Hyundai has used its annual powertrain conference in Korea to unveil a new Atkinson cycle 1.6 litre engine petrol engine, which will form part of Hyundai’s future hybrid strategy.
Also shown at the conference is a new front-wheel-drive eight-speed automatic transmission which will find its way into Hyundai’s larger vehicles.
Kappa 1.6 GDI Engine
The new Kappa 1.6 GDI engine will be available from 2016 and will appear under the bonnet of Hyundai’s coming hybrid and plug-in hybrid vehicles.
The engine utilises an Atkinson combustion cycle, which favours efficiency over power, and features cooled exhaust gas recirculation, and a long stroke specification to maximise thermal efficiency.
Split thermostat cool allows the block coolant to run at a higher temperature compared to the cylinder head, speeding warm up times, while suppressing knock and improving fuel economy.
Direct injection is supplied by six-hole laser drilled fuel injectors, with the high pressure fuel system capable of a maximum 200bar delivery pressure for more precise delivery reducing emissions and fuel consumption.
Overall the new engine, and its associated technologies, is able to achieve 40 percent thermal efficiency, 10 percent higher than a comparable standard engine.
Outputs for the Kappa 1.6 GDI are rated at 77kW and 147Nm - any shortfall from the new engine will be supplement by the electric motor teamed with the new engine in Hyundai’s as yet unannounced hybrid Prius challenger.
Front Wheel Drive Eight-Speed Automatic
A new eight-speed automatic, designed for front wheel drive applications has also been shown, able to improve fuel consumption by 7.3 percent compared to Hyundai’s existing six-speed automatic.
As well as a wider spread of gear ratios, the new transmission offers a multi-disc torque converter, 3.5 kg reduces weight, direct control valve body, and a re-engineered oil pump.
The new features are designed to reduce friction losses, improve gear shift times and feel, and offer fuel economy improvements.
The new transmission is designed to be coupled with the company’s Lambda, Theta turbo and R family of engines as seen in vehicles such as the Santa Fe, Sonata and Tucson in Australia.
Hyundai has yet to announce when the roll-out for the new transmission will begin.
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