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
CONTROL STRATEGY
In the ignition phase, the control unit reads the starting, as shown in the separate figure.
The ignition phase starts in this way
(asynchronous/synchronous phase):
1. The control unit reads:
-
coolant temperature
-
throttle angle
-
engine rpm
-
Patm.
-
Battery voltage
These values determine the ignition time when the engine is started.
The mapping, based on the timing, is based on
BTDC (Before top dead centre), and depends on
the throttle opening angle and the engine rpm.
ECU
RELE’
AVVIA
M
BATTERIA
rpm
Throttle
angle