Injection-Ignition System; Injection System Technical Characteristics; Injection Time (Injection Volume) - MV Agusta Brutale Oro-S Workshop Manual

INJECTION-IGNITION SYSTEM

The injection-ignition system is of the "alpha/N" type. The motor r.p.m. and the throttle position are used as main
parameters to measure the amount of intake air to find the amount of fuel to be injected.
The amount of intake air for each cycle depends on the density of the air in the intake collector, the single displa-
cement and the volumetric efficiency: this last is determined experimentally on the engine for the entire functio-
ning range (rounds and engine load) and it is stored in the dimensioned plans (maps) inside the EPROM of the
electronic CPU.
The motor r.p.m. and the throttle angle also allow to calculate the ignition advance best suited for any functioning
condition.
The other system sensors (atmospheric pressure sensor, air temperature sensor, water temperature sensor and
trimmer sensor) allow to adjust the basic strategy, in specific functioning conditions.
The injector control is of a semi-sequential type, that is to say, the four injectors are controlled in couples accor-
ding to the intake sequence.
The ignition is of the static inductive charge type with control of coil charge time integrated into
the power modules inside the CPU.

INJECTION SYSTEM TECHNICAL CHARACTERISTICS

INJECTION TIME (INJECTION VOLUME)

The factors for the determination of the injection time are the basic injection time that is calculated on the basis
of the r.p.m. of the engine, the opening of the accelerator and various compensations that are determined accor-
ding to signals coming from various sensors that reveal the condition of the engine and the riding conditions.
Camshaft position sensor Sensore posizione albero motore
Sensore posizione acceleratore
Accelerator position sensor
Various sensors
Sensori vari
Injectors Iniettori
Air intake injection system
Segnale apertura acceleratore
- 3 -
Engine r.p.m. signal
Segnale velocità motore
Accelerator opening signal
Various signals
Segnali vari
Injection signal
Segnale iniezione
D
TEMPO
BASIC
INJECTION INIEZIONE
DI BASE TIME
ECU
COMPEN-
COMPENSA
SATION
ZIONE
TEMPO
FINAL
INIEZIONE
INJECTION
FINALE
TI?E