Cruise control (calculated in the ICM) with braking function
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The cruise control is integrated functionally in the Integrated Chassis Management (ICM). The ICM transmits the brake interventions to the DSC via an interface.
The cruise control maintains the speed at the selected level, between 30 km/h and 250 km/h. In comparison with a conventional cruise control, it has the following additional functions:
- If the engine drag torque in coasting (overrun) mode is not sufficient to maintain the selected speed, the DSC enhances deceleration with controlled brake intervention.
- Depending on the lateral acceleration, the set speed is adjusted during cornering. At the end of the bend, the required speed is reset.
- The so-called "handgas mode" enables the driver to use the drop arm on the steering column to continuously accelerate or decelerate in 2 stages. This means that the desired speed is reached more quickly.
- During controlled hill descent, the coasting cutout as well as shiftdown of the automatic gearbox are adapted. The DSC uses a temperature model to adjust the distribution of braking torque between the front and rear axle. The coasting cutout has a favorable effect on fuel consumption. Automatic shifting down and distribution of torque place a load on the wheel brake when driving downhill.