Mazda's new Miller-cycle engine will power the new Mazda2, (named the Demio for the US).
Mazda Motor Corporation has developed a new, naturally aspirated 1.3-liter Miller-cycle gasoline engine, which will power the all-new Mazda2 when it goes on sale in Japan in July 2007. The Miller-cycle engine usually depends on having a really big super charger but Mazda has figured out a way to use the Miller-cycle on a normally aspirated engine.
The Miller-cycle is a fancy name for a simple change in the valve timing for an engine. It allows the compression stroke of a 4-cycle engine to begin later than typical. Less power wasted on compression means more efficiency.
In combination with Mazdaâ€™s first continuously variable transmission (CVT), the engine enables the new Mazda2 to offer 54 mpg US, an improvement of approximately 20% compared with Mazdaâ€™s current 1.3-liter engine model.
In addition to the new powertrain, the all-new Mazda2 has been made approximately 220 lb lighter than its predecessor through a strict weight reduction program, which results in quick handling to go along with the significantly improved fuel economy.
I can see no reason that the Miller-cycle engine can't be used to improve the efficiency of larger engines and/or engines in hybrids. I wonder what the carbon footprint of a Miller-cycle hybrid car running on cellulosic ethanol would be?Via Green Car Congress
written by Sandman, June 15, 2007
written by Hun Boon, June 15, 2007
written by Neale, June 16, 2007
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