2014 911 GT3 Section 3 9/12/13 7:53 AM Page 41
911 GT3 (991) 3.5 Gearshift strategies and shifting times General In addition to the short gear ratios and the short actuation travel of the shift paddles, Porsche Doppelkupplung (PDK) is characterized above all by its unique gearshift strategies and its short response and shifting times (including “lightning shifts”). These characteristics ensure a performance-oriented gearshift behavior with particularly sporty gear changes. The most important driving functions of the Porsche Dop-
Power transmission
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pelkupplung (PDK) are based on the strategies of the current 911 Carrera models. For differentiation and in order to adapt to the particularly sporty character of the new 911 GT3, new functions have been introduced and modified functions and specific fine-tuning measures implemented.
The following main development objectives were taken into account here:
• Reducing complexity • Improving interaction between driver and vehicle • Enhancing emotionality Increased performance is achieved with the following features: • Lightning shifts with very short response and shifting times • Performance-oriented adaptation of gear preselection Reduced complexity is achieved with the following features: • No special functions, such as Coasting, Auto Start Stop, ECO upshifts • Two driving modes: SPORT (basic setting) and “PDK SPORT” • Special functions, such as Launch Control, are available irrespective of driving mode • No kickdown
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• Increasing performance
Increased interaction between driver and vehicle is achieved with the following features: • Selector-lever position “M” as an uncompromisingly manual shift function • “M” with no automatic shift functions • “M” with maximum acceptance of gearshift commands even during extreme engine speed-oriented driving • “Paddle Neutral” with additional function based on a conventional clutch pedal Enhanced emotionality is achieved with the following features: • Adaptation of the basic gearshift strategy to performance-oriented driving dynamics without additional actuation of driving mode buttons • Adaptation of the one-touch direction on the selector lever to motor sports • Possibility of driving off with increased wheel slip with “Paddle Neutral” • Possibility of influencing driving dynamics individually with “Paddle Neutral” • No crawling without pressing the accelerator pedal
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