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Old 11-29-2006, 01:13 PM   #1
NYCshopper
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Default 2008 GMC Yukon Hybrid @ 2006 LA Auto Show

2008 GMC Yukon Hybrid @ 2006 LA Auto Show

http://www.speedsportlife.com/2006/1...-yukon-hybrid/



Press Release:
Quote:
GMC EXPANDS ITS PROFESSIONAL GRADE PORTFOLIO TO INCLUDE THE 2008 YUKON HYBRID
Design Meets Technology With the World’s First Two-Mode Hybrid System in an SUV

LOS ANGELES – The 2008 GMC Yukon Hybrid, featuring the world’s first two-mode hybrid propulsion system in an SUV, will offer consumers a 25-percent improvement in overall fuel economy when it arrives at dealerships toward the end of next year.

By utilizing innovative hybrid technology and Active Fuel Management™ cylinder deactivation technology, the Yukon Hybrid will deliver a spectacular combination of fuel efficiency and power, while maintaining the capabilities of a full-size SUV.

“GMC has always stood for engineering excellence, so we’re extremely proud to be the first to market with a two-mode hybrid SUV to further improve our segment-leading fuel economy while providing all the performance you expect from GMC,” said John Larson, general manager, GMC.

The GMC Yukon Hybrid is powered by an aluminum small-block Vortec V-8 engine that maintains important performance attributes of full-size trucks, such as towing at 6,000 pounds. To offset the added weight from the hybrid propulsion system, GM redesigned certain vehicle components to optimize aerodynamics. These design changes include a new hood, front and rear fascias and a sleek GMC grille.

While traditional full hybrid systems offer only one electric mode that is utilized during low-speed driving, GM is teaming up with DaimlerChrysler and BMW Group to co-develop the two-mode hybrid system, which is a patented fuel-saving technology with one mode for city driving and one mode for highway driving.

The first mode of the system is for low speed and light loads. In this mode, the hybrid system can operate with electric power only, engine power only and any combination of engine and electric power. When the first mode operates as electric only, fuel consumption is reduced in heavy stop-and-go traffic by shutting off the engine for extended periods of time and moving exclusively under electric power at low speeds.

The second mode is primarily used at highway speeds. In addition to electric assist, the second mode integrates sophisticated electronic controls, such as Active Fuel Management, cam phasing and late-intake valve closure, to allow even more efficient engine operation with electric motors less than half the size of a traditional “one-mode” hybrid system. Full eight-cylinder engine power is provided when conditions demand it, such as passing, towing or climbing a steep grade.

The two-mode system also leverages a four-speed automatic transmission and electronic controls in an integrated, powerful and compact system that can be used with gas and diesel engines, front- and rear-wheel-drive configurations and cars, trucks and SUVs.

“The GMC Yukon Hybrid will be equipped with unique powertrain technology that provides a terrific combination of fuel economy, performance and towing capability in a full-size SUV,” said Tom Stephens, group vice president, GM Powertrain. “The Yukon Hybrid’s 25-percent composite fuel efficiency improvement highlights GM’s commitment to save as much fuel as possible by applying hybrid technology to the highest fuel-consuming vehicles first


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Old 11-29-2006, 03:54 PM   #2
importdriver
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Default

Meh. Its okay...

But a 4 spd Auto? Get with the times...
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Old 11-29-2006, 04:45 PM   #3
scott_gunn
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2009 WRX 5spd hatch
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Quote:
Originally Posted by importdriver View Post
Meh. Its okay...

But a 4 spd Auto? Get with the times...
It's actually paired with a CVT and operates like a full CVT, but the four fixed ratios help out somehow. I'm not sure I understand it completely, but here's some more info on it.

http://www.goauto.com.au/mellor/mell...2571620012BE6C
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