Method for determining a brake state
First Claim
1. A method for determining the state of a motor vehicle brake having a temperature sensor arranged in or on a brake lining, said method comprising:
- said temperature sensor detecting a first temperature value;
said temperature sensor detecting at least one second temperature value after the first temperature value;
determining a time duration between detection time points of said first and said at least one second temperature values; and
determining said state of said brake, based on a time profile of said temperatures detected by said sensors;
wherein said first and at least one second temperature values are detected during a brake application for determining a brake-state, which brake application is initiated by a control unit at predeterminable time points or intervals during vehicle operation, without driver intervention.
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Accused Products
Abstract
In a method for determining the state of a motor vehicle brake, particularly the brake-lining state or the brake-lining thickness, a temperature sensor is arranged in the brake lining of the motor vehicle brake, and the temperature detected by the sensor is used to determine the brake state. In addition to a first temperature value, at least one second temperature value detected after the first temperature value and the time duration between the detection time points of the two temperature values are employed. The brake state is determined based on an evaluation of a time profile of temperature values sensed by said sensor.
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Citations
9 Claims
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1. A method for determining the state of a motor vehicle brake having a temperature sensor arranged in or on a brake lining, said method comprising:
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said temperature sensor detecting a first temperature value; said temperature sensor detecting at least one second temperature value after the first temperature value; determining a time duration between detection time points of said first and said at least one second temperature values; and determining said state of said brake, based on a time profile of said temperatures detected by said sensors; wherein said first and at least one second temperature values are detected during a brake application for determining a brake-state, which brake application is initiated by a control unit at predeterminable time points or intervals during vehicle operation, without driver intervention. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining the state of a motor vehicle brake having a temperature sensor arranged in or on a brake lining, said method comprising:
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said temperature sensor detecting a first temperature value; said temperature sensor detecting at least one second temperature value after the first temperature value; determining a time duration between detection time points of said first and said at least one second temperature values; and determining said state of said brake, based on a time profile of said temperatures detected by said sensors;
wherein,a brake application for determining a brake-state is initiated by a control unit at predeterminable time points or intervals during vehicle operation, without driver intervention, the first temperature value is detected at or near commencement of said brake application; a determination is made whether a temperature difference by which the at least one second temperature value exceeds the first temperature value is greater than a predetermined threshold value; when said temperature difference is greater than said threshold value, the time duration between the detection of the first temperature value and the at least one second temperature value is employed as a heat propagation time, characteristic of the brake state; and the predetermined threshold value has a magnitude such that it is indicative of a temperature rise that is caused by the braking.
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Specification