Aprilia Consumer Service Spa
Technical Service and Training
Release 4 july 99
This material is didactic and
may be changed following the technical
development of the product
1.2 RSV 1000 FUEL INJECTION SYSTEM
The main features of the RSV MILLE fuel injection system are as follows:
1.
Possibility of setting the right air/fuel mixture in real time on the basis of the throttle valve
opening, the inlet manifold pressure and the engine running speed.
2.
Improved performance and acceleration response thanks to the SW which compensates the
air/fuel mixture in all engine running conditions.
3. Clean exhaust emission thanks to the fuel injection system.
Variable timing, depending on engine running states. At present, the system is not set up for
the use of the Lambda probe.
To determine the injection volume, vary the opening time of the injector; the greater the volume, the
longer the injection time. To determine the injection time, there are a number of different sensors
which increase or reduce the injection volume on the basis of the atmospheric pressure,
atmospheric temperature, engine coolant temperature, intake air pressure, accelerator position and
engine rpm.
The basic volume is given by the injection mapping and the sensors send the data to the electronic
control unit to compensate this volume in line with the running conditions of the engine/bike. There
are two maps in the E-Prom:
1.
Map
2.
Map
The figure shows the logic diagram for the Injection Volume calculation system.
This is the “basic” map that mainly covers the high rpm sector. The
injector opening time, i.e. the injection volume, is determined on the basis
of the rpm and the throttle valve opening angle.
n
/
α
D/J
The D/J map covers the engine low/medium rpm sector. The idling
system is governed by the D/J map. The volume of fuel injected depends
on the manifold pressure and the rpm.
MAPPE
ECU
COMPENSATION
SENSOR
INJECTION
VOLUME
INTAKE
PRESSURE
SENSOR
Pick-up
Paspir.
RPM
THROTTLE
‘SENSOR’
ANGLE