MV Agusta F4 1000 S, Руководство по ремонту

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ECU
The ECU is situated under the tank behind the cylinder
blocks.
The ECU consists of a CPU (Central Processing Unit),
a memory unit and I/O sections (input/output).
The signal of each individual sensor is sent to the input
section and then to the CPU. On the basis of the sig-
nals received, the ECU calculates the volume of fuel
and the ignition advance necessary by utilising pre-
pared schemes for the various conditions of the engine
and sending them respectively to the injectors and the
ignition coils.
SENSORS
ATMOSPHERIC AIR TEMPERATURE/PRESSURE
The suction air sensor ( 1 ) is situated on the right suc-
tion duct in the front part of the vehicle and indicates
both the atmospheric pressure and the air temperatu-
re.
1 INTAKE AIR PRESSURE SENSOR
The sensor ( 2 ) reveals the pressure of the intake air
and this pressure is therefore converted into voltage
that is sent to the ECU.
The signal involved has a double purpose, one
being that of phasing the injection and ignition of the
cylinders and the second being that of adjusting the
base fuel injection time (volume); this is in fact
determined depending on the tension of the signal
(output tension).
The voltage increases when the pressure of the
intake air is high.
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Air intake injection system
D
1
2
Output voltage
(V)
Pressure of the
intake air (mmHg)
High
High
Low
Low