Benelli Tornado Tre Novicento 903, Workshop Manual, Page: 277 / 336

UK
277
MF9_UK
T T
T T
L I M I T E D E D I T I O N
IIIII
njection
P P
P P P
lant
8 INJECTION PLANT
8.1 ENGINE MANAGEMENT SYSTEM
8.1.1 DESCRIPTION OF THE SYSTEM
Each model is equipped with an electronic engine management system with a
control that includes both the ignition and the distribution of the fuel.
The electronic control module (ECM) receives information from sensors placed
around the engine and the cooling and suction systems, and calculates with precision
the anticipation of ignition and the fuel needs for all engine states and loads.
Moreover, the system has hardware diagnostic functions that conform to the
demands of the USA State of California for on board diagnostics.
These functions ensure that, in the case of faults in the system, the type of fault
and the engine data at the moment of fault are stored in the ECM memory.
The stored data can be retrieved by a Benelli dealer using the apposite service
equipment supplied to all Benelli dealers (see Axone imstruction manual).
In this way, a precise diagnosis of the fault can be carried out and the defect rapidly
repaired.
8.1.2 SYSTEM SENSORS
Suction air temperature sensor - placed in the air filter box. Considering that the
density of the air (and therefore the quantity of oxygen available for burning the
fuel) varies with the temperature, a suction air temperature sensor has been
provided.
Variations in the air temperature (and therefore the density of the air) are
compensated by adjusting the quantity of fuel injected at a level conforming to
clean combustion and low emissions.
Barometric pressure sensor - the barometric pressure sensor is incorporated
within the ECM and is connected to the air filter box by a flexible tube. The barometric
pressure sensor measures the pressure of the air in the air filter box. The density
of the air is calculated for this measurement and, when added to other information
to the ECM, the engine load is calculated.
With this information the quantity of fuel for the injector is calibrated, adapting itself
to the prevalent conditions.
Engine shaft position sensor (phase sensor) - placed on the right of the engine
near the engine shaft. The elbow position of the shaft sensor notes the movement
of a toothed wheel fixed to the right end of the engine shaft. The wheel has 21
equidistant teeth and a tripple sized tooth next to a space of triple dimension.
The triple dimension of the tooth and the space acts as a point of reference from
which the immediate position of the engine shaft is calculated.
The engine shaft position sensor is used by the ECM to determine the position of
the engine shaft in relation to the point at which the fuel is injected and the need to
ignite the fuel.
Engine refrigerant liquid temperature sensor - placed on the right of the cylinder
head. The information about the temperature of the refrigerant liquid received by
the ECM is used to optimise the supply of the temperature of the engine to all and
to calculate the supply needs in hot and cold starts.