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Measurement of the Exhaust Discoloration of Diesel Engines
Technical Paper
785083
Sector:
Language:
German
Abstract
Tests were conducted on Diesel engines to determine the cause of
exhaust discoloration. Results show that the discoloration occurs
for different reasons under different engine conditions (e.g.,
fully loaded, steady-state operation, full acceleration, etc.). The
paper correlates the different discolorations with their respective
engine processes. It is concluded that the present Hungarian
measurement standard is inadequate.
Under the assumption that commercial, city traffic is comparable
to personal vehicle traffic, the Europa-Test standard should be
adopted whereby the thickness of exhaust effluent is continuously
measured. Mechanisms employing light beams and sensors are in
development and could be readily installed in the end of the
exhaust pipe. Test results would be recorded along with other data
such as engine rpm, temperature, etc. Tests can subsequently be
done on any appropriate road rather than at test-stands. The
measurements would be more characteristic of actual engine
operations.