Getrag Announces New Dual Clutch Generation as 6DCT250 Becomes its First Million-Selling DCT
October 29, 2012
With its second generation dry-clutch 6DCT250 becoming its first ever DCT to sell more than a million units, dual clutch specialist Getrag has announced a fresh line-up of third-generation DCTs aiming to take the fight to the new wave of nine- and ten-speed planetary automatics under development by suppliers and major automakers groups.
Dual clutch transmission solutions have traditionally offered substantially better efficiency than planetary devices, prompting fuel-economy conscious automakers to specify them in place of traditional automatics in order to keep corporate average fleet emissions to a minimum. Recently, however, a new generation of multi-speed planetary automatics is beginning to offer similar fuel consumption benefits to DCTs, undermining the latter’s principal advantage in the market.
The success of the DCT250 “goes to show we went for the right product from the start,” explained Ernie DeVincent, Platform Director in charge of the 6DCT250 at Getrag. “As of today, the 6DCT250 is still the transmission architecture with the fastest growing number of units produced. This rapid growth confirms that in this era requiring world class fuel efficiency, the 6DCT250 is an unquestioned market leader. We currently have orders from four major OEMs for this product.” Seeing increasingly good prospects in Asia, Getrag will also launch production of the 6DCT250 at its Chinese plant in Nanchang during 2013. The transmission will then be produced on three continents expanding the company’s global footprint.
Yet, says Mihir Kotecha, CEO of Getrag, “we do not rest on our laurels: we are already hard at work developing the next generation, the 7DCT300.”
Getrag’s riposte to the multi-speed planetaries is a seven-speed, wet clutch DCT which, in its initial version at least, is capable of handling torque outputs of up to 300 Nm. Crucially, the 7DCT300 is part of a modular family designed to minimise complexity and maximise economies of manufacturing scale across a wide variety of derivatives that include AWD versions and hybrids of different configurations.
“We have developed each module with enough flexibility and breathing space to make it easily adaptable to the different attributes required by different local markets,” said Getrag Chief Technology Officer Didier Lexa. “Benchmarking the 7DCT300 against CVTs and automatics has made the transmission best-in-class for launch, fuel economy, NVH, cost and ease of hybridization.”
While the 7DCT300 is designed for use in mid-sized and compact vehicles with front-transverse layouts and maximum torque of 300Nm, will later be joined at the high end by the seven speed transmission 7DCT500 and at the low end with the six speed transmission 6DCT150.
The transmission’s low dry weight of approximately 65kg makes it compatible with future lightweight vehicle platforms, says Getrag, while the gearshift actuation uses electromechanical shift-drum technology to reduce energy drain and to make it possible to add start/stop functionality without hardware changes. The new modular approach means that the transmission integrates the same type of high-speed e-motor as for the other hybrid versions of the company’s planned six-speed 6DCT150 and seven-speed 7DCT500, the firm’s announcement adds.
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