Ferrari 2006 F430 Spider, Руководство пользователя

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6 - Technical information
131
The engine cooling system has a closed-
circuit with an expansion tank which
compensates the fluid volume and pressure
variations due to the engine warming
up. A filler neck with a cap, fitted with a
valve calibrated to 14.21 psi (0.98 bar), is
installed at the top of the tank.
Coolant circulation is activated by a
centrifugal pump (with bypass incorporated
in the thermostatic valve) coupled to the oil
pump unit (see page 129 ) and driven by the
crankshaft by means of a chain.
After cooling the engine, the coolant flows
to the thermostatic valve which starts
opening when the temperature reaches
185 °F (85 °C), sending the coolant to the
radiators.
The radiators are positioned on the front
of the vehicle in order to improve the
heat exchange. The right-hand radiator is
installed in series with the condenser for
the air conditioning system. The hydraulic
steering system cooling coil is mounted on
the left-hand radiator.
Each radiator is fitted with an electric fan
to assist with the heat dissipation. The
radiators are connected in parallel and are
equipped with a pipe that is connected to
the expansion tank for self-bleeding of the
system.
The pump is connected to the radiators by
means of pipes running lengthwise under
the floor of the vehicle.
Fitted on the delivery pipe connecting the
two radiators is a twin contact switch for the
automatic activation of the electric fans and
a water temperature sensor for the engine
ECU.
Replacing the coolant
The coolant must be replaced at the
intervals shown in the “Maintenance
Schedule” by an Authorized Ferrari
Dealer
.
Ignition-Injection System
The system is composed of the following:
• two electronic control units;
• two air-flow meters;
• engine status sensors (throttle angle,
RPM, timing, ignition, etc.);
• engine control and emission actuators
(electro-injectors, coils, solenoid valves,
etc.);
• peripheral functions connected with
engine operation.
The ECU regulates the quantity of fuel
to be delivered to the injectors and
corrects ignition timing to optimize engine
efficiency on the basis of the engine RPM
and the quantity of air taken in by the
engine.
Each exhaust manifold is fitted with a
double linear (front) and non-linear (rear)
oxygen sensor.
Electronic accelerator (Drive by Wire
system)
Drive by Wire is a system that allows the
accelerator pedal to work independently
from the throttle.
This system is equipped with a
potentiometer connected to the accelerator
pedal in the place of the connection cable.
This potentiometer informs the engine
ECU of the torque request from the driver.