| Hyundai U engine | |
| Manufacturer: | Hyundai Motor Group |
| Production: | 2004–present |
| Configuration: | Straight-3 or Straight-4 |
| Fueltype: | Diesel |
| Fuelsystem: | Common rail direct injection |
| Coolingsystem: | Water-cooled |
| Management: | Delphi or Bosch |
| Block: | Cast iron |
| Head: | Aluminum |
| Valvetrain: | DOHC 4 valves x cyl. |
| Turbocharger: | Fixed or variable geometry |
| Displacement: | 1120cc 1186cc 1396cc 1493cc 1582cc 1685cc |
| Bore: | 75mm 77mm 77.2mm |
| Stroke: | 79mm 84.5mm 85.8mm 90mm |
| Compression: | 17.0:1, 17.3:1 |
| Power: | NaN0NaN0 |
| Torque: | NaNkgm |
| Predecessor: | Hyundai D engine |
| Successor: | Smartstream D1.5/D1.6 |
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]
The 1120cc 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 NaNmm. It creates 71- at 4,000 rpm and 15.6- of torque between 1,750 and 2,500 rpm.
It is one of Hyundai's most efficient engines with a fuel consumption of 4.2L/100 km, 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.
The 1186cc 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 750NaN0 at 4,000 rpm and 19.4kgm of torque between 1,750 and 2,250 rpm.
The 1396cc 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 NaNmm.
It produces 900NaN0 at 4,000 rpm and 22.4- of torque between 1,500 and 2,500 rpm.
The 1493cc 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 NaNmm. It produces 890NaN0 and 1590NaN0 torque in the Hyundai Getz and 1080NaN0 at 4,000 rpm and 1740NaN0 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.
The 1582cc U diesel engine (known as D4FB) from the Žilina Kia factory in Slovakia is a bored-out version of the 14931NaN1 U series engine, 77.2mm versus 75mm. In 2009, it was refined to the 1.6 U2 version, with a new displacement, developing 1260NaN0 and 1950NaN0 of torque.[2]
The 16851NaN1 U2 diesel engine (known as D4FD) was introduced at the 2010 Paris Motor Show. This engine features chain driven DOHC with 4 valves per cylinder, common rail direct injection (CRDi), variable geometry turbocharger (VGT).[3]
1.7 CRDI