DISI
includes a whole new set of innovations for gasoline engines. To
mention a few, direct injection (including cooling the air-gasoline
mixture), a new combustion chamber geometry, variable timing technology,
and nanotechnology for the catalyst. This all makes the engines consume
20 percent less while getting 15 to 20 percent better performance.
Further developments for its diesels: new direct
injection technology (most European automakers are switching to
piezoelectric injectors), making the engine lighter, DPF, and urea
technology to reduce NOx emissions
Mazda’s DISI* engines balance sporty driving with
outstanding environment performance. With the next generation engine in
the series, we are aiming for a 15% ~ 20% improvement in dynamic
performance and a 20% increase in fuel economy (compared with a Mazda
2.0L gasoline engine). Based on the direct injection system, we aim to
reduce all energy losses (see figure on the right) and improve thermal
efficiency through innovative engineering in a variety of technological
areas. Among these technologies we are paying particular attention to
direct injection, combustion control, variable valve system technology
and catalyst technology. Also, among the various fuels on the market, we
are studying the use of flex-fuel.
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