Chrysler, meanwhile, has used its system on seven vehicles with 5.7-liter HEMI V8 engines, including SUVs such as the Jeep Grand Cherokee, Jeep Commander, and Dodge Durango, the Dodge Ram pickup and passenger cars such as the Chrysler 300C and Dodge Charger R/T. The systems provide fuel savings of 6 percent to 8 percent, company officials said.
The automaker has outlined plans to bring the technology into the V6 with its "Phoenix" family of engines, which are expected to arrive in the 2010 model year. Chrysler has not yet announced which vehicles will use the engines.
Greg Pannone, Chrysler's manager of powertrain systems development, said the engines help reduce carbon dioxide emissions in large numbers of vehicles while appealing to consumer interest in fuel economy.