The project was focused on research and development (RaD) of alternative, environmentally and energy friendly compressed natural gas (CNG) engines with lower emissions and better performance and consumption. The project has had a strong RaD base, which brought together a small company oriented in development and construction of prototypes, a big engineering company with the potential to apply the results of the project as a technological added value to their products, and one of the leading academic institutes in the field of internal combustion engines.