Method and device for detecting hydroplaning conditions for vehicle tires
First Claim
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1. A method for detecting a hydroplaning risk for vehicle tires, said method comprising the steps of:
- measuring continuously sequential deformations of tread elements of the vehicle tire in a circumferential direction over a circumferential length of the tread elements while passing through a contact zone of the vehicle tire and generating a sequence of corresponding signals, wherein said sequence of corresponding signals has a section, referred to as a positive impulse, wherein the deformations of the tread elements near a leading edge of the contact zone are counter to the direction of rotation;
differentiating the sequence of corresponding signals over the circumferential length to determine a slope near a center of the positive impulse;
comparing the slope to predetermined evaluation standards; and
as a function of said predetermined evaluation standards, determining the danger of hydroplaning when said slope is below a preset value whereby a warning signal is generated.
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Abstract
In a method for detecting a hydroplaning risk for vehicle tires the sequential deformations of tread elements of the vehicle tire in the circumferential direction during contacting the road surface are measured. A sequence of corresponding signals is generated. The sequence of corresponding signals is processed to produce processed signals. The processed signals are compared to predetermined evaluation standards, and a warning signal for indicating the imminent danger of hydroplaning is sent as a function of the predetermined standards.
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Citations
13 Claims
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1. A method for detecting a hydroplaning risk for vehicle tires, said method comprising the steps of:
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measuring continuously sequential deformations of tread elements of the vehicle tire in a circumferential direction over a circumferential length of the tread elements while passing through a contact zone of the vehicle tire and generating a sequence of corresponding signals, wherein said sequence of corresponding signals has a section, referred to as a positive impulse, wherein the deformations of the tread elements near a leading edge of the contact zone are counter to the direction of rotation; differentiating the sequence of corresponding signals over the circumferential length to determine a slope near a center of the positive impulse; comparing the slope to predetermined evaluation standards; and as a function of said predetermined evaluation standards, determining the danger of hydroplaning when said slope is below a preset value whereby a warning signal is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for detecting a hydroplaning risk for vehicle tires, wherein the sequential deformations of tread elements of the vehicle tire in a circumferential direction over a circumferential length of the tread elements while passing through a contact zone of the vehicle tire is measured continuously and a sequence of corresponding signals is generated, wherein said sequence of corresponding signals has a section, referred to as a positive impulse, wherein the deformations of the tread elements near the leading edge of the contact zone are counter to the direction of rotation, the sequence of corresponding signals is differentiated over the circumferential length to determine a slope near a center of the positive impulse, the slope is compared to predetermined evaluation standards, and, as a function of the predetermined evaluation standards, the danger of hydroplaning is determined, when said slope is below a preset value;
- said device comprising;
a processing unit; a sender embedded in at least one tread element of a vehicle tire; and a plurality of receivers positioned at an inner surface of the vehicle tire for detecting distance variations between said sender and said receiver, said receivers sending a signal, describing the deformation of the tread element in the circumferential direction, to said processing unit. - View Dependent Claims (11)
- said device comprising;
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12. A device for detecting a hydroplaning risk for vehicle tires, wherein a sequential deformations of tread elements of the vehicle tire in a circumferential direction over a circumferential length of the tread elements while passing through a contact zone of the vehicle tire is measured continuously and a sequence of corresponding signals is generated, wherein said sequence of corresponding signals has a section, referred to a positive impulse, wherein the deformations of the tread elements near the leading edge of the contact zone are counter to the direction of rotation, the sequence of corresponding signals is differentiated over the circumferential length to determine a slope near a center of the positive impulse, the slope is compared to predetermined evaluation standards, and, as a function of the predetermined evaluation standards, the danger of hydroplaning is determined, when said slope is below a preset value;
- said device comprising;
a processing unit; a sender embedded in at least one tread element of a vehicle tire; and a plurality of receivers positioned on the rim for detecting distance variations between said sender and said receivers, said receivers sending a signal, describing the deformation of the tread element in the circumferential direction, to said processing unit. - View Dependent Claims (13)
- said device comprising;
Specification