Akademik Veri Yönetim Sistemi
Özener O., Ergenç A. T., Bey E.(Yürütücü), Akpınar G.
TÜBİTAK Projesi, 2013 - 2014
The injector used in common rail
diesel engines plays an important role for fulfilling the predefined
performance and emission targets. The injector nozzle is exposed to high
temperatures. In this context, the dynamic conditions of the nozzle play a
major role in both the design of the nozzle and the selection of the
nozzle material. After the design and
manufacturing phase, the nozzle is sent to the customer for field tests and the
temperatures to which the nozzle is exposed and the hardness degrees of the
nozzle material are examined. Within this method the nozzle material selection
is validated. The engine conditions
which the last generation injectors operate are constantly getting harder and
the temperatures to which the nozzle material is exposed is always changing. This phenomenon has led to the need of recognition and
identifying the degree of effects of the parameters that has an effect on
material hardness.In this research the nozzle material hardness drop was
investigated via using 3 different engine cycles that can led to higher
temperatures in combustion chamber in a 1.6 liter common rail diesel engine. As
a result of the research on the nozzles subjected to engine tests with
different test cycles and durations, the heavy engine operating conditions are
identified for injector nozzles and the parameters that has an effect on
hardness are analyzed. It was aimed to make reliable designs with a better
understanding of the most favorable conditions and engine test cyle for the
right decisions.