Hyundai is featuring their New Generation i30 CNG at this year’s Paris Motor Show, marking the debut of their 1.4-liter T-GDI engine and a new seven-speed dual-clutch transmission (DCT).
The engine coupled with the transmission emits CO2 emissions as low as 87 g/km, a significant reduction compared to the equivalent internal combustion engine (ICE) model, and meets the strict Euro6c emission standards three years ahead of introduction in 2017. Running on CNG, the engine develops 117 ps and maximum torque of 206 Nm from 1,500 rpm to 3,500 rpm.
The CNG is stored in an innovative rectangular tank within the floor pan, ensuring interior space remains the same as its ICE counterpart. Lined with a gas-impermeable polyamide matrix (inside) and protected by high-performance glass-fibre reinforced plastic (outside), the new system provides a high-strength, low-cost solution to gas storage, and weighs 50% less than the equivalent steel tank.
Up to 15 kg of gas can be stored in the tank at 200 bar pressure. A new electrical pressure regulator lowers gas pressure to an operable state in two steps, first to 20 bar and then to 4 to 11 bar, which is fed into the engine. The bi-fuel power plant uses both gasoline and compressed natural gas as fuel, with the flexibility to automatically switch to gasoline once the supply of CNG has been used.
Seven-speed dual-clutch transmission
This is the first time that Hyundai is presenting a dual-clutch transmission with seven gears, combining the benefits from automated and manual transmissions. The 7DCT provides an improvement in fuel consumption and CO2 emission compared to a conventional six-gear automated transmission, while acceleration performance increases.
The 7DCT consists of two dry clutches and an actuator for each clutch, and engine power is transferred independently into the odd and even gear train to always be ready to shift into the next gear without any torque interruption. For optimized responsiveness the electric motor-driven actuator is applied, while external damper improve the noise vibration harshness during driving.
(Source – Hyundai Global)