Suzuki EN125-2A, Руководство по обслуживанию

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TRANSISTORIZED IGNITION SYSTEM WITH ELECTRONIC ADVANCE
DESCRIPTION
SPECIAL FEATURE
200
100
O
O
2 4 6 8 10
Engine r/min (x 1000 r/min)
Fig.2
Closing
angle
(Degree)
1.0
0.5
2 4 6 8 10
Engine r/min (x 1000 r/min)
Fig.3
Electric
current
(A)
On the Model EN125-2A, the timing advance characteristics of the ignition timing have been changed
from the previously-employed mechanical timing advance system incorporating a centrifugal advance
governor to an electronic timing advance system.
The ignitor has the following functions:
(1)Revolution advance angle control
Controls ignition timing in response to engine r/min.(See Fig.1,)
(2)Closing angle control
The introduction of this new electronic timing advance system minimizes fluctuations in the ignition
timing and also has improved the timing advance performance during high-speed operations.
When engine speed is low, reduces the conducting period (closing angle) of the transistor (Tr) so
that power consumption is reduced; when engine speed is high, increases the conducting period
(closing angle) to prevent voltage drop of the ignition coil. (See Figure 2 and 3.)
0 1 2 3 4 5 6 7 8 9 10 11
Engine r/min (x 1000 r/min)
Fig.1
Advance
angle
(Degree)
BTDC
13 BASE
O
0
20
10
30
19.0 2.8 /4500rpm
O O
16.9 3 /7000rpm
O O
Signal generator
Signal rolor
Pick-up coil
(A)
(B)
Ignitor unit
(Tr)
( C)
Ig
1
Ig
2
Ignition coil
Spark plug
Battery
Ignition switch
1-3 GENERAL INFORMATION