Mazda's highlight at the Tokyo Motor Show is their newly developed SKY engine besides the Kiyora concept which was shown last year. Kicking things off with the Sky-G engine which is 2.0 liter unit with direct injection and an improved variable valve timing system which gives it a 15% fuel economy and torque advantage over the current MZR engine in the Mazda 3 2.0 Sport. The Sky-G engine now incorporates Direct injection which was usually found on the higher end turbocharged 2.3 liter engine. The SKY-D 2.2 liter diesel engines managed a 20% improvement on fuel efficientcy over the current 2.2 liter oil burner. To achieve this feat Mazda had the engine block designed in order to reduces mechanical friction to the level of a gasoline engine. Other features include piezo injectors and a two-stage turbocharger.
Equally as important is the transmission system of a vehicle as there is significant power loss taking place there. The Mazda Sky-Drive is a redesign 6-speed automatic that significantly reduces mechanical friction, a revised torque converter and clutch with minimized slip, and an optimized lock-up mechanism.
Bringing these technology together in the Kiyora results in an impressive mileage of 32 km per liter of fuel under the Japanese 10-15 cycle test. The kiyora will be powered by a 1.3 liter SKY-G engine with 6-speed transmission delivering power to the wheels. (start-stop technology & regenerative breaking is included in the technology list of Kiyora)
Source : Mazda
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