The Significance of Exterior and Interior Factors for the Service-Life Characteristics of Vehicle Engines 785071
The study was undertaken to investigate the difference between
theoretical and actual, shorter service-lives of vehicle engines
and to determine means of prolonging the service-lives. Test-stand
experiments were run with trial engines and measurements of engines
in urban service for buses and trucks were made over extended
operating intervals. Testing procedures applied spectrometric
analysis to the engine oil in order to examine impurities.
Results indicated that the greatest portion of impurities in
engine oil originated outside of the engine; generally, 70% or more
of oil impurities were of this source, the balance being produced
by wearing processes in the engine. This result points to the need
for better air filtration systems, which are believed to offer
prolonged service-lives. The paper establishes a design goal of a
maximum 70% impurities from exterior sources since the proportion
was higher in many engines.
Author(s):
Jozsef Fodor
Pages: 12
Event:
17th FISITA Congress (1978), Budapest, Hungary
Related Topics:
Test procedures
Trucks
Buses
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