PORSCHE DY­NAMIC CHAS­SIS CON­TROL

PDCC is be­com­ing more com­mon as a stan­dard fea­ture on mod­ern Ne­unelfers. To­tal 911 ex­plains how the anti-roll sys­tem works

Total 911 - - Data File -

“PDCC uses hy­drauli­cally ac­tu­ated cylin­ders to me­chan­i­cally al­ter the load”

When cor­ner­ing, all cars roll to­wards their out­side wheels. This means that the loads ex­pe­ri­enced by each tyre are no longer even, as the in­side edge ‘goes light’.

In or­der to achieve a greater equi­lib­rium be­tween all four con­tact patches Porsche has de­vel­oped an elec­tro­hy­draulic anti-roll bar sys­tem, re­sult­ing in more re­spon­sive han­dling when driv­ing your 911 to the limit.

Rather than us­ing nor­mal drop links be­tween the dampers and the an­tiroll bar, PDCC uses hy­drauli­cally ac­tu­ated cylin­ders to me­chan­i­cally al­ter the load on both the front and rear anti-roll bars. Sen­sors con­nected to each damper mea­sure the move­ment un­der both bump and re­bound, and these mea­sure­ments are then used to de­ter­mine how to load both anti-roll bars.

At each cor­ner of the car the cylin­ders move in the op­po­site di­rec­tion to the dampers, push­ing the anti-roll bar un­der bump and pulling dur­ing re­bound. This op­ti­mises the cam­ber of each wheel, im­prov­ing the wheel’s con­tact patch to the ground as well as en­sur­ing that the ideal amount of load is trans­ferred from wheel to wheel when turn­ing the cor­ner. All of this re­sults in a more di­rect turn-in while also en­sur­ing that the car feels more sta­ble dur­ing cor­ner­ing. How­ever, there is a caveat, as the tech­nol­ogy can rob the driver of ‘driver feel’ from the car dur­ing this pe­riod. Whether you like the tech­nol­ogy will come down to your driv­ing style, but we feel it’s a great sys­tem for pro­vid­ing even more sta­bil­ity right when you need it – on the limit.

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