ENGINE DIAGNOSTIC TEST PROCEDURES
MEASURE SMOKE INTENSITY
- 400 Series On-Highway
(with Robert Bosch MW Pumps)
FROM FORM NO. CGED-365
MEASURE SMOKE INTENSITY*
MEASURE AT FULL LOAD & RATED SPEED (RPM)
*Engine must be at normal operating temperature.
p Refer to "Performance Data Guidelines", in this section.
The smoke sampling kit (SE-2580) is used to measure
smoke levels at the exhaust stack at full load and rated
The smoke sampling kit (SE-2580) sampling pump
draws off a precise amount of exhaust gas from the
exhaust pipe of the respective engine and then sucks it
through a filter paper disk.
The filter paper disk, in turn, darkens during this process
and thus gives the measure of the soot content of the
exhaust gases. The filter disk is then compared to the
Bacharach Oil Burner Smoke Scale (Chart C). The
Bosch smoke number is then determined and compared
to the standards given in the Performance Data
Guidelines, in this section.
Printed in United States of America