Mazda SPCCI uses spark plug as HCCI control factor; “air piston” to enhance compression

Green Car Congress
By mmillikinSep 8, 2017, 5:00 am326 pts
Gasoline HCCI (homogenous charge compression ignition) has been of interest to automakers for years, as the low-temperature combustion mode offers significant improvements in thermal efficiency and fuel consumption along with a reduction in NOx emissions compared to conventional spark ignition gasoline engines.…

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