
EDC 7 Electronic Central Unit
A. Connector for components assembled on engine -
A1. Electro-injector connector -
A2. Connector for connections side boat.
Electronic Central Unit (or ECU) is the component operat-
ing the entire injection system. The process begins with the
start up of the main program and the run-up procedure that
enables to recall into the “RAM” those data which, having
characterized the engine management until the previous
stop, were stored into the non-volatile memory E
2
PROM by
the after-run procedure. After the run-up, the test of the
blink code light signalling EDC anomalies and the procedures
which lead to the start of the engine, follow; during such pro-
cedures presence and consistency of the sensors electric sig-
nals are checked.The start of the computer application rou-
tine of the time and injection advance, is preceded by the
conversion analogue-digital of the data coming from the sen-
sors. At the end of the processing, the final data still in digital
format, are transferred to the various final stages and power
which will control with the proper ways the electro-injectors
and the system actuators.
Air pressure / temperature sensor
It integrates a temperature sensor and a pressure one.
Positioned at the entrance of the intake manifod produces a
signal that is proportional to the absolute pressure value of
the intaken air and supercharged. This information together
with that one of the temperature enables to adequate time
and advance to the density of the comburent air, in order to
reach the maximum thermodynamic efficiency avoiding
harmful emissions and better grade of smoke. Pressure sen-
sor is a solid state with an amplifier electronic circuit adjust-
ed for thermic drift, while the comburent air temperature
sensor is a resistor with negative temperature coefficient.
It is connected to ECU EDC by pins A10, A21, A28 e A29
Pressure sensor is powered by a 5 V voltage and the out-
put voltage is proportional to the pressure detected. Tem-
perature sensor has a resistance of about 2,5 k
Ω
at 20 °C
temperature.
Atmospheric pressure sensor
Located inside the ECU, produces a useful datum to ade-
quate injection procedures to the different positive displace-
ment of the engine caused by the changes of the environ-
mental pressure conditions.
N60 ENT M37
OVERVIEW
1.44
APRIL 2004
04_060_N
Figure 54
04_061_N
Figure 55
A
A1
A2
Содержание N60 ENT M37
Страница 1: ...NEF ENGINE N60 ENT M37 TECHNICAL AND REPAIR MANUAL T E C H N O L O G I C A L E X C E L L E N C E ...
Страница 4: ...N60 ENT M37 IV APRIL 2004 ...
Страница 52: ...N60 ENT M37 OVERVIEW 1 52 APRIL 2004 ...
Страница 54: ...N60 ENT M37 TECHNICAL DATA 2 54 APRIL 2004 ...
Страница 60: ...N60 ENT M37 TECHNICAL DATA 2 60 APRIL 2004 ...
Страница 62: ...N60 ENT M37 ELECTRICAL EQUIPMENT 3 62 APRIL 2004 ...
Страница 92: ...N60 ENT M37 DIAGNOSTICS 4 92 APRIL 2004 ...
Страница 116: ...N60 ENT M37 DIAGNOSTICS 4 116 APRIL 2004 ...
Страница 118: ...N60 ENT M37 MAINTENANCE 5 118 APRIL 2004 ...
Страница 122: ...N60 ENT M37 MAINTENANCE 5 122 APRIL 2004 ...
Страница 124: ...N60 ENT M37 SERVICING OPERATIONS ON INSTALLED ENGINE 6 124 APRIL 2004 ...
Страница 139: ...SECTION 7 TOOLS Page TOOLS 141 N60 ENT M37 TOOLS 7 139 APRIL 2004 ...
Страница 140: ...N60 ENT M37 TOOLS 7 140 APRIL 2004 ...
Страница 146: ...N60 ENT M37 TOOLS 7 146 APRIL 2004 ...
Страница 156: ...APRIL 2004 OVERHAUL 8 156 N60 ENT M37 ...
Страница 164: ...APRIL 2004 OVERHAUL 8 164 N60 ENT M37 ...
Страница 181: ...OVERHAUL APRIL 2004 N60 ENT M37 8 181 ...
Страница 188: ...N60 ENT M37 OVERHAUL 8 188 APRIL 2004 ...
Страница 190: ...N60 ENT M37 SAFETY PRESCRIPTIONS 9 190 APRIL 2004 ...
Страница 193: ......