Fiat TwinAir engine

Fiat's TwinAir engine is a Straight-twin engine designed by Fiat Powertrain Technologies as part of its Small Gasoline Engine (SGE) family — employing Fiat’s MultiAir hydraulically actuated variable valve timing and lift technology.

Not to be confused with GM small gasoline engine.
TwinAir engine
Overview
ManufacturerFiat Powertrain Technologies (2010-2011)
Fiat Group Automobiles (2011-2014)
FCA Italy (2014-)
Also calledSGE (Small Gasoline Engine)
Production2010–present
Layout
ConfigurationStraight-two
Displacement1.0 L (964 cc) (naturally aspirated)
0.9 L (875 cc) (turbocharged)
Cylinder bore83.5 mm (3.29 in) (naturally aspirated)
80.5 mm (3.17 in) (turbocharged)
Piston stroke88 mm (3.5 in) (naturally aspirated)
86 mm (3.4 in) (turbocharged)
Cylinder block materialCast iron
Cylinder head materialAluminium
Valvetrain8-valve, chain-driven SOHC, MultiAir
Compression ratio11.2:1 (naturally aspirated)
10.0:1 (turbocharged)
Combustion
TurbochargerSingle (in some versions)
Fuel systemIndirect injection
Fuel typeGasoline/CNG, bifuel
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output60 PS (44 kW) (naturally aspirated)
80 PS (59 kW) (bifuel turbo)
85 PS (63 kW) or 105 PS (77 kW) (turbo)
Specific power62 PS/L (TwinAir 60)
97 PS/L (TwinAir 85)
120 PS/L (TwinAir 105)
Torque output88 N⋅m (65 lb⋅ft) at 3,500 rpm (naturally aspirated)
140 N⋅m (103 lb⋅ft) at 2,500 rpm (bifuel turbo)
145 N⋅m (107 lb⋅ft) at 2,000 rpm (turbo)
Chronology
PredecessorFIRE engine
SuccessorFiat Global Small Engine

Offered in a variety of FCA vehicles in turbocharged and naturally aspirated variants, the engine is noted for its reduced size, weight, fuel consumption and CO2 emissions.

In the 2011 International Engine of the Year awards, the 875 cc (53.4 cu in) TwinAir won Best Engine Under 1 Litre, Best New Engine, Best Green Engine and International Engine of the Year. [1] Dean Slavnich, editor of Engine Technology International and co-chairman of the International Engine of the Year Awards, called the TwinAir one of the "all-time great engines.”[2]

Development and launch
Fiat Panda Aria at IAA 2007

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 the Fiat 500.[4]

Later, it was launched also in other FCA vehicles such as the 2012 Punto. The naturally aspirated 1.0 L 60 PS (44 kW) version became available on the 2012 Fiat Panda and the 500 in select markets, and so two other turbocharged 0.9 L variants: the 80 PS bi-fuel CNG/petrol unit (on Panda, 500L and Ypsilon) and the 105 PS unit (on MiTo, Punto, 500L and 500).

Applications

Awards

References
  1. "Fiat 875cc TwinAir". ukipme.com. Archived from the original on 2013-02-05. Retrieved 2012-01-03.
  2. "Fiat's 0.9-Liter TwinAir Scoops the "International Engine of the Year 2011" Award". Carscoops. May 18, 2011.
  3. Borgomeo, Vincenzo (3 September 2007). "La Fiat Panda "va ad aria". Provocante concept car". la Repubblica (in Italian). Retrieved 5 September 2014.
  4. "Geneva motor show 2010: Fiat reveals 2cyl Twin-Air engine". Autocar. 2 March 2010. Retrieved 5 September 2014.
  5. "De Fiat Twinair wint de Technobest 2010 prijs". Auto Edizione (in Dutch). 14 September 2010. Retrieved 6 December 2014.
  6. "TwinAir technology wins "Paul Pietsch" prize in "Die Besten Autos 2011" competition". Fiatpress. 28 January 2011. Retrieved 5 September 2014.
  7. "Triumph by Fiat and Ferrari at the "International Engine of the Year Awards"". Fiatpress. 18 May 2011. Retrieved 5 September 2014.
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