Method and device for detecting a detached tire
First Claim
1. A device for detecting a tire that has become detached from a vehicle, comprising:
- an arrangement for detecting rotational movements of wheels and generating a plurality of first quantities that are functions of the rotational movements that are detected;
a comparison arrangement in which at least one comparison involving the first quantities is performed;
an evaluation arrangement for providing a signal that is output as a function of an output of the at least one comparison; and
a sorting arrangement for performing, prior to the at least one comparison, a sorting operation in which at least two of the first quantities are sorted by value, wherein;
the detached tire is detected as a function of the signal output by the evaluation arrangement.
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Accused Products
Abstract
Device for detecting a detached tire of a vehicle. This device includes an arrangement for detecting the rotational movements of the wheels and generating first quantities that are dependent on the rotational movements detected. A comparison arrangement is also provided in which at least one comparison involving at least one of the first quantities is carried out, as well as an evaluation arrangement in which a signal is output as a function of the output of the at least one comparison. The at least one comparison carried out in the comparison arrangement is preceded by a sorting operation in which at least two of the first quantities are sorted by value; and a detached tire is detected as a function of the signal output by the evaluation arrangement.
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Citations
13 Claims
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1. A device for detecting a tire that has become detached from a vehicle, comprising:
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an arrangement for detecting rotational movements of wheels and generating a plurality of first quantities that are functions of the rotational movements that are detected;
a comparison arrangement in which at least one comparison involving the first quantities is performed;
an evaluation arrangement for providing a signal that is output as a function of an output of the at least one comparison; and
a sorting arrangement for performing, prior to the at least one comparison, a sorting operation in which at least two of the first quantities are sorted by value, wherein;
the detached tire is detected as a function of the signal output by the evaluation arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
the vehicle is equipped with a wheel slip control system.
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3. The device as recited in claim 2, wherein:
the wheel slip control system includes a vehicle dynamics control system.
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4. The device as recited in claim 3, wherein:
in specific system states of the vehicle dynamics control system, a generation of the first quantities involves a transformation of quantities represented by signals of the arrangement for detecting the rotational movements onto a common point.
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5. The device as recited in claim 4, wherein:
the transformation is performed if the vehicle dynamics control system is one of fully ready for operation and fully active.
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6. The device as recited in claim 1, wherein:
the first quantities of the two vehicle wheels whose first quantities have the two highest values are compared with each other in the at least one comparison.
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7. The device as recited in claim 6, wherein:
a difference between the two of the first quantities having the highest values is formed in at least one further comparison.
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8. The device as recited in claim 7, wherein:
if a vehicle dynamics control system is one of fully ready for operation, fully active, and in passive mode, a number of comparisons carried out in the comparison arrangement is incremented by one if the comparison arrangement determines that the wheel whose corresponding first quantity has the highest value is a driven wheel.
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9. The device as recited in claim 8, wherein:
a brake pressure specified by a driver is compared with a threshold value during an additional comparison, which was added through the determination that the wheel whose corresponding first quantity has the highest value is a driven wheel.
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10. The device as recited in claim 8, wherein:
if the vehicle dynamics control system is one of not fully ready for operation and not fully active, and not simultaneously in a passive mode, at least an anti-lock function is one of ready for operation and active.
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11. The device as recited in claim 7, wherein:
if the vehicle dynamics control system is one of not fully ready for operation and not fully active, a brake pressure specified by a driver is compared to a threshold value in the comparison arrangement.
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12. The device as recited in claim 1, wherein:
the evaluation arrangement detects the detached tire if outputs of all comparisons carried out one of regularly and irregularly in the comparison arrangement continuously indicates the detached tire for a period exceeding a predefinable minimum time period.
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13. A method of detecting a tire that has become detached from a vehicle, comprising:
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detecting rotational movements of wheels and generating first quantities that are a function of the rotational movements that are detected;
executing at least one comparison involving at least one of the first quantities in a comparison arrangement;
causing an evaluation arrangement to output a signal as a function of an output of the at least one comparison;
executing a sorting operation prior to the at least one comparison in which at least two of the first quantities are sorted by value; and
detecting the detached tire as a function of the signal output by the evaluation arrangement.
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Specification