Technical data

Aprilia Consumer Service Spa
Technical Service and Training
Release 4 july 99
This material is didactic and
may be changed following the technical
development of the product
Compensation devices:
1. Atmospheric pressure sensor
2. Engine coolant temperature sensor
3. Intake air temperature sensor
4. Gear position (idling switch)
Other significant compensation factors:
- Battery voltage
- Starting compensation (engine warming)
- Delta Alpha compensation:
-
- boosts the engine fuel supply during rapid acceleration
- cuts off the fuel during deceleration
Positioned inside the control unit box. Reads the
Patm.
The control unit normally reduces the injection volume
in low atmospheric pressure conditions
This sensor reads the coolant temperature. If the
temperature reading is low, the control unit increases
the injection times
This sensor reads the temperature of the intake air; if
the temperature is low, the injection time is increased
This logic sensor verifies whether or not the gearbox is
in the neutral position. The signal also affects the
phasing.