High mileage, low emissions: GM revisits sparkless compression ignition engines

GM’s global HCCI team will continue to refine the technology in the wide range of driving conditions experienced around the globe, from extreme heat and cold to the thin air effects of driving at high altitude.

“Although our development costs for HCCI have been substantial, we have made tremendous strides in bringing this most awaited combustion technology out of the lab and onto the test track with the Vauxhall Vectra and Saturn Aura concept vehicles. Additional development costs, including research and testing programmes are required to make the technology ready for the great variety of driving conditions that customers experience,” said Prof. Grebe.