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Determination of critical vehicle states and minimum vehicle separations

A vehicle state, vehicle technology, applied in the direction of vehicle components, transportation and packaging, external condition input parameters, etc.

Active Publication Date: 2019-01-01
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also situations where a collision is not yet imminent, but the situation is assessed as critical due to imminently falling below the safe distance to the vehicle in front

Method used

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  • Determination of critical vehicle states and minimum vehicle separations
  • Determination of critical vehicle states and minimum vehicle separations
  • Determination of critical vehicle states and minimum vehicle separations

Examples

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Embodiment Construction

[0074] The formula for calculating the length of the critical driving section and the formula for calculating the minimum distance between vehicles are deduced below.

[0075] v 2 (t)=v 2 (0) t≤t Reakt (1)

[0076] v 2 (t)=v 2 (0)+a 2 (t-t Reakt ) t>t Reakt (2)

[0077] v 1 (t)=v 1 (0)+a 1 t (3)

[0078] According to the above formulas (1) and (2), the current speed v of the first vehicle can be 2 (0), constant (usually negative) acceleration a of the first vehicle 2 and the reaction time t of the driver of the first vehicle Reakt , to determine the velocity v of the first vehicle 2 (t) time curve. In a similar manner it is possible to use equation (3) above, according to the current speed v of the second vehicle 1 (0) and a constant (usually negative) acceleration of the second vehicle a 1 to determine the speed v of the second vehicle 1 (t) time curve.

[0079] Equations (4) and (5) below give the time profile of the differential speed between the first...

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Abstract

In order to determine the vehicle status (11), the length of a critical travel section of the first vehicle (2) is determined. Here, the critical driving section is defined as that the first vehicle (2) traveling on the critical driving section is smaller than the second vehicle (1) traveling in front of the first vehicle (2) only in the entire critical driving section. The minimum distance associated with the speed (v2) of a vehicle (2). When the length of the critical driving section is longer than the predetermined length threshold (P5; P'5), the vehicle state (11) is determined to be critical. The minimum distance between vehicles is determined such that at least there must be a minimum distance between vehicles such that when the length of the critical travel section corresponds to a predetermined length threshold (P5), the first vehicle (2) only travels on the critical travel section from the first The second vehicle (1) in front of the vehicle (2) is smaller than the minimum distance associated with the speed (v2) of the first vehicle (2). Here, the minimum distance between vehicles defines the current distance (dx) between the first vehicle (2) and the second vehicle (1). The critical travel section is defined such that the first vehicle (2) traveling on the critical travel section is only closer to the second vehicle (1) than the minimum speed (v2) of the first vehicle (2) over the entire critical travel section. spacing.

Description

technical field [0001] The invention relates to the determination of a critical state of a vehicle and the determination of a minimum distance from another vehicle. Background technique [0002] DE 10356307 A1 describes the warning of the driver of a vehicle to a collision based on the deceleration of the vehicle driving in front of the vehicle, the deceleration of the vehicle itself and the driver's reaction time, taking into account the distance between the vehicles and the relative speed. [0003] DE 10 2004 029 369 A1 discloses a lane change assistant for vehicles, in which the traffic environment including the traffic situation in adjacent lanes is detected. [0004] DE 10 2006 059 915 A1 specifies a traffic situation-adapted vehicle guidance in which the relative speed and distance between the own vehicle and the vehicle ahead is ascertained. [0005] Warning and intervention systems for the imminent collision of a vehicle with a vehicle ahead are already known in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/16B60W50/00
CPCB60W30/16B60W50/0098B60W2520/105B60W2520/10B60W2540/00B60W2554/804B60W2554/801B60W40/09
Inventor P.帕舍卡
Owner VOLKSWAGEN AG