ITALY: Fiat to launch compact multijet 1.3-litre JTD turbodiesel next year
Fiat Auto will next year introduce a revolutionary new common rail turbodiesel engine, known as the 1.3 JTD 16v, that offers two highly innovative features: extremely compact dimensions that enable it to be fitted on small cars; and the sophisticated Multijet technology of second generation JTDs.
One of Fiat's second generation of JTD engines, the multijet and multivalve, the new motor is a supercompact engine (460 mm long, 500 mm wide and 650 mm high) with a capacity of just 1251 cubic centimetres but a 16 valve four cylinder in line structure that assures the car outstandingly comfort and great performance.
The unit's highly flexible structure also means it will be possible to adapt it for different applications.
Above all, this state-of-the-art power unit is engineered to reduce fuel consumption by 10% and achieve lower noise levels. Emission levels will also drop by 30 to 40% and this is enough to bring the unit to within EURO IV limits.
The control unit increases the number of injections during each cycle to a level higher than the current number of two. In this way, the same amount of diesel is burnt inside the cylinder but split to achieve smoother combustion.
The 1.3 JTD 16v will be built by FIAT-GM Powertrain Polska in the Polish plant of Bielsko-Biala.
The 1.3 JTD 16v Multijet is a 1251 cc four cylinder in-line power unit with a bore of 69.6 mm and a stroke of 82 mm. The four valves per cylinder are operated directly by a twin overhead camshaft system. Maximum power is 70 bhp for a torque of 170 Nm.
The new power unit features a chain-driven timing system with fingertip control, hydraulic tappets, a cast iron crankcase with an aluminium base and an aluminium cylinder head.
The cylinder head is also designed with highly efficient directional intake ports to ensure an optimum fuel mix despite the small bore. The 1.3 JTD engine is turbocharged by a turbocharger with wastegate and intercooler. A variable geometry version will also be available.
The power unit also features an electronically-controlled EGR system and an exhaust gas cooling device.