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Featured Article
3008 grip control : intelligent off-road traction
- 06 March 2009
- Viewed 100945 times

The ‘‘crossover’’ philosophy of the 3008 finds expression also through its traction system, the Grip Control.
This package combines an upgraded traction control system with Mud & Snow tyres.
Available as an option, it can be chosen by users looking for a vehicle that offers
enhanced ‘‘all terrain’’ capabilities and a performance in terms of traction that’s
far superior to that of a ‘‘traditional’’ vehicle regardless of the type of terrain encountered.
The aim of the system is to optimise the traction of both front wheels by means of an improved traction control (developed and patented by Bosch), incorporated within the ECU of the ESP.
Five modes are available to the driver and are accessible via a dedicated control on the centre console.
Standard mode, where the ESP is calibrated for a low level of wheel slip based on different grip levels normally experienced on roads.
Snow mode adapts its strategy to provide the best grip conditions for each of the front wheels when the car is pulling away. As the car gains speed, the system optimises traction control to guarantee the best possible acceleration according to the existing grip conditions. It returns to Standard mode when a speed in excess of 50 kph is detected.
All-terrain mode (mud, dirt track, wet grass, etc) allows a high level of slip on the least stable wheel when puling away to encourage the elimination of mud and improve grip. At the same time, the wheel with the strongest grip level is given
as much torque as possible. The torque offset between the front wheels can be
as much as 100%, well above the limits set for a limited slip differential (LSD).
As the car gains speed, the system optimises wheel slip to give the driver the best possible control over the car. This mode is active up to a speed of 80 kph.
Sand mode allows slight wheel slip on both drive wheels simultaneously, to allow the
vehicle to make headway and reduce the risk of getting stuck in the sand. Here too, the effect created by this mode is superior to that of a LSD system.
In this mode, Standard mode is reconnected automatically above a speed of 120 kph.
ESP Off mode allows the possibility of disconnecting the dynamic stability control (ESP) and Grip Control up to a speed of 50 kph, giving full control back to the driver. Above this speed, ‘‘ESP Standard’’ mode is reconnected automatically.
Grip Control includes Michelin Latitude Tour HP ‘‘Mud & Snow’’ 215/60 R16 tyres, also
suitable for off-road use (see next section).

