Exhaust Gas Values - tecnotest STARGAS Manuel D'utilisation

STANDARD TEST ________________________________________________________________________ STARGAS
6.4 -

Exhaust gas values

The value of the single gases (
volume.
The unburnt hydrocarbons (
PPM VOL. (Parts Per Million-Volume).
The corrected CO indicates the
satisfied simultaneously:
CO 0
≠ (different from zero)
CO CO
+ < 15* % (lower than 15 %)
2
CO
6 % (bigger/equal to 6 %)
≥
2
The applied formula is the following one:
(*)14 for LPG fed cars.
(*)12 for METHANE (CH
The corrected CO is always printed (with CO
percentage value has to be taken into consideration only when the corrected
CO value turns out to be different from the CO value.
The corrected CO indicates the value of the CO which is emitted by the
engine even when the vehicle exhaust system is not tight.
As a matter of fact the gas values are diluted by the air suction hence they
are not reliable.
The lambda coefficient is always calculated with the CO value.
The corrected CO value is to be taken into consideration only when the
values of measured gases have stabilised.
34
CO, CO
HC
) and Azote oxide values are expressed in
CO
when the following conditions are
) fed cars.
4
, O
) is expressed in percentage-
2 2
CO cor.
=
≥ 6%) together with CO. The
2
∗
×
( CO 15 )
( CO + CO )
2
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