Mazda will unveil a threesome of engine technology — the ‘Mazda SKY-G' direct-injection gas engine, the ‘Mazda SKY-D' diesel engine and the ‘Mazda SKY Drive' automatic transmission — at next month's Tokyo Motor Show. Details and engine pr0n below.

Mazda "SKY" Engines, Transmission: First Look

Next-generation, clean diesel Mazda SKY-D engine


Mazda's new SKY-D clean diesel engine boasts high fuel economy and output performance as well as low emissions. The newly designed engine block reduces mechanical friction to the level of a petrol engine. By optimising the pressure and temperature in the cylinders, the shape of combustion chambers, and the fuel injection rate, combustion begins at the best timing in terms of thermal efficiency. Specifically, by employing piezo injectors, a two-stage turbocharger and other technologies, fuel economy becomes approximately 20 percent better than the current 2.2-litre diesel engine. With this engine, Mazda has achieved fuel economy equivalent to the current Mazda2 (Demio in Japan) in a larger vehicle the size of a Mazda6 (Atenza in Japan).

Mazda "SKY" Engines, Transmission: First Look

Next-generation, direct-injection Mazda SKY-G petrol engine


Mazda SKY-G is a next-generation, direct-injection petrol engine with significantly improved fuel economy and output performance due to enhanced thermal efficiency. The engine block is newly designed to reduce mechanical friction and achieve an optimal air-fuel mix, and a direct fuel-injection system is employed for the wide variety of spray profiles that are possible, enabling the maximum expansion ratio to be achieved. Specifically, fuel economy and torque are improved by approximately 15 percent compared to Mazda's current 2.0-litre engine. This was achieved by adopting next-generation fuel injectors and a highly functional variable-valve timing mechanism. The engine enables fuel economy equivalent to the current Mazda2 (Demio in Japan) to be achieved in a larger vehicle the size of a Mazda3 (Axela in Japan).

Mazda "SKY" Engines, Transmission: First Look

Next-generation Mazda SKY-Drive automatic transmission


Mazda's next-generation SKY-Drive automatic transmission is highly efficient, contributes to substantially improved fuel economy and delivers a more direct feel compared with the current unit. It improves fuel economy by approximately five percent, due to a complete redesign that significantly reduces mechanical friction, a revised torque converter and clutch with minimised slip, and an optimised lock-up mechanism. A rapid clutch action was achieved by identifying the minimum amount of fluid necessary. This also helped to realise a direct feel similar to a dual clutch transmission.