17
IGNITION AND INJECTION
17 - 21
For starting the oxygen sensor as soon as possible after the engine start up it should be
heated by its electric resistance, type
PTC
= positive temperature coefficient.
The evacuation track of the burned gases should be 100% sealed in the area in front of
the
ë
rod and of the catalytic converter in order to not get measurements errors of the
oxygen content in the burned gases.
Reference values:
-
heating resistance of the ë rod: R
1-2
= 1 – 15 Ù
- R insulation = R
1-4
= R
1-3
= R
2-3
= R
2-4
> 25 MÙ at 20 °C
IMPORTANT:
Only fuel without lead should be supplied. Otherwise the oxygen sen-
sor and the catalyst will be broken. The oxygen sensor and the catalyst are damaged in
case of overheating caused by a difficult starting up or by an improper functioning of
the engine.
The correlation between the value
ë
and the dosing of the mixture is indicated in the
diagram here under.
The voltage limit values are
U ë = 0.9 V
for a rich mixture and
U ë = 0.1 V
for a poor
mixture. The value
U ë = 0.45 V
, existing between these two, is the reference voltage
existing in the computer memory; the later uses it in case of damage of the
ë
rod, the
engine being under running.
The value
ë
1
= 1 ± 002
is the area of the voltage jump characteristic to the ceramic
element (
ZrO
2
in this case).
A voltmeter with internal resistance
R
i
= 10 MÙ
is used for measuring the voltage generated
by the
ë
rod. This voltmeter will be connected to the
ë
rod (
pins
3
and
4
) or to the elec-
tronic control unit (
pins 9
and
10
).
Mixture
rich
Mixture
poor
DESCRIPTION OF THE SYSTEM
vnx.su
Содержание 1304 2004
Страница 17: ...DRAINING AND FILLING 05 05 2 GEARBOX Draining plug 2 Filling plug 1 vnx su ...
Страница 18: ...DRAINING AND FILLING 05 05 3 REAR AXLE DIFFERENTIAL Draining plug 2 Filling plug 1 vnx su ...
Страница 48: ...10 10 14 ENGINE AND LOWER ENGINE UNITS TIGHTENINGBY SCREWINGUPMOMENTS vnx su ...
Страница 114: ...STARTING AND CHARGING 16 16 6 ALTERNATOR TYPE 1180 ALTERNATOR vnx su ...
Страница 196: ...MANUAL GEARBOX 21 21 2 GEARBOX 50C SECTIONS vnx su ...
Страница 197: ...MANUAL GEARBOX 21 21 3 SECTIONS GEARBOX 51C vnx su ...
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Страница 199: ...MANUAL GEARBOX 21 21 5 DIFFERENTIAL 51C DIFFERENTIAL 365 SECTIONS vnx su ...
Страница 256: ...GENERAL 30 TIGHTENING MOMENTS daNm FRONT DRIVING AXLE 30 2 1 5 6 4 4 5 9 23 5 6 5 11 9 5 8 vnx su ...
Страница 257: ...GENERAL 30 TIGHTENING MOMENTS daNm FRONT NON DRIVING AXLE 30 3 1 5 5 11 9 5 8 5 9 23 4 4 5 6 5 vnx su ...
Страница 258: ...GENERAL 30 TIGHTENING MOMENTS daNm REAR DRIVING AXLE 30 4 1 54 2 5 24 6 3 vnx su ...
Страница 259: ...GENERAL 30 TIGHTENING MOMENTS daNm REAR UNDRIVING AXLE 30 5 2 5 9 6 5 24 1 54 vnx su ...
Страница 400: ...40 GENERAL 40 7 OPENINGS CLEARANCES vnx su ...
Страница 475: ...AIR CONDITIONING 62 62 3 A C CIRCUITOPERATINGDIAGRAM Warning grup vnx su ...
Страница 529: ...83 INSTRUMENT PANEL 83 1 INSTRUMENTS PANEL SERIES 5136 SÃCELE vnx su ...
Страница 564: ...89 ELECTRICAL DIAGRAMS 89 3 ANTISTARTING GENERALITI ES vnx su ...