US Modelle: ESP EIN/AUS..aber kein sportl. Fahren???

[JR]

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The second generation system added the following substantial improvements to the original system:

New Pressure Modulator
The second-generation Active Handling system utilizes the Bosch version 5.3 hydraulic pressure modulator. Bosch improved this version to become smaller, quieter and more efficient at lower temperatures. The new modulator can operate at -20° Celsius resulting in accelerated functioning capacity after cold startups. The pressure sensor originally located in the master cylinder was also integrated into the new pressure modulator.

Dynamic Rear Proportioning
The second-generation Active Handling system utilizes a newly designed dynamic rear brake proportioning system. The new enhancement is a software driven improvement which balances the rear brake pressure electronically thus preventing rear brake bias also known as "Brake Lockup". The new system replaces the physically standard brake proportioning valve and it's tubing components thus reducing weight and overall complexity.

Sideslip Angle Rate Control
The second-generation Active Handling system received a major addition in the form of a sideslip angle rate control. This addition is software based and senses a drivers response time to changing vehicle movements during handling maneuvers. The system compensates for driver errors by utilizing the vehicles braking and traction control systems to maintain the stability of the vehicle based upon the parameters programmed by General Motors.

Coefficient of Friction Estimation
The second-generation Active Handling system received another software upgrade in the form of improved calibration algorithms that estimate the friction coefficient of road surfaces. As traction on roads are decreased such as slippery road surfaces; a vehicle are biased towards slipping sideways. The new coefficient estimation takes this traction problem into account and factors it in with the rest of the Active Handling system inputs.

Rear Brake Stability Control
The second-generation Active Handling system received also added another software enhancement in the form of a rear brake stability control. This addition releases brake pressure on the inside rear wheel during high lateral acceleration maneuvers. This system assists drivers who do not estimate radius turns correctly during high speed and light braking. The system compensates for driver errors by utilizing the vehicles braking system thus allowing for a more predictable maneuver while keeping the vehicle on its initial vector.

Better Coordination
As has already been stated the second-generation Active Handling system work in conjunction with the Traction Control System. The second generation system continues this relationship but with which has been modified and refined to target specific rear brake pressures and controlling engine torque based upon the parameters programmed by General Motors. This modification results in improved acceleration and fewer engine sags.

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JR