Volvo 819 E Service Manual page 58

Group 28 Igni tion s ystems
Design and fun ctio n
EZ - 115K
EZ-115K - No. 1 cylinder detector
Since the B 280 eng ine is equipped w ith twin knock
ab le t o distinguish between the two in
tension lead t o No. 1 cylinder is
The device consist s of a
in the coi l by the HT cu
rect firin g order at all times.
control unit to retard t
56
- System desc riptions
o rder to determ ine which
fin ed w ith an inductive detector (15).
coil (16) w ou nd on a core (17
rrent in the lead as the
The signal is also
he ign it ion in the cyl inder affected
sensors (one fo r each bank of
cylinder
) surrounding the ignition lead
cyl inde r fires is the signal
u sed to id entify an individua
.
cylinders), the
is kno cking. For this
(18). The cu
u sed by the con trol unit t
l cyli nder affect ed by
be
control unit must
purpo se. t he high-
rrent p ulse induced
o m ai ntain the co r-
knock, enabling the