Fiat'sTwinAir engineis aStraight-twin enginedesigned byFiat Powertrain Technologiesas part of itsSmall Gasoline Engine(SGE) family — employing Fiat’sMultiAirhydraulically actuatedvariable valve timing and lifttechnology.
| TwinAir engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Fiat Powertrain Technologies(2010-2011) Fiat Group Automobiles(2011-2014) FCA Italy(2014-) |
| Also called | SGE (Small Gasoline Engine) |
| Production | 2010–present |
| Layout | |
| Configuration | Straight-two |
| Displacement | 1.0L(964cc) (naturally aspirated) 0.9 L (875 cc) (turbocharged) |
| Cylinder bore | 83.5mm(3.29in) (naturally aspirated) 80.5 mm (3.17 in) (turbocharged) |
| Piston stroke | 88 mm (3.5 in) (naturally aspirated) 86 mm (3.4 in) (turbocharged) |
| Cylinder blockmaterial | Cast iron |
| Cylinder headmaterial | Aluminium |
| Valvetrain | 8-valve, chain-drivenSOHC,MultiAir |
| Compression ratio | 11.2:1 (naturally aspirated) 10.0:1 (turbocharged) |
| Combustion | |
| Turbocharger | Single (in some versions) |
| Fuelsystem | Indirect injection |
| Fuel type | Gasoline/CNG,bifuel |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 60PS(44kW) (naturally aspirated) 80 PS (59 kW) (bifuel turbo) 85 PS (63 kW) or 105 PS (77 kW) (turbo) |
| Specific power | 62 PS/L (TwinAir 60) 97 PS/L (TwinAir 85) 120 PS/L (TwinAir 105) |
| Torque output | 88N⋅m(65lb⋅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 | |
| Predecessor | FIRE engine |
| Successor | Fiat Global Small Engine |
Offered in a variety ofFCAvehicles in turbocharged and naturally aspirated variants, the engine is noted for its reduced size, weight,fuel consumptionandCO2emissions.
In the 2011International Engine of the Yearawards, 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
edit
Fiat's TwinAir debuted atInternationale Automobil-Ausstellung2007 in theFiat Panda Ariaconcept car.[3]as an 80 PS (59 kW), turbocharged, CNG-hydrogen mix and gasoline bifuel unit.
The production TwinAir engine was launched at the 2010Geneva Motor Showin 85 PS (63 kW), turbocharged gasoline form and became available later in 2010 in theFiat 500.[4]
Later, it was launched also in other FCA vehicles such as the2012 Punto.The naturally aspirated 1.0 L 60 PS (44 kW) version became available on the2012 Fiat Pandaand the 500 in select markets, and so two other turbocharged 0.9 L variants: the 80 PS bi-fuel CNG/petrol unit (on Panda,500LandYpsilon) and the 105 PS unit (onMiTo,Punto, 500L and 500).
Applications
editAwards
edit- Technobest 2010[5]
- Die Besten Autos 2011:[6]
- Paul Pietsch Prize
- International Engine of the Year 2011:[7]
- International Engine of the Year
- Sub 1-litre class
- Best New Engine
- Best Green Engine
- International Engine of the Year 2013:
- Best Green Engine (TwinAir CNG bifuel)
References
edit- ^"Fiat 875cc TwinAir".ukipme.Archived fromthe originalon 2013-02-05.Retrieved2012-01-03.
- ^"Fiat's 0.9-Liter TwinAir Scoops the" International Engine of the Year 2011 "Award".Carscoops. May 18, 2011.
- ^Borgomeo, Vincenzo (3 September 2007)."La Fiat Panda" va ad aria ". Provocante concept car".la Repubblica(in Italian).Retrieved5 September2014.
- ^"Geneva motor show 2010: Fiat reveals 2cyl Twin-Air engine".Autocar.2 March 2010.Retrieved5 September2014.
- ^"De Fiat Twinair wint de Technobest 2010 prijs".Auto Edizione(in Dutch). 14 September 2010.Retrieved6 December2014.
- ^"TwinAir technology wins" Paul Pietsch "prize in" Die Besten Autos 2011 "competition".Fiatpress.28 January 2011. Archived fromthe originalon 24 September 2015.Retrieved5 September2014.
- ^"Triumph by Fiat and Ferrari at the" International Engine of the Year Awards "".Fiatpress.18 May 2011. Archived fromthe originalon 24 September 2015.Retrieved5 September2014.