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  2. MultiAir - Wikipedia

    en.wikipedia.org/wiki/MultiAir

    MultiAir or Multiair is a hydraulically-actuated variable valve timing (VVT) and variable valve lift (VVL) engine technology enabling "cylinder by cylinder, stroke by stroke" [1] control of intake air directly via a gasoline engine's inlet valves. Developed by Fiat Powertrain Technologies, the technology addresses a primary engine inefficiency ...

  3. Fiat TwinAir engine - Wikipedia

    en.wikipedia.org/wiki/Fiat_TwinAir_engine

    Fiat's TwinAir debuted at Internationale Automobil-Ausstellung 2007 in the Fiat Panda Aria concept car. [ 3 ] as an 80 PS (59 kW), turbocharged, CNG-hydrogen mix and gasoline bifuel unit. The production TwinAir engine was launched at the 2010 Geneva Motor Show in 85 PS (63 kW), turbocharged gasoline form and became available later in 2010 in ...

  4. Variable valve lift - Wikipedia

    en.wikipedia.org/wiki/Variable_valve_lift

    Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, and continuous, which is able to vary the amount of lift.

  5. Variator (variable valve timing) - Wikipedia

    en.wikipedia.org/wiki/Variator_(variable_valve...

    There are many systems for VVT, which involve changing either the relative timing, duration or opening of the engine's inlet and exhaust valves. One of the first practical VVT systems used a variator to change the phase [note 1] of the camshaft and valves. This simple system cannot change the duration of the valve opening, or their lift.

  6. Variable valve timing - Wikipedia

    en.wikipedia.org/wiki/Variable_valve_timing

    This engine uses continuously variable timing for the inlet valves. Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems.

  7. Variable Valve Control - Wikipedia

    en.wikipedia.org/wiki/Variable_Valve_Control

    The system has the advantage that it is continuously variable rather than switching in at a set speed. Its disadvantage is the complexity of the system and corresponding price. Other systems will achieve similar results with less cost and simpler design (electronic control). For a more detailed description, see the sandsmuseum link below.

  8. Fiat Global Small Engine - Wikipedia

    en.wikipedia.org/wiki/Fiat_Global_Small_Engine

    The FCA Global Small Engine (or GSE, marketed as FireFly) is a family of engines produced by Fiat Chrysler Automobiles (FCA) starting in 2016, and subsequently produced by Stellantis, gradually replacing the FIRE (including MultiAir versions) and SGE (TwinAir) units.

  9. Camless piston engine - Wikipedia

    en.wikipedia.org/wiki/Camless_piston_engine

    Camless valve trains have long been investigated by several companies, including Renault, BMW, Fiat, Valeo, General Motors, Ricardo, Lotus Engineering who developed electro-hydraulic valve actuation in the late 1980s as a spinoff of their active suspension program (both utilised similar electro-hydraulic actuation and control), Ford, Jiangsu Gongda Power Technologies, and Koenigsegg's sister ...