The Multijet direct injection system represents
the most technologically advanced Common Rail system capable of
carrying out 5 injections per cycle controling the quantity injected
and the injection pressure (1350 bar max) independently of the engine
rotation speed.The engine management control unit is capable
of managing the introduction of small quantities of fuel (pre and
post pilot injections) in addition to the main injection (the quantity
of fuel injected to provide the performance requested by the driver)
depending on the engine speed and load conditions, guaranteeing
particularly 'soft' engine operation in all situations.To reduce exhaust emissions, an electrically
activated EGR valve which is managed directly by the engine management
control unit, a recirculation exhaust gas cooling system and a close
coupled catalyzer have been adopted.A fixed geometry turbocharger and intercooler
are responsible for the supercharging.Thanks to the electronic management described
above, this engine conforms to the latest anti-pollution and continuous
control regulations in accordance with the EOBD system (European
On Board Diagnosis); this system permits continuous diagnosis of
the vehicle components relating to emissions, and indicates to the
user, by switching on the relevant warning light and displaying
the message on the instrument panel, any deterioration in these
components. The system is also controlled by means of
special relays located in the engine compartment junction unit.
The supply lines to the control unit and the various system components
(sensors and actuators) are protected by special fuses, also located
in the control unit.