Every automaker faces the same challenge, namely producing fuel-efficient vehicles that meet the most stringent environmental standards. The situation is particularly tricky in North America: gas prices are reaching new highs and environmental regulations like California's are tougher than ever."Oil needs are consistently rising, in large part because of emerging countries like China and India. If our calculations are correct, global fuel consumption will be 71-percent higher 20 years from now. Therefore, we need to quickly develop alternative technologies that will combine the benefits of combustion engines and electric drivetrains," explained Charlie Freese, Executive Director of Diesel Powertrain Engineering at General Motors. With that in mind, hybrid vehicles will be at the forefront of GM's green strategy, which is likely to culminate with the introduction of the Chevrolet Volt and its E-Flex system. A recent tour of the automaker's laboratories allowed us to see how fast things are progressing.
| |
| 2007 Saturn Aura and Opel Vectra prototypes |
Diversified strategy Before going all electric, GM wants to diversify its operations by improving existing technologies and developing new ones. Despite doubts raised by Vice President Bob Lutz earlier this year, the company is leaning more and more toward diesel. "We realize that the North American market offers few avenues for small diesel-powered cars. Higher selling prices and higher fuel prices are making these cars less attractive and affordable. In fact, with a compact economy car, it might take you 400,000 miles to make any kind of profit," added Mr. Freese.With larger, thirstier vehicles like full-size pickup trucks, however, a fuel economy of 15 mpg translates into a 75,000-mile break-even period.Things are quite different in Europe, where diesel is cheaper than gasoline. So, GM will multiply its platforms and powertrains to reach consumers in every market. Overseas, GM dealers will soon offer a new 2.9L diesel V6 with the 2009 Cadillac CTS. This model won't make it to our shores, though.Here, the green powertrain strategy will center around a new 4.5L Turbo Duramax engine for midsize and full-size trucks. This 310-hp mill boasting higher torque ratings should be able to meet California's emission standards.
| |
| 2010 Duramax Diesel 4.5L V-8 Turbo |