10.1.2005
GM showcases latest propulsion technology
The Opel Astra Diesel Hybrid and the GMC Graphyte showcase the new two-mode full hybrid technology that is based on the multi-patented hybrid-electric diesel technology. This technology is pioneered by GM in urban transit buses and will be co-developed by GM and DaimlerChrysler for applications in GM, Chrysler Group and Mercedes Car Group vehicles.
The third concept is the GM Sequel, showing GM's next-generation fuel cell power system. With a 25-percent more powerful fuel cell stack, it helps Sequel achieve a 480 km range and 0-100 kph acceleration in less than 10 seconds.
Opel Astra Diesel Hybrid
The Opel Astra concept vehicle demonstrates the easy scalability of the innovative two-mode full hybrid system. It is combined with a 1.7-liter CDTI 92-kW- (125 hp) engine to deliver up to 25 percent improved fuel economy while maintaining fun-to-drive performance.
The unique architecture of the two-mode full hybrid system includes two electronically controlled electric motors, which act on a series of gears to create an infinitely variable drive system. The system fits within the space of a conventional automatic transmission. A battery pack supplies power to the electric motors and also allows for full-electric propulsion. As a packaging study, the Astra Diesel Hybrid demonstrates how hybrid components can be integrated into a compact car without compromising passenger comfort and the vehicle's utility. The nickel-metal-hydride battery pack is located in the spare tire well.
With fuel consumption below 4-liters/100km (MVEG mix), the Astra Diesel Hybrid is projected to be 25 percent more fuel-efficient than comparable diesel models.
GMC Graphyte
The GMC Graphyte concept vehicle is a refined SUV with all the capability expected in a four-wheel-drive truck, but with 25 percent improved fuel economy enabled by GM's latest two-model full hybrid propulsion system. It is combined with a Vortec 5300 V-8 with Displacement on Demand (DoD) technology, to deliver strong, continuous power in all driving conditions.
GM Sequel
Sequel is the first fuel cell vehicle that delivers the range and performance people expect from their current vehicles, bringing fuel cell vehicles much closer to commercialization.
The fuel cell power module consists of the fuel cell stack, the hydrogen and air processing subsystems, the cooling and the high-voltage distribution system. This power module delivers 73 kW of high-voltage power for the electric traction motors, as well as auxiliaries like HVAC (heating, ventilation and air conditioning), by-wire electronics and the battery. The system design has evolved and the components are becoming simpler, which is helping drive down the cost of technology and bringing the program one step closer to reality.
Sequel's 480 km range is made possible by advances in high-pressure storage that enable the vehicle to carry 8 kg of hydrogen, more than double that of GM's HydroGen3 fuel cell vehicle. Three lightweight, carbon composite tanks store hydrogen at 700 bars. Also, the GM Sequel will have enhanced braking, accelerating and handling characteristics by substituting by-wire technology for traditional mechanical systems.