Method and device for determining filling pressure loss of a pneumatic vehicle tire
First Claim
1. A method for determining pressure loss in a pneumatic vehicle tire on a driven axle of a vehicle, said method comprising the steps of:
- measuring the rotational velocities of the wheels;
calculating slip values for the driven wheels based on the rotational velocities;
determining simultaneously wheel drive forces of the vehicle for the calculated slip values;
correlating the wheel drive forces and the slip values to produce a characteristic curve;
comparing the characteristic curve to a predetermined characteristic curve range; and
generating a warning signal when the characteristic curve surpasses the predetermined characteristic curve range.
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Accused Products
Abstract
In a method for determining pressure loss in a pneumatic vehicle tire on a driven axle of a vehicle the rotational velocities of the wheels are measured and slip values for the driven wheels are calculated therefrom. Simultaneously, wheel drive forces of the vehicle for the calculated slip values are determined. The wheel drive forces and the corresponding calculated slip values are correlated and a characteristic curve is produced. The characteristic curve is compared to a predetermined characteristic curve range and a warning signal is generated when the characteristic curve is outside the predetermined characteristic range. The device for performing the method has sensors for measuring the rotational velocities of the wheels. A device for determining slip of the driven wheels from the measured rotational velocity is provided. A device for determining the wheel driven forces is present. Furthermore, a device for determining the actual characteristic curve by approximation by correlating the wheel drive forces and the slip is provided. A device for inputting and memorizing a maximum slope limit of a predetermined characteristic curve range is provided. Another device compares the slope of the actual characteristic curve to the maximum slope limit and emits a warning signal when the slope of the actual characteristic curve surpasses the maximum slope limit.
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Citations
11 Claims
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1. A method for determining pressure loss in a pneumatic vehicle tire on a driven axle of a vehicle, said method comprising the steps of:
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measuring the rotational velocities of the wheels; calculating slip values for the driven wheels based on the rotational velocities; determining simultaneously wheel drive forces of the vehicle for the calculated slip values; correlating the wheel drive forces and the slip values to produce a characteristic curve; comparing the characteristic curve to a predetermined characteristic curve range; and generating a warning signal when the characteristic curve surpasses the predetermined characteristic curve range. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for determining pressure loss in a pneumatic vehicle tire on a driven axle of a vehicle, wherein rotational velocities of the wheels are measured, slip values for the driven wheels are calculated, wheel drive forces of the vehicle for the calculated slip values are simultaneously determined, wheel drive forces and calculated slip values are correlated to produce a characteristic curve, the characteristic curve is compared to a predetermined characteristic curve range, and a warning signal is generated when the characteristic curve is outside the predetermined characteristic curve range;
- said device comprising;
sensors for measuring the rotational velocities of the wheels of the vehicle; a device for determining slip values of the driven wheels from the measured rotational velocity; a device for determining the wheel drive forces; a device for determining an actual characteristic curve by approximation by correlating the wheel drive forces and the slip values; a device for inputting and memorizing a maximum slope limit defining a predetermined characteristic curve range; and a device for comparing the slope of the actual characteristic curve to the maximum slope limit and for emitting a warning signal when the slope of the actual characteristic curve surpasses the maximum slope limit. - View Dependent Claims (8, 9, 10, 11)
- said device comprising;
Specification