Ignition System (Tc) - Husqvarna TC 250 2010 Workshop Manual

Ignition system (TC)

In the Capacitor Discharge Ignition (C.D.I.) system, the capacitor is charged using
the power generated by the alternator. Alternator current is then discharged to
the primary winding of the ignition coil in a single discharge that it timed based
on the predetermined spark advance. The high voltage induced in the second-
ary winding of the ignition coil generates a strong spark across the spark plug
electrodes.
The digital electronic ignition system allows for timing curve adjustment accord-
ing to these factors:
- ENGINE RPM;
- POSITION OF CARBURETTOR THROTTLE VALVE;
- GEAR ENGAGED.
This system ensures optimal engine performance under any operating conditions.
The ignition will keep the engine running even in the event of a throttle valve or
gear sensor malfunction.
The electronic ignition system includes the following elements:
- Electronic control unit (1);
- Alternator (2);
- Spark plug (3);
- Gear sensor (4);
- Coil (5);
- Carburettor TPS (Throttle Position Sensor) (6);
- Engine kill switch (7).
ELECTRICAL SYSTEM
M.18 Part. N. 8000 H1489 (10-2009)