Injection time control

Injection time control

The ECU controls the injection opening time with extreme speed and accuracy according to the following:

• engine load (rpm and air intake)
• battery voltage
• engine coolant temperature.

Injection is sequential and timed for each cylinder. "Injection start" is optimised. "Injection end" is constant.

Spark advance

The ECU can compute, thanks to a map saved in its memory, spark advance on the basis of the following:

• engine load (minimum, partial, full, according to rpm and air intake)
• inlet air temperature
• engine coolant temperature.

Spark can be postponed only on the cylinder requiring it which is recognised be means of the values registered by the rev and timing sensors.

Idle control/handling

Idle status is acknowledged by the ECU via the potentiometer integrated in the idle actuator located on the throttle (valve axis).

The ECU controls idling ratio (850 ± 30 rpm) according to the devices in use by:

• changing spark advance
• piloting the throttle position (0° ÷ 15°), by means of the idling actuator, to control air intake.