The new five-link rear suspension geometry, including a track bar, also improves lateral stiffness to match that of the front suspension for optimum handling.
The Dynamic Handling System (DHS) is standard with the Hemi engine -- Chrysler's first use of a hydraulic-controlled active stabilizer system. DHS significantly reduces body roll, resulting in sportier handling when turning or maneuvering, while providing a smoother ride when traveling straight ahead. Traditionally, a stiff stabilizer bar improves handling, but diminishes ride quality. The Jeep DHS overcomes this by effectively decoupling the front and rear stabilizer bars except when they are needed to improve cornering performance.
Suspension and steeringAlso offered for the first time, Electronic Stability Program (ESP) aids the driver in maintaining vehicle directional stability in severe driving maneuvers on any type of surface. Using signals from sensors throughout the vehicle, the system determines the appropriate brake and throttle adjustments for directional stability of the vehicle.
Grand Cherokee's new rack-and-pinion steering system imparts a more precise steering feel translated to the driver through fewer linkages than a recirculating ball steering system. Even with the 2.5-inch increase in track, Grand Cherokee's nimbleness and tight turning diameter are maintained with the new steering system.
The DHS uses the steering angle sensor, center of gravity lateral accelerometer and upper lateral accelerometer to determine when the stabilizer bar is necessary. Actuators pressurize the bar links when the bar is required. While traveling straight on-road, the actuators float and the bar can travel to the limits of the links. DHS delivers a high level of driver confidence by significantly reducing body roll in tight turns, resulting in sportier handling and maneuvering, while providing a smoother ride when traveling straight ahead.
