What do you think of this?
"Homogeneous charge compression ignition, or HCCI, is the black art of of internal combustion engines that aims to produce diesel-like fuel efficiency for the cost of gasoline. Although some of its competitors have developed and subsequently given up on the tech, Mazda confirmed that the next-generation of SkyActiv engines will employ HCCI technology, improving fuel economy by 30 percent and at the same time reducing exhaust emissions."
http://www.autoblog.com/2017/01/16/mazda-skyactiv-engines-hcci-2018/
http://www.autoblog.com/2017/01/16/mazda skyactiv engines hcci 2018/
"Homogeneous charge compression ignition, or HCCI, is the black art of of internal combustion engines that aims to produce diesel-like fuel efficiency for the cost of gasoline. Although some of its competitors have developed and subsequently given up on the tech, Mazda confirmed that the next-generation of SkyActiv engines will employ HCCI technology, improving fuel economy by 30 percent and at the same time reducing exhaust emissions."
http://www.autoblog.com/2017/01/16/mazda-skyactiv-engines-hcci-2018/
http://www.autoblog.com/2017/01/16/mazda skyactiv engines hcci 2018/