010 PORSCHE TRACTION MANAGEMENT

Porsche’s four-wheel drive system has become increasingly clever with its torque distribution. This is down to Porsche Traction Management…

Tyres aren’t the only thing that determine traction. For 30 years, Porsche has been utilising four-wheel drive in the 911, with the Porsche Traction Management system increasing in complexity in recent years to optimise power transfer. The system operates using two differentials (one for each axle). With the transmission mounted in front of the engine, the front differential is powered by a perfectly straight propshaft from the rear differential. This ensures that power is distributed evenly. Traction on the rear wheels is managed by PTV (Porsche Torque Vectoring). PTV is the reason Porsche no longer talks of limited-slip differentials. Torque vectoring not only transfers power from side-to-side, it also independently brakes the inside wheel to enable greater turn-in. PTV is mechanically operated unless the ‘Plus’ option is specified, in which…

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Total 911 (Digital) - 1 Issue, No. 166

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