Abstract

The EAGLE project (Efficient Additivated Gasoline Lean Engine) aims at improving the energy efficiency of European road transport vehicles by developing a highly efficient gasoline engine adapted for future electrified powertrains.

The maximal efficiency of gasoline engines is usually lower than 40% because of various energy losses. By combining new advanced technologies, the EAGLE project is designing an innovative engine concept to reach a peak efficiency of 50%. This new concept will thus support the European automobile industry to reach the forthcoming CO2 emissions target of 50 g CO2/km while complying with standards in terms of particulates and NOx emissions.

The engine efficiency will be significantly increased by the use of advanced insulating coating materials and ultra-lean mixtures (with a high excess air). However, the flame propagation being unstable in lean mixtures, the combustion process will be supported by a high cylinder charge motion, an advanced in-volume ignition system and the use of hydrogen.