Fiat MultiAir Technology – A New Innovation In VVT Technology


The 2010 Geneva Motor Show acted as a potential platform for Fiat to present its very innovative Fiat MultiAir Technology and is seen to be as important as the CRDI technology that the same had introduced 15 years back.Also known as Dubbed MultiAir ,it uses an element of hydraulics with the conventional VVT technology to deliver a more controlled flow of air into the combustion chamber.

Fiat MultiAir Engine (2)

Fiat claims to have cut-down the fuel consumption along with better power and torque in petrol engines,with the new engine and has announced it as a fundamental breakthrough. The brand also has plans to replace its large engines with the new technology,with the company’s 1.0 liter and 1.4 liter engines being first in the list followed by type new 900CC engine.

Benefits Of Fiat MultiAir Technology

  • A Power-oriented mechanical camshaft increases maximum power by 10 percent
  • Early Intake Valve strategies improve low RPM torque by 15 percent
  • Elimination of Pumping Losses improve fuel consumption cuts down CO2 emissions and fuel consumption by 10 percent
  • MultiAir turbocharged and downsized engines deliver 25 percent better fuel economy over the conventional naturally aspirated engines enhancing same level of performances
  • Valve control strategies result in reductions of 40 percent for unburnt hydrocarbons and carbon monoxide (HC/CO), and up to a 60 per cent cut in oxides of nitrogen, (NOx)
  • Enhanced driving pleasure and a superior dynamic engine response
  • Most importantly the technology could be used for both petrol as well as diesel engines

Working Of Fiat MultiAir Technology

  • A piston, moved by a mechanical intake camshaft is connected to the intake valve through a hydraulic chamber,further controlled by a normally open on/off solenoid valve.
  • When the solenoid valve is closed the oil inside it acts as a solid and does not involve in the lift schedule imposed by the mechanical intake camshaft
  • But when its open the hydraulic chamber and intake valve disconnect handing total control over to the valve spring action
  • The final stage of valve closing stroke is controlled by a dedicated hydraulic brake ensuring smoother landing phase under any operating conditions and with the solenoid mechanism a number of valve opening schedules can be obtained
  • For Maximum Power: Solenoid valve is always closed and the mechanical camshaft controls the full valve opening
  • For Low-RPM Torque: Solenoid valve is opened near the end of the camshaft profile which leads to early intake valve closing eliminating air-mass backflow and increasing air-mass trapped in the cylinder

Take a look at the official video of Fiat MultiAir Technology

For the timing Fiat’s Indian line-up will not get such engines but they are expected soon since this new innovation certainly has a great potential and it will certainly help the brand to grow and come into the limelight once again.

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