Abstract
The paper presents research work carried out with the main goal to innovate existing standard production 1.4-liter DMB gasoline engine. A number of modifications have been applied to improve engine quality and performances. The main modifications are: optimized gasoline injection system, new intake manifold, new camshaft material, modified valve gear with new valves, springs and hydraulic tappet, improved sealing etc. The innovate engine has 59 kW maximum power (20% higher than standard engine) and 112 Nm maximum torque at full engine load, as well as almost 20 % lower minimum specific fuel consumption at part load.