Method for adaptively controlling a vehicle speed in a vehicle, and speed control system for carrying out the method

Abstract

The invention relates to a method for adaptively controlling a vehicle speed (vFzg) in a vehicle (100), in particular a utility vehicle having a speed control system (200), comprising at least the following steps: determining a reference speed (vRef); actuating an engine (7) and / or brakes (6) and / or a transmission (8) of the vehicle (100) via the speed control system (200) in accordance with a target vehicle speed and / or a target vehicle deceleration in order to adapt the current vehicle speed (vFzg) to the reference speed in a fuel-efficient manner. According to the invention, the target vehicle speed and / or the target vehicle deceleration is determined for a current driving dynamic situation of the vehicle (100), defined by driving dynamic vehicle parameters (vFzg, M, A, B, P), in accordance with at least one calculation coefficient (W, X, Y, Z), wherein the at least one calculation coefficient (W, X, Y, Z) is provided by an external processor (10) outside of the vehicle (100) in accordance with the current driving dynamic vehicle parameters (vFzg, M, A, B, P), and in accordance with current route information (I) for a route section ahead, wherein the route section ahead is established on the basis of the current driving dynamic vehicle parameters (vFzg, M, A, B, P).

Description

technical field [0001] The invention relates to a method for adaptively regulating the vehicle speed in a vehicle, in particular a commercial vehicle having a speed regulating device, and to a speed regulating device for carrying out the method. Background technique [0002] In vehicles, in particular commercial vehicles, the regulation of the vehicle speed is known as a speed regulating device (GRA) or also as cruise control. They adjust the current vehicle speed to a reference speed preset by the driver without the need to operate the brake pedal. Such a system can be expanded by an adaptive regulation which additionally regulates the vehicle speed predictively and thus predetermines a fuel-saving driving style in order to reach this reference speed. The adaptive regulation for saving fuel takes into account, for example, road condition information, in particular the topography of the road section ahead. Such systems are known, for example, as powertrain predictive contr...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage here is that the entire route section to be traveled is calculated and therefore requires a great deal of computational effort and computing time in order to determine the speed profile of the predefined route section

Furthermore, the calculation is based on the current values ​​before the start of the journey, so that the calculated speed profile changes when events occur during the journey, such as a new congestion or when a congestion is lifted or the vehicle is unexpectedly loaded or unloaded. Inaccurate

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