http://www.themotorreport.com.au/32175/mazda-patents-direct-injection-rotary-engine-new-motors-on-the-way/

Rob Woods


It appears to be focused on combustion stability at idle
and light load. I see no reference to operation at our power levels.
Apparently with a long skinny combustion chambers and dual spark plugs
set at a specific distance apart the combustion stability is increased.
Probably the drop in BSFC is limited to a single digit improvement for car power
levels. 5% is implied. Certainly not in the double digit turbo compound category.
God knows how much R&D money they spent on this.  The geometry is similar
to the Super-Tec engine with the notable exception of the side exhaust port.

No mention is made of lean operation. Lean operation would pay off
big time if a way could be found to reduce NOX.

Paul Lamar