Launch X431 Scopebox - Page 92

LAUNCH X431 GDS Scopebox Manual
subject to the actual engine ignition sequence)
Four-stroke in-line four-cylinder: 1—2—4—3, or 1—3—4—2
Four-stroke in-line six-cylinder: 1—5—3—6—2—4, or
1—4—2—6—3
—5
Four-s
troke in-line eight-cylinder: 1—8—4—3—6—5—7—2
Five-c
ylinder: 1-2-4-5-3
V 6 engine: generally speaking, based on the person sitting on the
driver cab, if the right side c
ylinder 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.
The Figure 4-2 shows the normal ignition waveform of distributor
ignition system, the upper one is the secondary waveform, the lower
one is the primary waveform.
The section A is the opening of contact point; section B is the closing
of contact point,
during which the ignition coil is charing.