Kia refines transmission

Kia is looking to introduce its own seven-speed dual-clutch transmission (DCT) on new model within the next 12 months. DCTs combine the advantages of automatic and manual gearboxes by offering sportier driving and reduced fuel consumption compared to traditional transmissions. The new DCT will be the first of its type in a Kia and its engineers have been focusing on ensuring its complete reliability and vibration-free operation. “It’s the right approach,” says Todd McDonald, general Manager of Kia Motors NZ. “Kia has built an excellent reputation for technological excellence and you cannot afford to undermine that by hurrying the development process.” The DCT is being developed as a long-term replacement for the six-speed automatic transmission in most new models sold on these shores. Its technology utilises two dry clutches – each fitted with an electric motor-driven clutch actuator to improve fuel economy – and a pair of gear input shafts, one each for the odd and even ratios. This set-up enables the DCT to operate sequentially or to jump to any of its seven forward gears depending on the driver’s requirements. The continuous power delivery offered by the DCT minimises the loss of torque by the powertrain during gear shifting and ensures a smoother drive in all conditions. The wide-ratio coverage afforded to the engine by the seven-speed gearbox results in better fuel efficiency and performance over rival six-speed DCTs. Kia’s engineers have targeted a seven per cent improvement in fuel efficiency over the existing transmission. Reducing vehicle noise has also been a focus, with an external damper ensuring a high level of refinement in the DCT.