TY - JOUR
TI - Effect of engine cylinder deactivation on fuel economy and crankshaft speed variations
AU - Tomić Miroljub V
AU - Knežević Dragan M
AU - Štavljanin Miloljub S
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1631
EP - 1642
PT - Article
AB - In this paper the cylinder deactivation technique in spark ignition engines was investigated. The potential of this concept was analysed using engine working cycle simulation model AVL Boost. The engine power output regimes corresponding to the vehicle moderate constant driving speeds were considered and the results show that at that low load engine operating regimes cylinder deactivation can enable fuel economy improvement of about 6%-13% and corresponding CO2 emission reduction. The angular speed variations of engine crankshaft under cylinder deactivation conditions were also analysed and it was found that the speed variations increase several times compared to the standard operation of the engine with all active cylinders.