Bosch, Getrag of Germany Collaborate to Develop New Hybrid Drivetrain Options

Motor, Nov 2007

Under the banner of "Ecology Needs Dual Power," the German transmission manufacturer Getrag has joined forces with Bosch to develop a new concept in hybrid drivetrains. Unveiled at the recent Frankfurt Motor Show, the concept features a dry dual-clutch transmission linked to an electric rear axle. Getrag also announced the latest transmissions in its PowerShift range, introducing variants with both wet and dry dual-clutch systems.

The range of parallel hybrid systems planned will use Getrag sixspeed PowerShift transmissions and Bosch electrical architecture for the alternator, electric drive system and power electronics. The resulting systems will feature modular designs that offer considerable flexibility in the hybrid drivetrain. Getrag claims that lighter and less complex electric components are used, with many parts common to the PowerShift transmission used with nonhybrid powertrains.

As for transmissions in the company's revised PowerShift range, wet-clutch systems will be the first to be marketed. Volvo will be the first customer for the six-speed 6DCT450, which has a torque rating of 330 ft.-lbs. and a maximum ratio speed of 6.5:1, followed by Ford. The transmission will be used in conjunction with a 2.0L diesel engine. The first PowerShift dry-clutch transmissions will come out in 2009.