At the upcoming Geneva Motor Show, Mazda Motor Corporation will introduce the SKYACTIV-D 1.5, a newly developed small displacement diesel engine. The 1.5-liter diesel will join the SKYACTIV-D 2.2 diesel and SKYACTIV-G 2.0 gasoline engine already in the product lineup.
Introduced in 2011 (earlier post), the 2.2L SKYACTIV-D engine reduces fuel consumption compared to the older 2.2L MZR-CD diesel by 20% due to a low 14:1 compression ratio and subsequently greater expansion phase after combustion. SKYACTIV-D was also one of the first diesels to comply with Tier II Bin 5 North American emission regulations without requiring expensive selective catalytic reduction (SCR) aftertreatment or a lean NOx trap catalytic converter (LNT).
However, in January, Mazda North American Operations said it would delay the introduction of the SKYACTIV-D diesel in North America from the original target of Spring 2014. Mazda said that the although the SKYACTIV-D can meet emission regulation requirements without the use of a NOx after-treatment system, it decided that further development is required to deliver the right balance between fuel economy and “Mazda-appropriate” driving performance. (Earlier post.)
Mazda will also unveil the Mazda HAZUMI next-generation subcompact car concept at the show.