Foreword - APRILIA pegaso 650 i.e. Service Manual

Pegaso 650 I.E.
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4.8.1 FOREWORD

The "heart" of the engine's management consists in the
electronic Engine Control Unit which manages and opti-
mizes the ignition and injection of the fuel.
– The ignition management depends on the specific
consumption levels. The engine control unit measures
the exact ignition angle based on the engine rpm sig-
nals and on the position of the throttle valves (quantity
of air).
– The engine control unit manages the injection time
(quantity of fuel) based on the rpm signal, the throttle
valve signal (quantity of air, pressure of induction pipe)
and correction factors of the various sensors.
– Every time the engine is switched on, the engine con-
trol unit checks the sensors and ignition coils, making
sure they are working correctly. In case of anomaly,
the diagnostic warning light "û" positioned on the
dashboard will blink.
– If the vehicle falls down, the safety devices provided
inside the electronic unit interrupt the ignition and the
injection of fuel.
When the vehicle is set on the side stand and a gear is
engaged, ignition is stopped, preventing the vehicle
from starting.
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CAUTION
Any modifications or variations made to the exhaust
system, intake system or the engine control unit may
result in serious damage to the engine.
The assembly, modification or use of non-original
parts shall cause any warranty to become void and
shall exempt the manufacturer from any liability.
Key
1) Signals
2) Driving shaft position sensor (engine rpm)
3) Throttle valve sensor (throttle valve position)
4) Other sensors
5) Electronic unit
6) Standard data
7) Correction factors
8) Ignition coil (ignition angle)
9) Injector (injection time)
Release 00/2002-02
FUEL SUPPLY SYSTEM
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