Method for determining an emergency braking situation of a vehicle
First Claim
1. A method for determining an emergency braking situation of a vehicle, the method of comprising:
- determining state variables including at least two of (i) a speed of a first vehicle, (ii) a longitudinal acceleration of the first vehicle, (iii) a relative distance between the first vehicle and an object ahead, (iv) a speed of the object ahead, and (v) an acceleration of the object ahead; and
using at least one control unit to;
automatically determine, as a function of at least one of the determined state variables, to use one of at least two different methods to assess whether an emergency braking situation exists for the first vehicle, the at least two different methods including (a) an equation of motion assessment method by which an equation of motion system of the first vehicle and of the object ahead is determined and (b) a braking distance assessment method by which a braking distance of the first vehicle is determined;
effect the one of the at least two different methods to assess whether an emergency braking situation exists for the first vehicle; and
at least one of effect an emergency braking process and output a warning signal when an emergency braking situation exists based on a result of the assessment.
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Accused Products
Abstract
To determine whether an emergency braking situation exists for a vehicle, the vehicle determines at least the following state variables: its own velocity, its own longitudinal acceleration, its relative distance from an object in front, and the speed and acceleration of the object in front. A suitable evaluation method to assess whether an emergency braking situation is present is determined as a function of these state variables from a plurality of evaluation method options, including at least a movement equation evaluation method in which a movement equation system of the vehicle and of the object in front is determined, and an evaluation method in which a braking distance of the vehicle is determined.
144 Citations
14 Claims
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1. A method for determining an emergency braking situation of a vehicle, the method of comprising:
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determining state variables including at least two of (i) a speed of a first vehicle, (ii) a longitudinal acceleration of the first vehicle, (iii) a relative distance between the first vehicle and an object ahead, (iv) a speed of the object ahead, and (v) an acceleration of the object ahead; and using at least one control unit to;
automatically determine, as a function of at least one of the determined state variables, to use one of at least two different methods to assess whether an emergency braking situation exists for the first vehicle, the at least two different methods including (a) an equation of motion assessment method by which an equation of motion system of the first vehicle and of the object ahead is determined and (b) a braking distance assessment method by which a braking distance of the first vehicle is determined;
effect the one of the at least two different methods to assess whether an emergency braking situation exists for the first vehicle; and
at least one of effect an emergency braking process and output a warning signal when an emergency braking situation exists based on a result of the assessment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control device for a driving dynamics control system of a vehicle, the control device configured to determine state variables including at least two of (i) a speed of the vehicle, (ii) a longitudinal acceleration of the vehicle, (iii) a relative distance between the vehicle and an object ahead, (iv) a speed of the object ahead, and (v) an acceleration of the object ahead;
- determine, as a function of at least one of the determined state variables, to use one of at least two different methods to assess whether an emergency braking situation exists for the vehicle;
the at least two different methods including (a) an equation of motion assessment method by which an equation of motion system of the first vehicle and of the object ahead is determined and (b) braking distance assessment method by which a braking distance of the first vehicle is determined; and
at least one of effect an emergency braking process and output a warning signal when an emergency braking situation exists based on a result of the assessment.
- determine, as a function of at least one of the determined state variables, to use one of at least two different methods to assess whether an emergency braking situation exists for the vehicle;
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14. A driving dynamics control system comprising a control device, a distance sensor, a speed sensor, and a vehicle brakes, the control device being configured to:
- determine state variables including at least two of (i) a speed of the vehicle, (ii) a longitudinal acceleration of the vehicle, (iii) a relative distance between the vehicle and an object ahead, (iv) a speed of the object ahead; and
(v) an acceleration of the object ahead; and
determine, as a function of at least one of the determined state variables, to use one of at least two different methods to assess whether an emergency braking situation exists for the vehicle, the at least two different methods including (a) an equation of motion assessment method by which an equation of motion system of the first vehicle and of the object ahead is determined and (b) a braking distance assessment method by which a braking distance of the first vehicle is determined; and
at least one of effect an emergency braking process and output a warning signal when an emergency braking situation exists based on a result of the assessment.
- determine state variables including at least two of (i) a speed of the vehicle, (ii) a longitudinal acceleration of the vehicle, (iii) a relative distance between the vehicle and an object ahead, (iv) a speed of the object ahead; and
Specification