Autoadaptive GearboxPSA Group has long recognized that an automatic gearbox requires different torque and power characteristics. The auto adaptive triple mode 'fuzzy logic' gearbox means that it is both faster and more economical. It also produces significantly lower emissions.
Developed by PSA Group, the automatic gearbox draws on the latest in manufacturing technology, computer software, electronics and, in particular, fuzzy logic. The four speed automatic offers the driver a choice of three modes, Normal, Sport and Snow/Slippery.
Beyond this each of the programmes has a further ranges of programmes it can use to provide the driver with the optimum gear changing solution for both his personal requirements and the driving conditions. These are chosen and mixed by the fuzzy logic software, so called because it takes decisions by classifying a very wide range of parameters in descending order of importance even if they are uncertain or contradictory.
The software also operates to minimize exhaust emissions by working in constant communication with the engine's control and management system and it has a complete service, error recording and limp home mode. It can even detect when the P407 is going down a hill and provide engine braking as required.
Automatic with manual override – Porsche's TiptronicPorsche's Tiptronic was the earliest semi-automatic transmission offered by a major car maker. First appeared in 1990 in 911 as an option, it soon became available in 968, Boxster and licensed to Audi and Mitsubishi for production. Meanwhile, Honda, BMW, Chrysler and Toyota also developed their own version.
Based on an automatic transmission with torque converter, besides conventional auto mode it offers a manual override allowing the driver to shift by pushing the shifter forward and backward. Note that it is no quicker than a conventional auto. It only intends to enhance driving fun through involving the driver.
In manual mode, the computer may intervene under harmful conditions. For instance, if the driver let the rev exceeding redline without upshift, the computer will shift automatically.
Tiptronic was developed in conjunction by Porsche, ZF and Bosch. Porsche originated the idea, ZF made the gearbox and Bosch responsible for the electronic control.
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