Iveco N60 ENT M37, Technical And Repair Manual, Page: 42 / 194

The ratio between the pilot system time and the amount of
fuel delivered is a non linear characteristic and with narrow
limit of tolerance typical of every family of electro-injectors;
it is the basis of the injection data stored in the ECU.
The use of certified injectors is mandatory for the best effi-
ciency of the engine performance and the accuracy required
by the common rail system management.They must have the
characteristics foreseen, i.e.analogue to those used to make
up the mapping of the injection timing.
Injectors do not need calibration and due to the high accu-
racy degree of its components and the complexity of their
assembly, no replacement of any spare part of which they are
made of, has been foreseen. Pressurization valve of the electro-injector
backflow
A.To the tank - B. From the electro-injector.
Located in the rear part of the cylinder head, adjusts the
pressure in the backflow duct from the electro-injectors at a
pressure p = 1.3 ÷ 2 bar.
N60 ENT M37 OVERVIEW
1.42
APRIL 2004
Figure 52
04_057_N
A B