Ferrari 2006 F430 Spider, Руководство пользователя

Страница: 133 / 154

6 - Technical information
133
The ambient air enters the active carbon
filter through an air pump controlled by the
engine ECU after passing through a filter
that prevents foreign matter from entering
the system. The diagnostic pump cyclically
over pressurizes the entire anti-evaporation
system in order to detect any leaks.
The filler neck is sized in order to allow
only unleaded fuel filler nozzles to be
inserted.
The fuel is supplied by the two submerged
electric pumps in the tank, which are
controlled by the ignition-injection ECUs.
The fuel pressure in the delivery line is
kept constant by a pressure regulator,
incorporated in the pump flange.
The tanks are fitted, on the upper section,
with ventilation valves (low vapor bleeding
type). These valves are connected to a
separator which collects and condenses the
fuel vapors.
After passing through the filters inside the
pumps, the pressurized fuel is sent to the
injector rails on the intake manifolds. This
is a “returnless” type system, i.e., no fuel is
returned to the tank.
The system is fitted with an automatic safety
inertia switch positioned in the passenger
compartment, which, in the event of a
collision, is designed to deactivate the fuel
pump relays.
The system is designed to prevent
atmospheric pollution caused by fuel
system evaporation.
The fuel vapors coming from the tank are
conveyed to the active carbon filter where
they are absorbed and retained.
With the engine running and depending
on the driving conditions, the Motronic
ECUs control the canister purge solenoid
valves so that the fuel vapors retained by
the carbon filter are drawn in by the intake
manifolds through the specific lines.