Method for determining a dynamic vehicle distance between a following vehicle and a preceding vehicle of a platoon

Abstract

The invention relates to a method for determining a dynamic vehicle distance (Adyn) between a following vehicle (FF) and a preceding vehicle (VF) of a platoon, wherein a V2V signal (S1) can be wirelessly transferred between the following vehicle (FF) and the preceding vehicle (VF), comprising at least the following steps: determining a current maximum following-vehicle deceleration (zMax_FF) of the following vehicle (FF); determining a current transfer time for transferring to the following vehicle (FF) the information that the preceding vehicle (VF) has initiated an emergency braking operation (N); determining a current maximum preceding-vehicle deceleration (zMax_VF) of the preceding vehicle (VF); and determining the dynamic vehicle distance (Adyn) from a transfer distance (s) and from abraking distance difference (sB), wherein the transfer distance (s) indicates the distance traveled by the following vehicle (FF) between the initiation of an emergency braking operation (N) by the preceding vehicle (VF) and the initiation of an emergency braking operation (N) by the following vehicle (FF), wherein the transfer distance (s) depends on the current transfer time, and wherein the braking distance difference (sB) indicates a difference between a preceding-vehicle braking distance (w_VF) defined by the maximum preceding-vehicle deceleration (zMax_W) and a following-vehicle brakingdistance (w_FF) defined by the maximum following-vehicle deceleration (zMax_FF).

Description

technical field [0001] The invention relates to a method for determining the dynamic vehicle distance between a vehicle behind and a vehicle ahead in a train. Background technique [0002] In trains or convoys of several vehicles traveling in succession, preferably commercial vehicles, the distance between vehicles is usually adjusted stably based on usual and stably pre-set values ​​for braking performance and transmission time of information. This should ensure that, in the worst-case scenario, emergency braking by a vehicle in front does not lead to a collision with a vehicle immediately behind. [0003] Here, a usual or minimum required maximum front vehicle deceleration is assumed as a stably adjusted value for the vehicle in front, and a usual or worst possible or minimum required maximum rear vehicle deceleration is assumed for the rear vehicle and Assume a usual transmission time for communicating the information that the vehicle ahead has initiated emergency brakin...

AI Technical Summary

Problems solved by technology

It may thus be found that the actual distance between vehicles is not adjusted optimally because, for example, the minimum required braking performance results in a distance between vehicles which may not be exceeded based on actual values.

Therefore, although the safety is improved, the efficiency has not been improved to the best

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