Electronic Roll Mitigation

Typically when a vehicle makes a sudden turn, the outside wheel takes the majority of the cornering loads. In order for the vehicle to make the turn, a significant amount of grip must exist at the tire contact patch. The additional body roll that occurs during this event places additional weight on this outside tire. These conditions, plus the lateral acceleration of the vehicle, combined with the center of gravity position in the vehicle can cause the vehicle to lift the two inside wheels in the turn and the vehicle rolls over the outside tire. Electronic Roll Mitigation (ERM) takes advantage of the principle that a tire in slip cannot handle cornering loads by building and applying enough brake pressure to intentionally drive the outside wheel into slip, not to the point of total lockup but close. As a result, the outside tire cannot support the cornering loads and the vehicle cannot maintain its original path. The new path is straighter, reducing the amount of lateral acceleration and transferring some of the weight back over to the inside tires, thus preventing a rollover.