Mazda Motor Corp.'s crown jewel, the impending next-technology rotary engine (invented by Felix Wankel but perfected by Mazda's Kenichi Yamamoto) has engine engineers buzzing with anticipation as to just how much advanced technology will be employed. A given, of course, is the new side exhaust-port (SEP-RE) version that will completely eliminate intake-exhaust overlap, resulting in greatly improved low-load combustion quality, hence markedly improved fuel economy and emissions (see WEVTU — ...

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