|The Hyundai Nuvis. Click to enlarge.|
Hyundai introduced its Nuvis concept crossover vehicle at the New York International Auto Show. The Nuvis, which Hyundai said hints at future-generation crossover design that blends attributes of a tall urban car and a premium utility vehicle, is powered by Hyundai’s Hybrid Blue Drive architecture, with lithium polymer battery technology from LG Chem. (Earlier post.)
Hyundai’s proprietary parallel hybrid drive system mates the 2.4-liter Theta II gasoline engine to a 6-speed automatic transmission and a 30 kW (205 Nm) electric motor. Hybrid Blue Drive has an all-electric mode and a parallel drive mode. This parallel hybrid drive architecture will serve as the foundation for future Hyundai hybrid drive vehicles, starting with the next-generation Sonata in the United States. (Earlier post.)
The nine major components of Hyundai’s Hybrid Blue Drive include:
- 30 kW electric motor, delivering 205 Nm of torque
- Regenerative braking system
- Integrated starter generator that enables the engine to turn off at stops and restart automatically under acceleration
- 5.3 Ah, 270V Li-ion polymer battery pack
- Optimized Theta II 2.4-liter engine
- 6-speed automatic transmission with an improved-efficiency electric oil pump
- Weight-efficient architecture coupled with a low drag coefficient
- Electric air conditioning compressor
- Hybrid power control unit
To maximize fuel economy, all of the Theta II’s major driveline and cooling system components have been optimized to reduce friction, while the crankcase has been filled with low friction oil. To further reduce fuel consumption, the Theta II’s engine management software, which governs injection pressure, engine cycle timing and exhaust retreatment rates, has been revised. This control strategy assures that maximum efficiency is achieved during gentle acceleration, while greater power is immediately available during full acceleration.
To ensure that the engine runs at lower RPMs, the top three gear ratios in the transmission have been extended. Fuel economy is further optimized through the latest electric motor-assisted steering system which reduces power drain and low resistance tires.
Estimated fuel efficiency for the Nuvis is 34 mpg US (6.9 L/100km) city / 35 mpg US (6.7 L/100km) highway.