X-431 Throttle User Manual
103
the right side cylinder numbers on the right side, from the front to the back are as
follows: 1, 3, 5; and the cylinder numbers on the left side, from the front to the
back are as follows: 2, 4, 6; then the ignition sequence is: 1－4－5－2－3－6. If
the cylinder numbers on the right side, from the front to the back are as follows:
2, 4, 6; and cylinder numbers on the left side, from the front to the back are as
follows:1, 3, 5; then the ignition sequence is: 1－6－5－4－3－2.
Figure 13-1 below shows the normal ignition waveform of distributor ignition
system, the upper one is the secondary waveform, and the lower one is the
primary waveform.
The secondary waveform
A section is contact open period; B section is make contact period, which is the
magnetizing field of ignition coil.
Fig. 13-1
1) Contact break point: the primary circuit of ignition coil cut off, the secondary
voltage was sensed and increased sharply
2) Ignition voltage: secondary coil voltage overcome the damper of high voltage
line, the contact breaker gap and the spark plug gap to release magnetizing
energy, 1-2 section is the breakdown voltage
3) Spark voltage: For the capacitor discharge voltage
4) Ignition voltage pulse: For the charge and discharge sections
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