Method and device for triggering an automatic emergency braking process of a vehicle
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Abstract
The invention relates to a method and a device for triggering an automatic emergency braking process of a vehicle, in particular of a truck. Said device provides an assistance function for avoiding a rear end collision of the vehicle with a vehicle traveling in front and/or for reducing the consequences of an accident if a rear end collision is unavoidable, with a driver warning being triggered if a predefined warning condition (62) is fulfilled. The fulfillment of the warning condition (62) specifies that the automatic emergency braking process is to be triggered after the expiry of a predefined warning time period (tw=toa+th) in order to avoid the vehicle having a rear end collision with the vehicle traveling in front.
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Citations
44 Claims
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1-22. -22. (canceled)
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23. A method for triggering automatic emergency braking in a first vehicle to avoid, or mitigate the effect of, a rear end collision with a second vehicle traveling ahead of the first vehicle, said method comprising:
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determining an instantaneous driving situation of the first vehicle, based on a registered acceleration of the first vehicle and on a predefined emergency braking deceleration;
triggering a driver warning if at least one predefined warning condition is fulfilled; and
triggering an automatic emergency braking after the driver warning has been triggered;
wherein,fulfillment of the warning condition requires that, based on an instantaneous situation of the first vehicle, an automatic emergency braking process is to be triggered;
the warning condition includes, as target conditions, a predefined target safety distance and a predefined target relative speed between the first and second vehicles, which are to be attained after the automatic emergency braking process is completed;
in determining the instantaneous driving situation of the first vehicle, in addition to the registered acceleration of the first vehicle, a registered current relative acceleration between the first and second vehicles is also taken into account. and the triggering of an automatic emergency braking is delayed until expiration of a predefined warning time period after the driver warning has been triggered. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. Apparatus for carrying out automatic emergency braking in a first vehicle to avoid, or mitigate the effects of, a rear end collision with a second vehicle traveling ahead of the first vehicle, said apparatus comprising an evaluation unit which triggers a driver warning when at least one predefined warning condition stored in the evaluation unit is fulfilled;
- wherein;
the evaluation unit determines an instantaneous driving situation of the first vehicle, based on a registered acceleration of the first vehicle, and on a predefined emergency braking deceleration;
fulfillment of the warning condition requires that, based on the instantaneous driving situation of the first vehicle, an automatic emergency braking process is to be triggered by suitable actuation of braking means of the vehicle;
the warning condition includes, as target conditions, a predefined target safety distance and a predefined target relative speed between the first and second vehicles, which are to be attained when the automatic emergency braking process is completed;
in determining the instantaneous driving situation of the first vehicle, in addition to the registered acceleration of the first vehicle, a registered current relative acceleration between the first and second vehicles is taken into account;
an automatic emergency braking process is triggered only after the driver warning has been triggered and a predefined warning time period has expired thereafter.
- wherein;
Specification