ERM (Electronic Roll Mitigation)

From JeepForum.com Community Jeep Wiki

ERM or Electronic Roll Mitigation and Brake Assist

Wrangler Unlimited, Liberty, Compass, Patriot, Grand Cherokee and Commander feature Electronic Roll Mitigation (ERM) and Brake Assist included within the Electronic Stability Program (ESP). ERM is an added vehicle-stability measure designed to help maintain vehicle stability during an emergency maneuver or accident-avoidance situation. This system anticipates the potential for wheel lift by monitoring the driver’s steering wheel input and the speed of the vehicle. When ERM determines that the rate of change of the steering wheel angle and vehicle speed are sufficient to potentially cause wheel lift, it applies the appropriate brake and may reduce engine power to lessen the chance that wheel lift will occur. ERM will only intervene during very severe or evasive driving maneuvers. ERM will not aid vehicle stability in “trip” situations, such as when the vehicle strikes a curb or another object. Tests have shown that most drivers fail to apply the brake pedal vigorously enough during an emergency situation, so the Brake Assist system was designed to intervene if the driver reacts quickly but hesitantly when braking. The system recognizes situations in which emergency braking is called for and automatically increases brake pressure to its maximum. The system computer compares such factors as pedal travel, speed of pedal travel and road speed with other stored values to determine if an emergency situation exists, instantly activating an additional solenoid valve in the brake booster. The result is significantly reduced braking distance (up to 45 percent in an emergency).

Info courtesy of [Corwin Churchill Motors.com]

Rustywrangler 21:06, 2 November 2007 (CDT)