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Published on Mar 30, 2012
In diesel engines, combustion is initiated by compressing the diesel fuel until it ignites. This high-compression combustion results in the formation of nitrogen oxides (NOx) and soot. Mazda's SKYACTIV-D avoids this problem by achieving the world's lowest compression ratio (14.0:1) for a diesel engine, while still ensuring reliable and highly efficient combustion. It also improves fuel economy by 20% compared to our previous diesel engine.