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Magotan geared for success
By Patrick Whiteley (China Daily)
Updated: 2009-09-21 08:48
The automatic transmission is one of the most revolutionary technologies the motoring world has ever seen, turning a complicated transport contraption into a user-friendly machine. When automatic gearboxes appeared in US-built cars in the 1940s they opened the car door for half of the world's population - women, the majority of whom that wanted to drive were baffled by the gear stick and clutch. But keen motoring enthusiasts have never really been big fans of automatic transmission systems because of the delay between gear changes and the loss of control. Ask any serious member of any of China's mushrooming car clubs about automatic transmissions and they will sneer in contempt. These gearheads enjoy managing the car's power themselves and want to feel and hear the engine reach maximum revs before sliding the stick into the next gear. They will rightfully argue that a good manual driver will beat a guy in an automatic every time. But not anymore. DSG transmission Volkswagen's latest model Magotan, made at the German carmaker's JV with FAW in Changchun, has Direct Shift Gear (DSG) transmission that can change gears in the blink of an eye - 8 milliseconds to be exact - matching the shutter speed of a SLR camera. But the car still drives just like an automatic. There is no clutch pedal. A computer inside the engine does all the work. For tech-minded people, there are in fact two clutches, two gear boxes and two transmission shafts at work allowing for such speedy changes. The transmission's first gear is selected on the first shaft, and the outer clutch prepares to engage. At the same time, the second gear is also selected, but the clutch pack for second gear remains fully disengaged. When the driver releases the foot brake pedal, the clutch pack for the first gear takes up the drive at the "biting point", transferring the torque from the engine through the transmission to the driveshafts - and the vehicle moves forward. As the car accelerates, the transmission's computer determines when the second gear connected to the second clutch should be fully engaged. Depending on vehicle speed and amount of power being requested by the driver (full throttle or part-throttle normal driving), the DSG then upshifts. During this sequence, the DSG disengages the first clutch while engaging the second, completing the shift sequence. It happens in 8 ms with practically no power loss.
The Magotan is the first car in China to carry the DSG matched with a super 2-liter TSI (turbo stratified injection) engine, and it really is a marvelous ride. There is very fast accelerator response and very little loss of engine power. The Magotan, badged a Passat B6 elsewhere around the globe, offers Chinese motorists a fabulous four-cylinder first - a brilliant turbo engine that uses Le Mans' winning racing car technology. This power plant combined with the car's conservative, yet sleek body, and lush interior, is set to appeal to the over-35 crowd. The mid-to-high-end segment is the fastest growing group in China. For most of 2007 it was dominated by the Toyota Camry followed by the popular Honda Accord. But VW is confident the Magotan will shake up the competition thanks to its new hi-tech turbo powered engine and the DSG technology. The Magotan's instant power is perfect for city cruising where low speeds are the norm, and power pushes of acceleration are needed for maneuvering through bumper-to-bumper traffic. The Magotan's zoom from 30 km/h to 60 km/h is much faster than its class rivals. (For more biz stories, please visit Industries)
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