Fiat 1.3 MultiJet Series II SDE Engine

The Fiat 1.3 MultiJet engine is a turbocharged thermal engine for diesel cars comprising four cylinders in line, equipped with the revolutionary Common Rail injection system patented by the Fiat group and its equipment subsidiary Magneti Marelli in 1996. This injection principle has evolved and the second generation launched in 2009 was dubbed MultiJet.

History

The evolution of the Common Rail system in its second and third generation resulted in the MultiJet II & III system. The small Fiat 1.3 MultiJet diesel engine is fitted to many models of the Fiat group with the brands Alfa Romeo, Lancia, Fiat Automobiles & Fiat Professional under the references M-Jet & JTDm, but also many other models of foreign manufacturers who have renamed the Fiat engine, sometimes manufactured under license, DDiS by Suzuki, Ecojet by DR Motor Company, TDCI by Ford, CDTI by Opel and General Motors, HDI by Peugeot and Citroën and Quadrajet by Tata.

The feature that mainly differentiates the technology of the first-generation Common Rail and the current MultiJet is combustion, slower and more gradual for the same quantity of diesel burnt in the cylinder. The principle adopted was to increase the number of fuel injections, from two in the engine with the UniJet system to five. Compared to the Common Rail injection system, the MultiJet provides for the introduction of other types of injection, called pre and post, up to a total of five, which allows better management of the cold engine and regeneration. particle filter. This development of direct injection gave a strong increase in the general efficiency of the engine, in particular at low speeds and significantly reduced noise and the level of pollution in the exhaust. Consumption was thus reduced to below 5 bolts per 100 km in average consumption.

The injection system is managed by a Magneti Marelli electronic control unit which can permanently change the logic of the injections according to the parameters recorded, the engine speed, the torque required to ensure the required speed and the outside temperature of the engine and coolant. The diesel supply pressures are limited to 1,400 bar on the Fiat 1.3 MultiJet 16V.

With the Multijet II version, launched in 2009, new injectors fitted with hydraulic valves can control with extreme precision the quantity of diesel fuel injected into the combustion chamber with a particularly rapid sequence of injections. Up to 8 consecutive injections can be obtained, i.e., 3 more than the first version.

 The different names of the engine Fiat 1.3 MultiJet 

• The American group General Motors and its European subsidiary Opel rename the Fiat 1.3 MultiJet engine under the project code Z13 and in the commercial brochures CDTI (acronym for C ommonrail D iesel T urbo I njection) .
• Suzuki renames the DDiS engine (acronym for D iesel D irect i njection S uzuki) .
• Alfa Romeo calls this engine M-JET and JTDm (the m for Multijet ),
• Tata renames the Quadra Jet engine,
• the French group PSA (Peugeot and Citroën) renamed it HDI, like their direct injection turbodiesel engines,
• DR Motor Company calls it Ecojet,
• Ford renames it TDCI.

At the end of 2009, Fiat Powertrain presented the evolution of the 1.3 MultiJet engine, the new 1.3 Multijet II. This is an important development of the MultiJet system patented by Fiat and its subsidiary Magneti Marelli, based on a new injection system that is faster and more precise. This new system makes it possible to obtain up to 8 consecutive injections instead of the 5 previously, to place a new particle filter closer to the engine so as to improve the combustion of the last small residues of polluting particles inside the engine. filtered, (Fiat patent) which stops the engine during vehicle stops when the gear lever is in neutral. The power of the new Fiat 1.3 MultiJet II engines are 75 HP DIN for the turbocharged variant with fixed geometry turbine with a torque of 190 Nm at 1,750 rpm while the version with variable geometry turbine develops 95 HP DIN with torque from 190 or 200 Nm at 1,500 revolutions per minute.

This new Fiat 1.3 Multijet II engine, developed by the new Fiat Powertrain Technologies structure, adopts a special injector, patented by FPT, and the system is managed by a Magneti Marelli electronic control unit.

This new engine was presented at the Frankfurt Motor Show in September 2009on the occasion of the launch of the new Fiat Punto Evo. A version with a power reduced to 90 Hp DIN fitted the new Fiat Doblo with December 2009 until autumn 2010 with a torque of 200 Nm at 1,500 rpm. From ‘October 2010, the Fiat Doblo only fitted the Fiat 1.6 MultiJet engine. The new engine has been approved according to Euro 5 standard.

This engine was also fitted to the Alfa Romeo MiTo, Opel Corsa D, Meriva B and Astra J models but also on the Lancia Musa, Fiat 500 (2007), Fiat Qubo, Suzuki Swift, Chevrolet Aveo, French minivans and utility vehicles Citroën Nemo / Peugeot Bipper and their utility versions.

From 2012, Fiat launches a version derived from the 95 Ch DIN whose power is reduced to 85 Ch DIN which retains the variable geometry turbine. This version equips the latest evolution of the Fiat Punto III, renowned for its extremely low fuel consumption and the lowest pollutant emissions in the category. The entry-level versions of the Fiat 500L and Alfa Romeo MiTo also benefited from this engine.

With the appearance of the new Multijet II system, Fiat Powertrain Technologies has inaugurated a new nomenclature for the designation of its automobile engines: the Fiat 1.3 is now part of the SDE class (acronym for S mall D iesel E ngine, i.e., Small Diesel Engines). The 1.3 Multijet II weighs 130 kg, like its predecessor, and is still manufactured at the Fiat plant in Bielsko-Biała , Poland.

Summary versions of the engine Fiat 1.3 MultiJet II Series II 16V engine 75-85 HP