Mitsubishi has developed a new transmission system that is expected to feature in the new Lancer Evolution X, due to be launched this autumn. Twin Clutch SST (Sport Shift Transmission) is an automated manual transmission that delivers slicker shifting through the gears while freeing the driver from the need to operate the clutch.
In line with its corporate philosophy, Mitsubishi Motors strives to deliver a dynamic driving experience while making advances to keep drivers safe. Twin Clutch SST and S-AWC do so by making driving more intuitive. Both the systems work to efficiently distribute power appropriate to road conditions, and deliver outstanding control and stability maintained by an "intelligent" system
that reads and reflects driver intent in real time.
Twin Clutch SST:
MMC's new automated manual transmission employs dual clutches to realize power transmission efficiencies on a par with a normal manual gearbox while also allowing slick and swift shifting. Allowing drivers of all abilities to shift rapidly up and down through the gears, Twin Clutch SST delivers satisfying acceleration while also returning superior fuel mileage thanks to its
high-efficiency power transmission mechanism. The new transmission also features three operating modes tailored to different situations: from around-town drivability to instant-response and follow-the-line sporty motoring on the open road.
Twin Clutch SST (Sport Shift Transmission)
The mechanism
Twin Clutch SST puts odd (1st, 3rd, 5th) and even (2nd, 4th and 6th) gears on separate input shafts, each connected to an individual clutch. With both clutches under precise system control, this arrangement allows lightening-fast,
smooth and lag-free gear changes with no interruption in power delivery. Using clutches instead of a torque converter to transmit power makes the Twin Clutch SST simpler in structure and reduces power transmission losses for higher transmission efficiency that leads to improved fuel mileage.
Drive modes
Twin Clutch SST allows the driver to switch between three shifting programs — Normal, Sport and S-Sport — to cover the full range of driving situations, from town use to sporty motoring on open roads.
Normal mode
For use around town and other normal driving situations, Normal mode scheduling uses relatively low-speed shift points to deliver unobtrusive shifting for maximum comfort together with optimum fuel economy.
Sport mode
For use when driving in the mountains or when engine braking is required, Sport mode scheduling uses higher shift points and quicker shifting to deliver instant throttle response that instills in the driver a closer man/machine relationship.
S-Sport mode
Compared with Sport mode, S-Sport mode scheduling keeps the engine turning at higher revs while allowing lightening-fast shifting.
