April - June
PDK success story: a bestseller in just five yearsThe
Stuttgart. We've come full circle. In den 1980s,
With 54 victories and numerous championships, the
2008: first PDK for sports cars in the 911
With progress made in the development of control electronics, this changed after the new millennium was hailed in.
The PDK gears are divided into two half gearboxes connected to the engine through two parallel powershift clutches. The odd-numbered gears and reverse gear are connected to clutch I – this package is the first half gearbox. Clutch II engages the even-numbered gears, making for the second half gearbox. In principle, the individual gears are selected via shift forks as in a mechanical manual transmission, which are activated electro-hydraulically, however, in the PDK. Gears one to six are designed for a sporty performance – the vehicles reach top speed in the sixth gear. The seventh gear has a long gear ratio for saving fuel.
The PDK was greeted by customers with praise from the very onset. One year after the 911
2013: comeback of the PDK in the 911 GT3 able to meet the needs of the circuit course
With the new 911 GT3, the capabilities of the PDK have reached a new level. Our motorsports engineers have thoroughly reworked the dual-clutch transmission mechanically and in terms of controls especially for the high-performance sports car. The result is a transmission that offers the driver all the features that count for driving performance taken over from the previous manual transmission, augmented by the performance advantages of the PDK. Thus it can be driven on circuit courses like a sequential gearbox – with even more potential and emotional driving fun.
“Lightning shifts” with extremely short response and shift times
Shift strategy and response time of the PDK in the 911 GT3 have been systematically developed for performance and are fundamentally different from those of other
Paddle neutral: decoupling function with the PDK of the 911 GT3
The driving performance of a sports car driven for optimal lap times is also determined by the clutch. Hence the PDK in the 911 GT3 has a “paddle neutral” function. If the driver pulls both shift paddles concurrently, the clutches of the PDK are opened and the force flow between engine and powertrain is interrupted. If both shift paddles are released again, the clutch closes with lightning speed when the PSM is switched off. If the PSM is activated, the clutch also closes quickly but not so pulse-like.
This function essentially offers two advantages: If the vehicle understeers, for instance on a wet road in a curve, the driver can neutralise by pulling the paddles, thus building up additional cornering force on the rear axle wheels. The second aspect refers to influencing the driving dynamics individually through the pulse-like onset of the drive power when coupling. Comparable to a traditional clutch in conjunction with a manual transmission, the rear of the vehicle can be consciously destabilised when turning.
Adaptive gear shifting with sporty strategies
The PDK offers the driver of the new 911 GT3 the alternative of leaving the shifting to the adaptive transmission control. Basically, the DSG of the new 911 GT3 has only two shifting strategies: Sports and Race Track. With them, the gear shifts in the new 911 GT3 are always quick. Shift processes and shift points get their bearings from the driving dynamics of the driver. In the Race Track mode, the PDK follows shift maps that are tailored to the requirements of pure circuit course operation. The gears are held longer and upshifts are carried out only with higher torques. The circuit course alignment also means that the shift program remains performance-oriented even with a moderately sporty driving style. Thus the high-performance sports car always moves within performance-driven operating points, and an increased propulsive power potential is available at every moment without the driver having to shift gears.
Shorter gear ratios: faster times on the Nürburgring Northern Loop
The mechanical changes of the 911 GT3-PDK in comparison to the dual-clutch transmissions in the other
As a result, the driving performance of the new 911 GT3 again sets records. Two values in particular are influenced by the PDK: With full acceleration, the 911 GT3 reaches the 100 km/h mark in 3.5 seconds and accelerates to 200 in less than twelve seconds. And the new 911 GT3 masters the Nürburgring Northern Loop, the admittedly most difficult race course in the world, in under 7 minutes and 30 seconds.