Wednesday, October 08, 2014

Hyundai Displays New Automatic Gearbox and New Petrol Turbo Engines at Paris Show

At the 2014 Paris Motor Show, South Korean auto maker Hyundai has unveiled its first 7-speed dual-clutch automatic transmission. The manufacturer states that the new gearbox provides "an improvement in fuel consumption and CO2 emission compared to a conventional six-gear automatic transmission, while acceleration performance also improves".

The 7DCT (Dual Clutch Transmission) consists of two dry clutches and an actuator for each clutch. Through this system, engine power is transferred independently into the odd and even gear train, ensuring it is ready to shift into the next gear without any interruption in torque. For best responsiveness, the electric motor-driven actuator is applied, while the external damper ensures NVH (noise vibration harshness) levels remain low during driving.

In addition to the above mentioned transmission, Hyundai has also displayed two new turbocharged petrol direct-injected (T-GDI) engines, which includes a 1.0-litre three-cylinder unit that will be installed in the new international i20. The smaller unit is a 998cc powertrain based on the company's existing Kappa 1.0 litre MPI engine, which has been altered with new technologies such as direct petrol injection and a small, single-scroll turbocharger. This engine can be tuned to produce 118 bhp of power and 171.6 Nm of peak torque.   

The 1.0 litre T-GDI engine comes with an electronically controlled wastegate to optimise flow and improve low-end torque and throttle response. It is fitted with a 6-hole GDI injector, pressured to a higher-than-average 200 bar for clean combustion and improving fuel economy and emissions. With the help of a split-cooling concept, the engine manages different temperatures in the cylinder head and block area, reducing warm-up times and improving efficiency.

The second new engine is the Kappa 1.4-litre T-GDI unit, the successor to the Gamma 1.4-litre engine. At 87 kg, the engine's base weight is 14kg lower that the Gamma engine, and the unit is also more compact. It makes use of a high-pressure single-scroll turbocharger integrated within the exhaust manifold. This helps to improve throttle response time and low-end torque. It can be tuned to churn out 115bhp of power and of 210 Nm of maximum torque.

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