April 5, 2005

GM and Delphi launch Displacement on Demand

Troy, Michigan – As part of a powertrain technology strategy to improve fuel economy, General Motors launched the Vortec 5300 V8-powered 2005 Chevrolet Trailblazer EXT and GMC Envoy XL with new valve train technology developed by the Delphi Corporation. Displacement on Demand cylinder deactivation technology improves the fuel economy of these SUVs by up to eight per cent.

GM has indicated that it expects to equip as many as two million vehicles with Displacement on Demand by 2008. The system seamlessly deactivates half of the engine’s cylinders under certain driving conditions.

Similar systems are already in use on DaimlerChrysler’s Chrysler 300C and Dodge Magnum, and on Honda’s Odyssey minivan and Accord Hybrid sedan.

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