Ignition-Injection System - Ferrari 612 scaglietti Owner's Manual

Ignition-Injection System

Each cylinder bank is equipped with an integral Bosch Motronic ME
7.1.1 ignition-injection system controlled by a microprocessor ECU.
The ECU regulates the quantity of fuel to be delivered to the injectors
and corrects ignition timing to optimise engine efficiency on the basis
of the engine rpm and the quantity of air taken in by the engine.
Main system components
Throttle potentiometers
The potentiometers are located on the motor-driven throttle bodies on
both cylinder banks. They allow the ECU to continuously monitor the
opening of the motor-driven throttles.
Electro-injectors
There is one electro-injector per cylinder: they spray the fuel directly
into the intake manifold.
The electro-injectors on each bank operate sequentially and on a timed
basis, that is, they are activated based on the engine firing order, with
the ECU determining the timing and duration of injector opening.
Ignition coils
The coils used are of the closed-circuit type. Each coil is connected
to the corresponding spark plug by means of an extension, in silicon
material with high dielectric specifications.
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, which replaces the connection cable.
This potentiometer informs the engine ECU of the torque requested by
the driver.
Accelerator pedal position sensor
This is mechanically mounted on the accelerator pedal.
It reads the exact position of the pedal.
Motor-driven throttle body
It is installed between the air-flow meter and the engine plenum
chamber.
This device includes a throttle valve, a direct current motor and two
potentiometers (checks on the angular position of the throttle).
With the Drive by Wire system, it is possible to obtain:
• optimal vehicle control by means of the CST system;
• integration of the F1 system to optimise gearshifting;
• engine warm-up phase management.
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