engine's intake valves that allows more direct and dynamic control of air intake and combustion.
    It is a significant progression from an environmental and economic perspective as MultiAir reduces fuel consumption and CO2 emissions and allows you to benefit from the incentives of government scrappage schemes.

    Tecnologia MultiAir

    The main advantages of MultiAir:

    - An increase in maximum power output from 10% - 35% with a cam profile designed for high performance
    - Up to 15% more torque in the low rev range thanks to direct control of valve lift
    - Up to 12% faster pick-up thanks to the high pressure of air mass
    - Up to 10% reduction in fuel consumption and carbon dioxide emissions thanks to the elimination of pumping loss.

    Advantages

    Technical details

    MultiAir technology allows a much more flexible control of the influx of air into the engine compared to mechanical timing systems.
    The system is based on the insertion of an amount of oil between the cam and the intake valve, which can be varied through an 'on-off' type solenoid valve, in turn controlled by an electronic control unit. With this system, the valve opening varies according to the request for air from the engine.

    Technical details

    Different valve opening and closing strategies are employed to optimize the efficiency of combustion.
    The constant air pressure upstream of the valves and the improved dynamics of the system eliminate any delay in torque response, thus greatly enhancing the pleasure of the driving experience.

    LIVO (Late Intake Valve Opening)
    Later opening of the intake valves - Engine partial load
    E.g. at engine start-up or idling

    technologies

    EIVC (Early Intake Valve Closing)
    Earlier closing of the intake valves - Torque at low revs and engine full load
    E.g. during acceleration

    MULTI LIFT
    Multiple valve opening during the same cycle - Minimum torque and power
    E.g. city driving

    FULL LIFT
    Full opening of the valves
    When full engine power is required
    E.g. on motorways

    technologies 2

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