Abstract Throughout the world, many efforts are being made to improve the thermal efficiency of automotive internal combustion engines (Sellnau et al. in GDCI multi-cylinder engine for high fuel efficiency and low emissions 2015). In this paper, the AVL 475 cc GDI Single Cylinder Research Engine 5405 was tested over a range of steady-state operating conditions using a modern injection system. Calibration mapping was conducted over a wide range of operating conditions, in order to optimize the combustion. The tests was made at Transilvania University of Braşov, ICDT—Research & Development Institute. This tests include simulations for different engine loads and regimes, modifying one by one the engine’s intake parameters, operational parameters and atmospheric conditions. The mixture formation and combustion processes of the fuel will be monitored through the test bed component software, AVL FIRE Commander 7.06c—IAV, AVL PUMA Open Test Bed Automation and AVL Indicom software. In order to optimize the combustion, the engine map was modified. The main parameters that was changed are: the amount of fuel per cycle, ignition timing for first and second injection, excess air factor λ, for different intake pressures, engine speeds and loads. In the next figure is presented the engine map for the analyzed engine.
Optimizing Combustion in an Single Cylinder GDI SI Engine
1st ed. 2016
2015-11-26
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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