Dual Clutch Transmissions (DCT) have been in volume productions since 2003 in passenger car markets. The technology potentially has applicability beyond passenger cars, but up until recently commercial vehicle applications have been limited; some van applications of passenger car transmission and the Light Duty Fuso Duonic system in the Canter. Eaton have addressed this gap by designing the Procision system to meet the needs of a range of applications within the Medium Duty segment (Approx. 10-16T range) with initial release in NAFTA mid-2015, see Fig 1. DCT technology combines many of the best attributes of AT and AMT systems. It maintains the simplicity, efficiency and serviceability of constant mesh gearing present in AMT systems. DCT also provides powershift capability for smooth continuous acceleration and, as in Procision system, when combined with wet clutches provides increased low speed performance and manoeuvring. The Procision implementation of DCT is optimised to provide significant fuel economy benefits relative to an AT system whilst delivering comparable performance. It also provides significant performance and low speed manoeuvring benefits relative to an AMT, whilst maintaining comparable fuel economy.
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