Porsche developed a 5-speed semi-automatic dual clutch gearbox on 1964, which was assembled on the Porsche 908. Starting from 1968, Porsche began to develop a 4-speed automatic dual-clutch gearbox, but at that time, it lacked high-performance electronic components required for sensitive clutch control and could not realize serial construction.
Then made some dual clutch gearboxes; Until 198 1 year, PDK finally developed on the previous basis. Porsche 956 and Porsche 962 equipped with PDK have achieved good results in the competition. After three years of research and development [2], PDK dual-clutch gearbox developed and manufactured by Porsche and ZF *** began to be assembled on Porsche road vehicles in 2009. According to public information, PDK should have two platforms, both 7-speed [3]:
The rear engines 9 1 1 and 7DT45HL, 7DT45HLA, 7DT45FL, 7DT70HL and 7DT70HLA are suitable for the mid-engine of Cayman and Boxster. The upper limit of engine torque is 450 Nm, 390 Nm and 700 Nm.
Panamera, 7DT75 and 7DT75A are for the front of the engine; The upper limit of engine torque is 525 Nm and 750 Nm.
Pdk are all wet clutches designed to match Porsche's longitudinal engine. PDK assembled by 20 15 Cayenne and 20 15 Macan has no detailed information.
Compared with Porsche, Volkswagen assembled the dual-clutch gearbox DSG on road vehicles as early as 2003. The DSG family gearbox was designed by Borg Warner and produced by Volkswagen. There are currently three models (excluding Audi's S tronic)[4]:
DQ2506 speed; The upper limit of engine torque is 350 Nm.
DQ2007 speed; The upper limit of engine torque is 250 Nm.
DQ5007 speed; The upper limit of engine torque is 600 Nm.
In which DQ250 and DQ500 are wet.