The global concept for this new combustion system is based on the following key characteristics:

·       Breakthrough combustion system

o    Ultra-lean mixtures

o    H2 boosting

o    Pre-chamber ignition system

o    Optimized intake ports

o    Smart coatings

·       Optimized NOx after-treatment systems

·       Optimized base engine

·       “Ultra-lean” mixtures enhanced by H2 addition and advanced ignition system.

·       Very high tumble motion to support the turbulence formation and the combustion process.

·       Heat insulation thanks to specific coatings.

·       High stroke-to-bore ratio.

·       High compression ratio (above 12:1).

·       Miller approach.


A combination of these different engine technologies allow to lower the losses and consequently to increase the efficiency.