Hyundai U engine

The Hyundai U engine is a series of three or four-cylinder diesel engines made for automotive applications by the Hyundai Kia Automotive Group. The U series of engines includes the smallest automotive diesel engines produced by Hyundai.[1]

Hyundai U engine
Overview
ManufacturerHyundai Kia Automotive Group
Layout
ConfigurationStraight-3 or Straight-4
Displacement1.1 L (1,090 cc)
1.2 L (1,186 cc)
1.4 L (1,396 cc)
1.5 L (1,493 cc)
1.6 L (1,582 cc)
1.7 L (1,685 cc)
Cylinder bore75 mm (2.95 in)
77.2 mm (3.04 in)
Piston stroke84.5 mm (3.33 in)
79 mm (3.11 in)
90 mm (3.54 in)
Block materialCast iron
Head materialAluminum
ValvetrainDOHC 4 valves x cyl.
Compression ratio17.0:1, 17.3:1
Combustion
TurbochargerFixed or variable geometry
Fuel systemCommon rail direct injection
ManagementDelphi or Bosch
Fuel typeDiesel
Cooling systemWater-cooled
Output
Power output74–139 hp (55–104 kW; 75–141 PS)
Torque output112–251 lb⋅ft (152–340 N⋅m)

1.1 L (D3FA)

The 1.1 L (1,090 cc) U diesel engine is a 3-cylinder version of the 1.5L U series unit and is made with cast iron block and aluminum cylinder head with chain driven DOHC with 4 valves per cylinder, Delphi common rail direct injection (CRDi), variable geometry turbocharger (VGT) and intake air swirl control. Bore and Stroke are 75 mm × 84.5 mm (2.95 in × 3.33 in). It creates 74 hp (55 kW; 75 PS) at 4,000 rpm and 112 lb⋅ft (152 N⋅m) of torque at 2,000 rpm. It is one of Hyundai's most efficient engines - using 4.2 L/100 km (67 mpg‑imp; 56 mpg‑US), and emits 112 g/km of CO2. The engine also incorporates a 1½ engine order balance shaft mounted under the crankshaft driven by helical gears to manage engine vibration. It is currently fitted to the Kia Picanto, Kia Rio, Hyundai i10 and i20 models.

1.2 L

The 1.2 L (1,186 cc) U diesel engine utilizes three cylinders and is made with cast iron block and aluminum cylinder head with chain driven DOHC with 4 valves per cylinder. It produces 75 PS (55 kW; 74 hp) and 19.4 kg⋅m (190 N⋅m; 140 lbf⋅ft) of torque.

1.4 L (D4FC)

The 1.4 L (1,396 cc) U diesel engine utilizes four cylinders and is made with cast iron block and aluminum cylinder head with chain driven DOHC with 4 valves per cylinder, Bosch common rail direct injection (CRDi), fixed geometry turbocharger (FGT) and intake air swirl control. It is a reduced stroke version of the 1.5L U series with Bore and Stroke at 75 mm × 79 mm (2.95 in × 3.11 in). It produces 90 hp (67 kW; 91 PS) and 162 lb⋅ft (220 N⋅m) of torque in base Hyundai i20 and i30 GD models and 89 hp (66 kW; 90 PS) and 162 lb⋅ft (220 N⋅m) of torque in higher spec Hyundai i20 and Kia Rio models.

1.5 L (D4FA)

The 1.5 L (1,493 cc) U diesel engine has four cylinders and is made with a cast iron block, aluminum cylinder head with chain driven DOHC (4 valves per cylinder), Bosch common rail direct injection (CRDi), variable geometry turbocharger (VGT) and intake air swirl control. Bore and stroke are 75 mm × 84.5 mm (2.95 in × 3.33 in). It produces 89 hp (66 kW; 90 PS) and 159 lb⋅ft (216 N⋅m) torque in the Hyundai Getz and 108 hp (81 kW; 109 PS) at 4,000 rpm and 174 lb⋅ft (236 N⋅m) of torque at 2,000 rpm in the Kia Rio and higher spec Hyundai Getz models. Introduced in 2005 this engine replaced the 1.5L 3-cylinder D-engine common rail Diesel sold in the Hyundai Getz and Accent models which was notably less refined.

1.6 L (D4FB)

The 1.6 L (1,582 cc) U diesel engine (known as D4FB) from the Žilina Kia factory in Slovakia is a bored-out version of the 1.5 litres (1,493 cc) U series engine, 77.2 mm (3.04 in) versus 75 mm (2.95 in). It is a "best in class" diesel engine in the world. In 2009, it was refined to the 1.6 U2 version, with a new displacement, developing 126 hp (94 kW; 128 PS) and 195 lb⋅ft (264 N⋅m) of torque.[2]

Engine specification
  • Displacement: 1.6 L (1,582 cc)
  • Bore x Stroke: 77.2 mm × 84.5 mm (3.04 in × 3.33 in)
  • Compression Ratio: 17.3:1
  • Power: 89 hp (66 kW; 90 PS) or 113 hp (84 kW; 115 PS) or 126 hp (94 kW; 128 PS)
  • Torque: 173 lb⋅ft (235 N⋅m) or 188 lb⋅ft (255 N⋅m) or 195 lb⋅ft (264 N⋅m)

Applications

1.7 L (D4FD)

The 1.7 litres (1,685 cc) U2 diesel engine (known as D4FD) was introduced at the 2010 Paris Motor Show. It produces 139 hp (104 kW; 141 PS) and 251 lb⋅ft (340 N⋅m) of torque.[3] This engine features chain driven DOHC with 4 valves per cylinder, common rail direct injection (CRDi), variable geometry turbocharger (VGT).

1.7 CRDI

  • Displacement: 1.7 L (1,685 cc)
  • Bore x Stroke: 77.2 mm × 90 mm (3.04 in × 3.54 in)
  • Compression Ratio: 17.0:1
  • Power: 84 kW (113 hp; 114 PS) or 104 kW (139 hp; 141 PS) @ 4000 rpm
  • Torque: 260 N⋅m (192 lb⋅ft) or 340 N⋅m (251 lb⋅ft) @ 2000-2500 rpm[4]

Applications

See also

References
  1. "Hyundai Introduces New R-Diesel Engine". Auto Report. 5 November 2008. Retrieved 2012-07-09. The R-Engine brings Hyundai's diesel engine family fully up-to-date as it joins the U-Engine (1.1-liter, 1.4-liter and 1.6-liter), the A-Engine (2.5-liter) and S-Engine (3.0-liter V6).
  2. http://www.automobilesreview.com/auto-news/hyundais-u2-16-crdi-achieves-bestinclass-performance-compact-vehicles/4708/
  3. http://worldwide.hyundai.com/WW/Corporate/News/News/DF_GT_GLOBALNEWS_217.html?testValue=&title=DF_GT_GLOBALNEWS_222&selx2=
  4. "i40 brochur" (PDF). hyundai.co.nz. Hyundai New Zealand. Retrieved 13 October 2014.
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