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| TU/EC engine | |
|---|---|
_10.JPG) TU1JP engine in a 1999 Peugeot 206 | |
| Overview | |
| Manufacturer | PSA Peugeot Citroën |
| Production | October 1986 – present |
| Layout | |
| Configuration | Naturally aspirated Inline-4 |
| Displacement | 1.0 L (954 cc) 1.1 L (1,124 cc) 1.3 L (1,294 cc) 1.4 L (1,360 cc) 1.5 L (1,527 cc) 1.6 L (1,587 cc) |
| Cylinder bore | 70 mm (2.76 in) 72 mm (2.83 in) 75 mm (2.95 in) 77 mm (3.03 in) 78.5 mm (3.09 in) |
| Piston stroke | 62 mm (2.44 in) 69 mm (2.72 in) 73 mm (2.87 in) 77 mm (3.03 in) 82 mm (3.23 in) |
| Cylinder block material | Aluminium, Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC 8-or 16-valve with VVT (some versions) |
| Combustion | |
| Fuel system | Solex or Weber carburetors Central fuel injection Multi point injection Indirect injection (Diesel engines) |
| Management | Magneti Marelli, Bosch or Lucas |
| Fuel type | Petrol or Diesel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 45–125 PS (33–92 kW; 44–123 hp) |
| Emissions | |
| Emissions target standard | Euro III, Euro IV |
| Emissions control systems | Catalytic converter |
| Chronology | |
| Predecessor | PSA-Renault X-Type engine Simca Poissy engine |
| Successor | PSA EP engine (Prince engine) (for TU engines) Ford DLD engine (for TUD engines) |
The TU family of small inline-four piston engines by PSA Peugeot Citroën were introduced in 1986 and used in the Peugeot and Citroën range of cars. It was first installed in the Citroën AX in October 1986, replacing the X family, although it shared many components with its predecessor. The TU is available in either petrol or a naturally aspirated diesel variant, the latter called TUD.
The TU engine is distantly related to the older X-Type engine - sharing a similar overhead camshaft architecture, but the key differences are the belt driven camshaft (the X is chain driven), and that the TU is mounted in a conventional upright position with a separate, end-on mounted transmission and unequal length drive shafts. The X engine, by comparison, had an integral transmission mounted on the side of the crankcase (giving rise to its popular nickname the "suitcase engine"), sharing a common oil supply and was mounted almost lying flat on its side within the car.
After the engine debuted in the Citroën AX in 1986, it quickly began replacing the X engine in most of its remaining applications - the Peugeot 205, Citroën BX and Citroën C15 had all transitioned by 1988 whilst it replaced the Simca "Poissy" engine in the Peugeot 309 in 1991. It is/was also used in the following cars: Citroën: AX, Saxo, C2, C3, C4, BX, ZX, Xsara, Nemo and Berlingo. Peugeot: 106, 206, 207, 306, 307, 405, Bipper, Partner and Hoggar, the Iranian Peugeot 405 and Peugeot Pars TU5 as well as and IKCO Runna.
The TUD engine was only used in 11 cars of which 6 were non-PSA models: the Citroën AX, Citroën Saxo, Citroën Xsara; Peugeot 106, Rover Metro/100-series, Nissan Micra, Maruti Suzuki Zen D/Di and Maruti Suzuki Esteem D/Di and IKCO Samand, and the Tata Indigo 1.4 TD. The Tata's is a smaller version of the TUD engine, based on the 1.5D.
PSA has now stopped production of original TU engines, although EC engines, closely related to the TU5 unit, are still in production for emerging markets such as China and Russia and available in 1.6, 1.8 and 2.0 litre versions [citation needed].
The IKCO EF engines by Iran Khodro would share some relation to the TU engines, which were designed jointly by Iran Khodro and F.E.V GmbH of Germany.