4. FUEL INJECTION SYSTEM
4-12
Ignition System
1. Principle of operation:
The engine is equipped with a computerized ignition control system that collects signals from
TDC/crankshaft position sensor, throttle position sensor, temperature sensor, and intake
temperature as well as pressure sensor. Then, correspondence with engine RPM, this 8-bite
micro-computer in the system is to control ignition timing properly. The secondary coil creates
25000~30000V high voltage to ignite the spark plug by means of the transistor to open/close
operation of the primary current inside of the computerized system. Such operation not only have
max engine performance output but also increases fuel consumption ratio.
2. Specification
1) Ignition timing: BTDC 13°/1600RPM
2) Spark plug:
NGK CR8E
Gap: 0.7~0.8mm
3) ACG
Pulse generator coil: 120
＋
10%
Ω
(G/W-Y)
4) Ignition coil:
Primary circuit: 0.63 ± 0.03
Ω
(20
℃
)
5) Battery:
Type: YTX9A-BS.8Ah
Capacity: 12V 8Ah
ACG/flywheel gear
ring (24-1 tooth)
TDC/ crank
position sensor
Throttle valve openness
Intake temperature/pressure
Engine temperature
rpm/TDC
Diode
Ignition coil
Spark plug
ECU
