Sabtu, 13 Agustus 2011

Hyundai Veloster (2012)

Hyundai Veloster combines the style of a coupe and the functionality of a hatchback, while also incorporating an additional passenger-side door. In the past, some coupes have used smaller rear-hinged access doors. These coupes have always been compromised by having to open the driver-side door before the rear door could be opened, proving to be inconvenient for both the driver and passenger, and extremely difficult to operate in tight parking lot situations. Hyundai's fresh take here implements a conventionally hinged door on the passenger side of the Hyundai Veloster, providing safe and ready access to the surprisingly spacious rear seats. The passenger-side rear door handle is hidden to maintain the coupe design.

GAMMA 1.6-LITER GDI ENGINE

The all-new Gamma 1.6-liter four-cylinder engine is the smallest Hyundai engine to use Gasoline Direct Injection (GDI). GDI technology helps deliver estimated highway fuel economy of up to 40 mpg, lower emissions and higher reliability.

"Gasoline-direct-injection technology allowed Hyundai engineers to create an engine that is powerful, fuel-efficient, and has fewer emissions," said Hyundai American Technical Center Inc. (HATCI) powertrain director, John Juriga. "Despite its small size, it generates some big numbers, with both impressive horsepower output and up to 40 mpg on the highway."

Through the use of GDI, the Gamma 1.6-liter engine delivers an estimated peak output of 138 horsepower at 6,300 rpm and maximum torque of 123 lb.-ft. at 4,850 rpm. But GDI is only part of the story as the new Gamma also features Dual Continuously Variable Valve Timing, an electronic throttle control, a roller timing chain, variable induction and innovative anti-friction coatings such as CrN Physical Vapor Deposition (PVD) coating and Diamond Like Carbon (DLC) coating.

NEW SIX-SPEED DUAL-CLUTCH TRANSMISSION

Hyundai's commitment to making the Gamma engine extremely fuel efficient continues by pairing it with a standard six-speed manual transmission or an all-new, six-speed dual-clutch transmission (DCT) developed by Hyundai.

Hyundai's new DCT takes the benefits of a manual transmission, including low fuel consumption and sporty driving, and blends them with automatic transmission benefits, such as high comfort levels and smooth shift quality. In addition, the DCT enables direct connection for high efficiency and uninterrupted torque transfer during shifts. Automatic transmissions lose power and fuel economy in the torque converter.
Other improvements of a DCT over a traditional automatic include a five to six percent improvement in fuel efficiency as well as a three to seven percent improvement in acceleration performance.

Hyundai Veloster's DCT can be thought of as two traditional manual transmissions, each with its own clutch operating in parallel and alternating shifts. Hyundai Veloster is a six-speed with one clutch acting on gears one, three and five and the other used for two, four, six and reverse. This shifting process results in quick smooth transitions with none of the efficiency loss normally associated with torque convertors. The clutch actuator assembly features electric motors for actuation, and an external damper improves NVH.

This powertrain also has an Active Eco mode which modifies engine and transmission control for improved fuel economy that translates into more than a seven percent improvement in real-world fuel economy. more...

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